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Names | |
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IUPAC names
Dysprosium(III) chloride
Dysprosium trichloride | |
Identifiers | |
3D model (
JSmol)
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ChemSpider | |
ECHA InfoCard | 100.030.024 |
PubChem
CID
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UNII | |
CompTox Dashboard (
EPA)
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Properties | |
DyCl3 | |
Molar mass | 268.86 g/mol (anhydrous) |
Appearance | white solid |
Density | 3.67 g/cm3, solid |
Melting point | 647 °C (1,197 °F; 920 K) (anhydrous) |
Boiling point | 1,530 °C (2,790 °F; 1,800 K) |
Soluble | |
Structure | |
AlCl3 structure | |
Octahedral | |
Hazards | |
GHS labelling: [1] | |
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Warning | |
H315, H319, H335 | |
P302+P352, P305+P351+P338 | |
Flash point | Non-flammable |
Related compounds | |
Other
anions
|
Dysprosium(III) fluoride Dysprosium(III) bromide Dysprosium(III) iodide Dysprosium(III) oxide |
Other
cations
|
Terbium(III) chloride Dysprosium(II) chloride Holmium(III) chloride |
Related compounds
|
Dysprosium(II) chloride |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Dysprosium(III) chloride (DyCl3), also known as dysprosium trichloride, is a compound of dysprosium and chlorine. It is a white to yellow solid which rapidly absorbs water on exposure to moist air to form a hexa hydrate, DyCl3·6H2O. Simple rapid heating of the hydrate causes partial hydrolysis [2] to an oxychloride, DyOCl.
DyCl3 is often prepared by the " ammonium chloride route", starting from either Dy2O3 or the hydrated chloride DyCl3·6H2O. [3] [4] [5] These methods produce (NH4)2[DyCl5]:
The pentachloride decomposes thermally according to the following equation:
The thermolysis reaction proceeds via the intermediacy of (NH4)[Dy2Cl7].
Treating Dy2O3 with aqueous HCl produces the hydrated chloride DyCl3·6H2O, which cannot be rendered anhydrous by heating. Instead one obtains an oxychloride: [4]
Dysprosium(III) chloride is a moderately strong Lewis acid, which ranks as "hard" according to the HSAB concept. Aqueous solutions of dysprosium chloride can be used to prepare other dysprosium(III) compounds, for example dysprosium(III) fluoride:
Dysprosium(III) chloride can be used as a starting point for the preparation of other dysprosium salts. Dysprosium metal is produced when a molten mixture of DyCl3 in eutectic LiCl- KCl is electrolysed. The reduction occurs via Dy2+, at a tungsten cathode. [6]
Dysprosium compounds are believed to be of low to moderate toxicity, although their toxicity has not been investigated in detail.
![]() | |
Names | |
---|---|
IUPAC names
Dysprosium(III) chloride
Dysprosium trichloride | |
Identifiers | |
3D model (
JSmol)
|
|
ChemSpider | |
ECHA InfoCard | 100.030.024 |
PubChem
CID
|
|
UNII | |
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
DyCl3 | |
Molar mass | 268.86 g/mol (anhydrous) |
Appearance | white solid |
Density | 3.67 g/cm3, solid |
Melting point | 647 °C (1,197 °F; 920 K) (anhydrous) |
Boiling point | 1,530 °C (2,790 °F; 1,800 K) |
Soluble | |
Structure | |
AlCl3 structure | |
Octahedral | |
Hazards | |
GHS labelling: [1] | |
![]() | |
Warning | |
H315, H319, H335 | |
P302+P352, P305+P351+P338 | |
Flash point | Non-flammable |
Related compounds | |
Other
anions
|
Dysprosium(III) fluoride Dysprosium(III) bromide Dysprosium(III) iodide Dysprosium(III) oxide |
Other
cations
|
Terbium(III) chloride Dysprosium(II) chloride Holmium(III) chloride |
Related compounds
|
Dysprosium(II) chloride |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Dysprosium(III) chloride (DyCl3), also known as dysprosium trichloride, is a compound of dysprosium and chlorine. It is a white to yellow solid which rapidly absorbs water on exposure to moist air to form a hexa hydrate, DyCl3·6H2O. Simple rapid heating of the hydrate causes partial hydrolysis [2] to an oxychloride, DyOCl.
DyCl3 is often prepared by the " ammonium chloride route", starting from either Dy2O3 or the hydrated chloride DyCl3·6H2O. [3] [4] [5] These methods produce (NH4)2[DyCl5]:
The pentachloride decomposes thermally according to the following equation:
The thermolysis reaction proceeds via the intermediacy of (NH4)[Dy2Cl7].
Treating Dy2O3 with aqueous HCl produces the hydrated chloride DyCl3·6H2O, which cannot be rendered anhydrous by heating. Instead one obtains an oxychloride: [4]
Dysprosium(III) chloride is a moderately strong Lewis acid, which ranks as "hard" according to the HSAB concept. Aqueous solutions of dysprosium chloride can be used to prepare other dysprosium(III) compounds, for example dysprosium(III) fluoride:
Dysprosium(III) chloride can be used as a starting point for the preparation of other dysprosium salts. Dysprosium metal is produced when a molten mixture of DyCl3 in eutectic LiCl- KCl is electrolysed. The reduction occurs via Dy2+, at a tungsten cathode. [6]
Dysprosium compounds are believed to be of low to moderate toxicity, although their toxicity has not been investigated in detail.