Magnesium chromite is an inorganic compound, a salt of magnesium and chromic acid with the formula Mg (CrO 2 ) 2 , dark green crystals, dissolves in water.
| Magnesium chromite | |
|---|---|
| General | |
| Systematic name | Magnesium chromite |
| Traditional names | Magnesium oxochromate (III); magnesium dichrom tetraoxide; magnesium chromate |
| Chem. formula | MgCr 2 O 4 |
| Rat formula | Mg (CrO 2 ) 2 |
| Physical properties | |
| condition | dark green crystals |
| Molar mass | 192.30 g / mol |
| Density | 4.4 g / cm³ |
| Thermal properties | |
| T. melt. | 2390 ° C |
| Classification | |
| Reg. CAS number | 12053-26-8 |
| Reg. EINECS number | 235-001-7 |
Getting
- Sintering of oxides of magnesium and chromium :
- Decomposition of magnesium chromate upon heating:
Physical Properties
Magnesium chromite forms dark green crystals of cubic syngony , space group F d3m , cell parameters a = 0.832768 nm, Z = 8.
At 10 K, the transition to the phase of tetragonal syngony occurs, the space group I 4 1 / amd , cell parameters a = 0.589199 nm, c = 0.831677 nm, Z = 4.
Literature
- Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 2nd ed., rev. - M.-L.: Chemistry, 1966. - T. 1. - 1072 p.
- CRC Handbook of Chemistry and Physics . - 89th Edition. - Taylor and Francis Group, LLC, 2008-2009.