| Kratochvílite | |
|---|---|
| General | |
| Category | Organic mineral |
|
Formula (repeating unit) | C13H10 |
| IMA symbol | Ktc [1] |
| Strunz classification | 10.BA.25 |
| Crystal system | Orthorhombic |
| Crystal class | Pyramidal (mmm) |
| Space group | Orthorhombic H-M symbol: (mm2) Space group: Pnam |
| Identification | |
| Color | White |
| Streak | White |
| Optical properties | Biaxial (+) |
| Refractive index | nα = 1.578 nβ = 1.663 nγ = 1.919 |
| Birefringence | δ = 0.341 |
| References | [2] [3] [4] |
Kratochvilite is a rare organic mineral formed by combustion of coal or pyritic black shale deposits. It is a hydrocarbon with the formula of either C13H10 or (C6H4)2CH2. It is a polymorph of the aromatic hydrocarbon fluorene. It forms white, yellow to brown crystals in the orthorhombic system which occur often as a druzey encrustation. It has a specific gravity of 1.21 and a Mohs hardness of 1 to 2.
It was first described from the Nejedly mine in Bohemia, Czech Republic in 1937. [3]
References
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode: 2021MinM...85..291W. doi: 10.1180/mgm.2021.43. S2CID 235729616.
- ^ Kratochvilite data on Webmineral
- ^ a b Mindat.org
- ^ "The Handbook of Mineralogy" (PDF). Archived from the original (PDF) on 2016-03-03. Retrieved 2017-09-08.
 | This article about a specific mineral or mineraloid is a stub. You can help Wikipedia by expanding it. |
| Kratochvílite | |
|---|---|
| General | |
| Category | Organic mineral |
|
Formula (repeating unit) | C13H10 |
| IMA symbol | Ktc [1] |
| Strunz classification | 10.BA.25 |
| Crystal system | Orthorhombic |
| Crystal class | Pyramidal (mmm) |
| Space group | Orthorhombic H-M symbol: (mm2) Space group: Pnam |
| Identification | |
| Color | White |
| Streak | White |
| Optical properties | Biaxial (+) |
| Refractive index | nα = 1.578 nβ = 1.663 nγ = 1.919 |
| Birefringence | δ = 0.341 |
| References | [2] [3] [4] |
Kratochvilite is a rare organic mineral formed by combustion of coal or pyritic black shale deposits. It is a hydrocarbon with the formula of either C13H10 or (C6H4)2CH2. It is a polymorph of the aromatic hydrocarbon fluorene. It forms white, yellow to brown crystals in the orthorhombic system which occur often as a druzey encrustation. It has a specific gravity of 1.21 and a Mohs hardness of 1 to 2.
It was first described from the Nejedly mine in Bohemia, Czech Republic in 1937. [3]
References
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode: 2021MinM...85..291W. doi: 10.1180/mgm.2021.43. S2CID 235729616.
- ^ Kratochvilite data on Webmineral
- ^ a b Mindat.org
- ^ "The Handbook of Mineralogy" (PDF). Archived from the original (PDF) on 2016-03-03. Retrieved 2017-09-08.
|
| This article about a specific mineral or mineraloid is a stub. You can help Wikipedia by expanding it. |