1681. Calcium Molybdate(VI)

Nomenclature

CAS number: 7789-82-4
(T-4)-Calcium (1:1) molybdate (MoO42-); calcium molybdenum oxide.
CaMoO4; mol wt 200.02.
Ca 20.04%, Mo 47.97%, O 32.00%.

Description and references

Prepn from sodium molybdate and CaSO4: Carosella, US 2460974 (1949 to U.S. Vanadium); by heating a stoichiometric mixture of CaO or CaCO3 and molybdic acid: Kroger, Nature 159, 674 (1947). Toxicity studies: L. T. Fairhall et al., “The Toxicity of Molybdenum,” U.S. Public Health Service Bulletin No. 293, Washington D.C. (1945) 36 pp.

Properties

Tetragonal crystals. d. 4.35. Practically insol in water, alcohol. Sol in concd mineral acids.

Use

In phosphors and luminescent materials.