Names | |
---|---|
Other names
cobalt violet, cobalt(II) phosphate, cobalt orthophosphate, Pigment Violet 14
| |
Identifiers | |
3D model (
JSmol)
|
|
ChemSpider | |
ECHA InfoCard | 100.033.309 |
EC Number |
|
PubChem
CID
|
|
UNII | |
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
Co3(PO4)2 | |
Molar mass | 366.74231 g/mol |
Appearance | violet solid |
Density | 3.81 g/cm3 |
Melting point | 1,160 °C (2,120 °F; 1,430 K) |
insoluble | |
Solubility product (Ksp)
|
2.05×10−35 [1] |
28,110.0·10−6 cm3/mol | |
Refractive index (nD)
|
1.7 |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Cobalt phosphate is the inorganic compound with the formula Co3(PO4)2. It is a commercial inorganic pigment known as cobalt violet. [2] Thin films of this material are water oxidation catalysts. [3]
The tetrahydrate Co3(PO4)2•4H2O precipitates as a solid upon mixing aqueous solutions of cobalt(II) and phosphate salts.
[4]
[5] Upon heating, the tetrahydrate converts to the anhydrous material. According to
X-ray crystallography, the anhydrous Co3(PO4)2 consists of discrete phosphate (PO3−
4) anions that link Co2+
centres. The cobalt ions occupy both
octahedral (six-coordinate) and pentacoordinate sites in a 1:2 ratio.
[6]
[7]
Names | |
---|---|
Other names
cobalt violet, cobalt(II) phosphate, cobalt orthophosphate, Pigment Violet 14
| |
Identifiers | |
3D model (
JSmol)
|
|
ChemSpider | |
ECHA InfoCard | 100.033.309 |
EC Number |
|
PubChem
CID
|
|
UNII | |
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
Co3(PO4)2 | |
Molar mass | 366.74231 g/mol |
Appearance | violet solid |
Density | 3.81 g/cm3 |
Melting point | 1,160 °C (2,120 °F; 1,430 K) |
insoluble | |
Solubility product (Ksp)
|
2.05×10−35 [1] |
28,110.0·10−6 cm3/mol | |
Refractive index (nD)
|
1.7 |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Cobalt phosphate is the inorganic compound with the formula Co3(PO4)2. It is a commercial inorganic pigment known as cobalt violet. [2] Thin films of this material are water oxidation catalysts. [3]
The tetrahydrate Co3(PO4)2•4H2O precipitates as a solid upon mixing aqueous solutions of cobalt(II) and phosphate salts.
[4]
[5] Upon heating, the tetrahydrate converts to the anhydrous material. According to
X-ray crystallography, the anhydrous Co3(PO4)2 consists of discrete phosphate (PO3−
4) anions that link Co2+
centres. The cobalt ions occupy both
octahedral (six-coordinate) and pentacoordinate sites in a 1:2 ratio.
[6]
[7]