This page is an archive of past discussions. Do not edit the contents of this page. If you wish to start a new discussion or revive an old one, please do so on the current talk page. |
For other talk page archives see User talk:Walkerma/Archives. Other close archives include:
Archive1 — Archive2 — Archive3 — Archive5 — Archive6 — Archive7 — Archive8 — Archive9 — Archive10
Summer 2005 discussions.
Well yeah, I'm a member of the Wikiproject Drugs and do a fair bit of pharmacological work. I've been drawing inept structural formulas of drugs since the good Mykhal deserted us, and filling out Template:Drugbox on as many drug-related pages as possible.
I would very much applaud a conjoint effort on drug pages. My basic chemistry is too rusty. Only last weekend I learnt that molecules diffuse into cells more easily if they are Zwitterions, something I should have known but didn't.
The box on paracetamol is rather large and not in keeping with the boxes on other pharmaceutical pages (e.g. cyclophosphamide, furosemide). We'll need to work something out. I would also support a box that can be changed instantly by modifying the template, instead of manually having to update the pages in question.
Shall we continue the discussion on Wikipedia_talk:WikiProject Drugs? That seems to me the most reasonable place to meet. JFW | T@lk 20:28, 6 Jun 2005 (UTC)
Thanks for the note about Category:Terpenes. I (no, sorry, Person unknown) created the category by mistake during the recent trawl through Category:Chemistry: I quickly moved the article into the pre-existing category, but I forgot to mark for delete. My vote is now on WP:CFD.
You asked about templates with arguments during the discussion on WikiProject drugs pages. These are possible, of course, but they seem overly complicated for long boxes like the chemboxes. See the citation templates at Wikipedia:Cite your sources for examples (and then try to use them, you'll see what I mean :)
Bravo on your article creation work! I shall have to get down to some myself, in between the annual stresses of the baccalaureat ... Cheers for now, Physchim62 20:58, 10 Jun 2005 (UTC)
Sodium sulfate is not on my priority list for the time being, so by all means take a stab at it. Ethanol now points to the right place as well (it used to redirect to ethyl alcohol). Calcium sulfate is now a stub in its own right instead of a redirect to gypsum, and I have eight more to do before we have places for all your photos! Physchim62 06:21, 14 Jun 2005 (UTC)
Hi, thanks for quite nice image of menthol isomers. However, the H3C- groups are rendered as 3HC- groups. Could you please fix it ? And also, I think that formulas without explicit hydrogen stereo bond would be more transparent. Mykhal 21:22, 19 Jun 2005 (UTC)
If you think the revised Image:Menthols.png image is fine now, you can archive this section on Menthols on your talk page because the issues in here have been resolved. If not, let me know how the Image:Menthols.png image can be improved and I will try to do it. H Padleckas 4 July 2005 13:45 (UTC)
You can do your own bloody article on this one, I don't even have a CAS number for it ;-) Thanks for the hint about arsenic trioxide, I'll take a look tomorrow; that being said, the problem here is almost too much info—getting the balance right is delicate. I have more info on antimony trioxide to include as well, and yes, I'll try and get a stub's worth on Bi2O3 (although it's less on my field). There is also an Yb2O3 stub ready and waiting for your picture. Cheers for now, Physchim62 23:39, 18 Jun 2005 (UTC)
Please see request at end of Wikipedia talk:WikiProject Chemicals#Pictures of chemical compounds. If some of that is too much trouble, then don't bother, and no particular hurry either. I understand you have responsibilities. Thank you. H Padleckas 07:37, 19 Jun 2005 (UTC)
Hi Walkerma. I talked to User:~K about drawing chemical formulae/reactions and he told me about the free ISIS draw. He also told me that you had created some graphics with it. I have got isis draw and its good but theres one thing I need it to do and I can't work out how to. It won't display carbons as C. How can you get it to display the carbon atoms like it displays every other one? Thanks.
Borb 22:17, 21 Jun 2005 (UTC)
I have also improved your "Sodium chloride crystal" image for clarity and uploaded in into WikiCommons as a *.png file. However the existing "Sodium chloride crystal" *.png file in Wikipedia takes precedence over the image in WikiCommons and therefore does not show up in the Sodium chloride and ionic crystal articles. I started working on this a long time ago and only finished rather recently. The new *.png image was made to take up significantly fewer kB of memory storage than the existing *.png image file in Wikipedia, but it does take up slightly more memory than the corresponding *.jpg image in Wikipedia, although it looks sharper and has other improvemenmts over the older *.jpg image. When you have some time, can you please compare these images in Wikipedia and WikiCommons. Is it worth doing this for the Cadmium chloride crystal image? I think it will be easier the second time around to make such a modification. H Padleckas 16:06, 24 Jun 2005 (UTC)
I read in your talk archive that you did not know how to export images directly from isis draw. It isn't very easy due to the lack of good image formats but this is how I do it. I choose export from the file menu and choose other. Then I choose Windows Meta File. This is like a vector format and is no good on its own. Hardly anything will open a windows meta file including even photoshop. But Paint shop pro does and I then use that to convert the WMF into a PNG. If you don't have somethign that can convert WMF to PNG then I would be happy to convert one for you. You can email it to me at borbus at gmail dot com. If you do choose to do this you might want to drop a message in my talk page to as I dont check my email as often as i should.
Borb 22:16, 24 Jun 2005 (UTC)
That's good to know! I called MDL-Elsevier, and they told me I would have to buy MDL-Draw if I wanted to be able to create PNG or GIF files directly. I'll try your technique when I'm home, and we can make this a part of the style guide if it works on most computers. I have been using IsisDraw for around ten years now and I'm more familiar with it than ChemDraw (though I teach a session on the latter)- but the college is getting me the latest ChemDraw with NMR predictions, etc. So hopefully soon I can create my own GIFs and PNGs without imposing on you and Henry. Thanks, Walkerma 15:03, 25 Jun 2005 (UTC)
My version of ISIS (2.4.) only allows export to a TGF format, whatever that is (IrfanView can't read it). There is no "other" choice. However I will be getting the latest ChemDraw with bells & whistles, so I expect to be using that by the end of the summer. I'm reluctant to change the ISIS version I'm using, all the settings are how I like them, it's great for my teaching and OK for writing papers. This problem on Wikipedia is my only snag, though I agree with PC's last comment. Walkerma 5 July 2005 15:00 (UTC)
This IsisDraw may well be a nice program, but I can't run it apparently on my Unix laptop. Any recommendation or other suggestions? Wim van Dorst July 5, 2005 15:36 (UTC).
Hi walkerma. Do you know of any good online source of data for chemicals? At the moment all I have is a very limited Nuffield Advanced book of data which is dated 1984 (do you think the data is possibly out of date now?). I have looked everywhere for physical data on all the amino acids. My data book has a couple of them. I have found all of there pI's and pK's though, even though they were on WP anyway, but they are different to the ones already on WP. How do I know which ones to believe? Borb 20:37, 12 July 2005 (UTC)
You took the paragraph about the criminal actions of the State and Federal governments out of Methyl isobutyl ketone! :-o
(I relocated it to the talk page, by the way!)
On a more serious note, I was thinking of changing the wording "very low solubility in water" to "rather low solubility in water" or "quite low solubility in water" to distinguish its solubility from that of non-polar solvents such as gasoline, etc. which have been found to have trace solubility in water anyway. There was a similar controversy about the water-solublility of the gasoline additive
MTBE (Methyl tert-butyl ether) a few years ago. It was worried that its rather low water solubility might allow it to be transported by water movement and contaminate the environment. By comparison, without this additive the solubility of gasoline is very low and is not considered as much of an environmental threat. In any event, nice start on the rewrite of the article.
H Padleckas 23:00, 20 July 2005 (UTC)
Henry, you are right, I think. I had in mind a comparison with acetone and MEK, but the CRC Handbook lists solubility as δ, meaning slightly soluble. Clearly it is a whole lot more soluble than gasoline and the like, and I don't want to be accused of collaborating with the US govt to lie and cover up this outrage. :-o Please reword as you see fit. Cheers, Walkerma 23:19, 20 July 2005 (UTC)
Thank you for the hints on the drawing settings for chemical structures. I will save the next ones with the larger scale.
I will also try to pass some of the drawings and pictures across languages or pass them directly to commons if I can. Unfortunately some of the IP's I have to use seem te have been abused before for spamming or something of this kind and are blocked for the access of german and english wiki proyects. Fortunately there are still some sites left for me that can access them.
Sorry if my answers take a bit longer. As spanish telefonica did not succeed in 30 month to give me a regular phoneline I am still without internet at home and can only use some spare time at work for colaboration.
cmx ( sugestions) -- 147.156.124.162 23:41, 20 July 2005 (UTC)
Hey Walkerma, I really like your addition to the indole page. Thanks. Minor boo-boo though: Your missing a methylene on 3-allyl-indole image.
I also noticed that you're now drawing structures with ChemDraw. I consider the PNG capabilities of ChemDraw to be not that great. May I suggest that save your ChemDraw images as TIFFs and convert them to PNGs using The GIMP. For some reason, the images become much larger, the filesizes are smaller, and they end up looking much better. ~K 02:38, 29 July 2005 (UTC)
Yes, I'll be adding as many methods to make indole as I can find, including the Pd-based reactions. First, I'm going to add the name reactions, because they are easy to do on their own page. I'm not familiar with IrfanView, but if it works, go for it. I look forward to the new indole additions. ~K 03:41, 29 July 2005 (UTC)
Hello Walkerma, In my searches for methods of making indoles, I've come across MANY different methods (most of which utilize Pd). These methods are specialized, so I don't feel they belong on the indole page. Additionally, they are not name reactions, so writing their own page is difficult. How do you suggest that we include them in the Wikipedia? I was thinking of starting a page entitled "Syntheses of indole", in which we could include a list of the major reactions and all the million little reactions that are so infrequently used. Please tell me what you think, and I look forward to your suggestions if you have any. ~K 00:17, 8 August 2005 (UTC)
The problem you are facing with indole as I see it is:
Whether you think a separate synthesis page, or a family page, or whether you think you'll just move on to something else, I'm sure all will be a useful contribution and they will evolve into the right thing- that's the beauty of Wikipedia. As for me, imitation is the highest form of flattery, and I am copying your style in writing a new page on the Pechmann coumarin synthesis, I hope to put this up tonight! Walkerma 01:21, 8 August 2005 (UTC)
Have you got a copy of Greenwood & Earnshaw handy to check on CoCl3? (I don't here in Caistor) My information is: red or yellow crystals, soluble in water, CAS [10241-04-0]. Sources: WebElements and Rubber Bible (there is nothing mentioned in Cotton & Wilkinson). Physchim62 10:37, 10 August 2005 (UTC)
Well I've done a rewrite on sulfurous acid, so I've nothing against articles on non-existant compounds! ;) I'll go with {{ Greenwood&Earnshaw}} as well, they are pretty careful about that kind of thing. We will of course need an article on Ammine complexes of cobalt(III) at some point: they are important historically in the development of Werner's theory of coordination compounds, and they are the classic kinetically inert complexes (low spin d6, and even more inert than Rh(III)). Only so many hours in the day though! Physchim62 19:51, 10 August 2005 (UTC)
Your message appears to be lost in the wastelands of North Lincolnshire... I only have the header "Table"... Physchim62 20:13, 16 August 2005 (UTC)
Now available at the Commons: NbCl5, Na2SO4, CeO2, NH4Cl), (CH3COO)2Pd, CaCO3, MgSO4.7H2O, MgSO4, HfO2, Yb2O3, Tb4O7, CuI, PbSO4, PbO2, Pb3O4, PbO, Alum, ferric ammonium sulfate, chrome alum and Police overtime. The first two are already in articles. Feel free to use these! Walkerma 20:33, 25 August 2005 (UTC)
I have now added most of these to articles, where those articles existed. We still need articles to go along with (CH3COO)2Pd, HfO2, Tb4O7, CuI, PbO, Pb3O4, ferric ammonium sulfate, chrome alum. Walkerma 04:18, 28 August 2005 (UTC)
Actually I think most of these compounds now have pages, in fact Tb4O7 has quite a reasonable-sized article now with refs. I called it terbium(III,IV) oxide, by the way, because this is how it is ALWAYS called in the literature and in catalogues when they don't call it "terbium peroxide." (shudder) A Google and SciFinder search for the more "proper" name tetraterbium heptaoxide showed up almost nothing other than what I had posted myself! Also, it's formula is dubious, some say it's just one part of a continuum between Tb2O3 and TbO1.83. I'm thinking of starting a Wikiproject, Wikipedia:WikiProject_Lanthanides_I_have_known_and_loved to help me with these, but I'm having trouble getting participants at the moment. I do have a new 250 g sample of Pr6O11 (only $44!) to play with, though, so I'm happy!
There are some "almost A-class" articles that could use your help on safety/hazards sections, particularly sulfuric acid and indole. Any time for those? I'd like to see us get some of the B-class articles promoted to A-class. Walkerma 16:02, 22 September 2005 (UTC)
This page is an archive of past discussions. Do not edit the contents of this page. If you wish to start a new discussion or revive an old one, please do so on the current talk page. |
For other talk page archives see User talk:Walkerma/Archives. Other close archives include:
Archive1 — Archive2 — Archive3 — Archive5 — Archive6 — Archive7 — Archive8 — Archive9 — Archive10
Summer 2005 discussions.
Well yeah, I'm a member of the Wikiproject Drugs and do a fair bit of pharmacological work. I've been drawing inept structural formulas of drugs since the good Mykhal deserted us, and filling out Template:Drugbox on as many drug-related pages as possible.
I would very much applaud a conjoint effort on drug pages. My basic chemistry is too rusty. Only last weekend I learnt that molecules diffuse into cells more easily if they are Zwitterions, something I should have known but didn't.
The box on paracetamol is rather large and not in keeping with the boxes on other pharmaceutical pages (e.g. cyclophosphamide, furosemide). We'll need to work something out. I would also support a box that can be changed instantly by modifying the template, instead of manually having to update the pages in question.
Shall we continue the discussion on Wikipedia_talk:WikiProject Drugs? That seems to me the most reasonable place to meet. JFW | T@lk 20:28, 6 Jun 2005 (UTC)
Thanks for the note about Category:Terpenes. I (no, sorry, Person unknown) created the category by mistake during the recent trawl through Category:Chemistry: I quickly moved the article into the pre-existing category, but I forgot to mark for delete. My vote is now on WP:CFD.
You asked about templates with arguments during the discussion on WikiProject drugs pages. These are possible, of course, but they seem overly complicated for long boxes like the chemboxes. See the citation templates at Wikipedia:Cite your sources for examples (and then try to use them, you'll see what I mean :)
Bravo on your article creation work! I shall have to get down to some myself, in between the annual stresses of the baccalaureat ... Cheers for now, Physchim62 20:58, 10 Jun 2005 (UTC)
Sodium sulfate is not on my priority list for the time being, so by all means take a stab at it. Ethanol now points to the right place as well (it used to redirect to ethyl alcohol). Calcium sulfate is now a stub in its own right instead of a redirect to gypsum, and I have eight more to do before we have places for all your photos! Physchim62 06:21, 14 Jun 2005 (UTC)
Hi, thanks for quite nice image of menthol isomers. However, the H3C- groups are rendered as 3HC- groups. Could you please fix it ? And also, I think that formulas without explicit hydrogen stereo bond would be more transparent. Mykhal 21:22, 19 Jun 2005 (UTC)
If you think the revised Image:Menthols.png image is fine now, you can archive this section on Menthols on your talk page because the issues in here have been resolved. If not, let me know how the Image:Menthols.png image can be improved and I will try to do it. H Padleckas 4 July 2005 13:45 (UTC)
You can do your own bloody article on this one, I don't even have a CAS number for it ;-) Thanks for the hint about arsenic trioxide, I'll take a look tomorrow; that being said, the problem here is almost too much info—getting the balance right is delicate. I have more info on antimony trioxide to include as well, and yes, I'll try and get a stub's worth on Bi2O3 (although it's less on my field). There is also an Yb2O3 stub ready and waiting for your picture. Cheers for now, Physchim62 23:39, 18 Jun 2005 (UTC)
Please see request at end of Wikipedia talk:WikiProject Chemicals#Pictures of chemical compounds. If some of that is too much trouble, then don't bother, and no particular hurry either. I understand you have responsibilities. Thank you. H Padleckas 07:37, 19 Jun 2005 (UTC)
Hi Walkerma. I talked to User:~K about drawing chemical formulae/reactions and he told me about the free ISIS draw. He also told me that you had created some graphics with it. I have got isis draw and its good but theres one thing I need it to do and I can't work out how to. It won't display carbons as C. How can you get it to display the carbon atoms like it displays every other one? Thanks.
Borb 22:17, 21 Jun 2005 (UTC)
I have also improved your "Sodium chloride crystal" image for clarity and uploaded in into WikiCommons as a *.png file. However the existing "Sodium chloride crystal" *.png file in Wikipedia takes precedence over the image in WikiCommons and therefore does not show up in the Sodium chloride and ionic crystal articles. I started working on this a long time ago and only finished rather recently. The new *.png image was made to take up significantly fewer kB of memory storage than the existing *.png image file in Wikipedia, but it does take up slightly more memory than the corresponding *.jpg image in Wikipedia, although it looks sharper and has other improvemenmts over the older *.jpg image. When you have some time, can you please compare these images in Wikipedia and WikiCommons. Is it worth doing this for the Cadmium chloride crystal image? I think it will be easier the second time around to make such a modification. H Padleckas 16:06, 24 Jun 2005 (UTC)
I read in your talk archive that you did not know how to export images directly from isis draw. It isn't very easy due to the lack of good image formats but this is how I do it. I choose export from the file menu and choose other. Then I choose Windows Meta File. This is like a vector format and is no good on its own. Hardly anything will open a windows meta file including even photoshop. But Paint shop pro does and I then use that to convert the WMF into a PNG. If you don't have somethign that can convert WMF to PNG then I would be happy to convert one for you. You can email it to me at borbus at gmail dot com. If you do choose to do this you might want to drop a message in my talk page to as I dont check my email as often as i should.
Borb 22:16, 24 Jun 2005 (UTC)
That's good to know! I called MDL-Elsevier, and they told me I would have to buy MDL-Draw if I wanted to be able to create PNG or GIF files directly. I'll try your technique when I'm home, and we can make this a part of the style guide if it works on most computers. I have been using IsisDraw for around ten years now and I'm more familiar with it than ChemDraw (though I teach a session on the latter)- but the college is getting me the latest ChemDraw with NMR predictions, etc. So hopefully soon I can create my own GIFs and PNGs without imposing on you and Henry. Thanks, Walkerma 15:03, 25 Jun 2005 (UTC)
My version of ISIS (2.4.) only allows export to a TGF format, whatever that is (IrfanView can't read it). There is no "other" choice. However I will be getting the latest ChemDraw with bells & whistles, so I expect to be using that by the end of the summer. I'm reluctant to change the ISIS version I'm using, all the settings are how I like them, it's great for my teaching and OK for writing papers. This problem on Wikipedia is my only snag, though I agree with PC's last comment. Walkerma 5 July 2005 15:00 (UTC)
This IsisDraw may well be a nice program, but I can't run it apparently on my Unix laptop. Any recommendation or other suggestions? Wim van Dorst July 5, 2005 15:36 (UTC).
Hi walkerma. Do you know of any good online source of data for chemicals? At the moment all I have is a very limited Nuffield Advanced book of data which is dated 1984 (do you think the data is possibly out of date now?). I have looked everywhere for physical data on all the amino acids. My data book has a couple of them. I have found all of there pI's and pK's though, even though they were on WP anyway, but they are different to the ones already on WP. How do I know which ones to believe? Borb 20:37, 12 July 2005 (UTC)
You took the paragraph about the criminal actions of the State and Federal governments out of Methyl isobutyl ketone! :-o
(I relocated it to the talk page, by the way!)
On a more serious note, I was thinking of changing the wording "very low solubility in water" to "rather low solubility in water" or "quite low solubility in water" to distinguish its solubility from that of non-polar solvents such as gasoline, etc. which have been found to have trace solubility in water anyway. There was a similar controversy about the water-solublility of the gasoline additive
MTBE (Methyl tert-butyl ether) a few years ago. It was worried that its rather low water solubility might allow it to be transported by water movement and contaminate the environment. By comparison, without this additive the solubility of gasoline is very low and is not considered as much of an environmental threat. In any event, nice start on the rewrite of the article.
H Padleckas 23:00, 20 July 2005 (UTC)
Henry, you are right, I think. I had in mind a comparison with acetone and MEK, but the CRC Handbook lists solubility as δ, meaning slightly soluble. Clearly it is a whole lot more soluble than gasoline and the like, and I don't want to be accused of collaborating with the US govt to lie and cover up this outrage. :-o Please reword as you see fit. Cheers, Walkerma 23:19, 20 July 2005 (UTC)
Thank you for the hints on the drawing settings for chemical structures. I will save the next ones with the larger scale.
I will also try to pass some of the drawings and pictures across languages or pass them directly to commons if I can. Unfortunately some of the IP's I have to use seem te have been abused before for spamming or something of this kind and are blocked for the access of german and english wiki proyects. Fortunately there are still some sites left for me that can access them.
Sorry if my answers take a bit longer. As spanish telefonica did not succeed in 30 month to give me a regular phoneline I am still without internet at home and can only use some spare time at work for colaboration.
cmx ( sugestions) -- 147.156.124.162 23:41, 20 July 2005 (UTC)
Hey Walkerma, I really like your addition to the indole page. Thanks. Minor boo-boo though: Your missing a methylene on 3-allyl-indole image.
I also noticed that you're now drawing structures with ChemDraw. I consider the PNG capabilities of ChemDraw to be not that great. May I suggest that save your ChemDraw images as TIFFs and convert them to PNGs using The GIMP. For some reason, the images become much larger, the filesizes are smaller, and they end up looking much better. ~K 02:38, 29 July 2005 (UTC)
Yes, I'll be adding as many methods to make indole as I can find, including the Pd-based reactions. First, I'm going to add the name reactions, because they are easy to do on their own page. I'm not familiar with IrfanView, but if it works, go for it. I look forward to the new indole additions. ~K 03:41, 29 July 2005 (UTC)
Hello Walkerma, In my searches for methods of making indoles, I've come across MANY different methods (most of which utilize Pd). These methods are specialized, so I don't feel they belong on the indole page. Additionally, they are not name reactions, so writing their own page is difficult. How do you suggest that we include them in the Wikipedia? I was thinking of starting a page entitled "Syntheses of indole", in which we could include a list of the major reactions and all the million little reactions that are so infrequently used. Please tell me what you think, and I look forward to your suggestions if you have any. ~K 00:17, 8 August 2005 (UTC)
The problem you are facing with indole as I see it is:
Whether you think a separate synthesis page, or a family page, or whether you think you'll just move on to something else, I'm sure all will be a useful contribution and they will evolve into the right thing- that's the beauty of Wikipedia. As for me, imitation is the highest form of flattery, and I am copying your style in writing a new page on the Pechmann coumarin synthesis, I hope to put this up tonight! Walkerma 01:21, 8 August 2005 (UTC)
Have you got a copy of Greenwood & Earnshaw handy to check on CoCl3? (I don't here in Caistor) My information is: red or yellow crystals, soluble in water, CAS [10241-04-0]. Sources: WebElements and Rubber Bible (there is nothing mentioned in Cotton & Wilkinson). Physchim62 10:37, 10 August 2005 (UTC)
Well I've done a rewrite on sulfurous acid, so I've nothing against articles on non-existant compounds! ;) I'll go with {{ Greenwood&Earnshaw}} as well, they are pretty careful about that kind of thing. We will of course need an article on Ammine complexes of cobalt(III) at some point: they are important historically in the development of Werner's theory of coordination compounds, and they are the classic kinetically inert complexes (low spin d6, and even more inert than Rh(III)). Only so many hours in the day though! Physchim62 19:51, 10 August 2005 (UTC)
Your message appears to be lost in the wastelands of North Lincolnshire... I only have the header "Table"... Physchim62 20:13, 16 August 2005 (UTC)
Now available at the Commons: NbCl5, Na2SO4, CeO2, NH4Cl), (CH3COO)2Pd, CaCO3, MgSO4.7H2O, MgSO4, HfO2, Yb2O3, Tb4O7, CuI, PbSO4, PbO2, Pb3O4, PbO, Alum, ferric ammonium sulfate, chrome alum and Police overtime. The first two are already in articles. Feel free to use these! Walkerma 20:33, 25 August 2005 (UTC)
I have now added most of these to articles, where those articles existed. We still need articles to go along with (CH3COO)2Pd, HfO2, Tb4O7, CuI, PbO, Pb3O4, ferric ammonium sulfate, chrome alum. Walkerma 04:18, 28 August 2005 (UTC)
Actually I think most of these compounds now have pages, in fact Tb4O7 has quite a reasonable-sized article now with refs. I called it terbium(III,IV) oxide, by the way, because this is how it is ALWAYS called in the literature and in catalogues when they don't call it "terbium peroxide." (shudder) A Google and SciFinder search for the more "proper" name tetraterbium heptaoxide showed up almost nothing other than what I had posted myself! Also, it's formula is dubious, some say it's just one part of a continuum between Tb2O3 and TbO1.83. I'm thinking of starting a Wikiproject, Wikipedia:WikiProject_Lanthanides_I_have_known_and_loved to help me with these, but I'm having trouble getting participants at the moment. I do have a new 250 g sample of Pr6O11 (only $44!) to play with, though, so I'm happy!
There are some "almost A-class" articles that could use your help on safety/hazards sections, particularly sulfuric acid and indole. Any time for those? I'd like to see us get some of the B-class articles promoted to A-class. Walkerma 16:02, 22 September 2005 (UTC)