Calcium Selenide
Title: Calcium Selenide
CAS Registry Number: 1305-84-6
Molecular Formula: CaSe
Molecular Weight: 119.04
Percent Composition: Ca 33.67%, Se 66.33%
Literature References: Prepd by reducing CaSeO4 in a stream of H2 at 400-500°: Ehrlich in Handbook of Preparative Inorganic Chemistry vol. 1, G. Brauer, Ed. (Academic Press, New York, 2nd ed, 1963) p 939.
Properties: White powder. In air may turn red within a few minutes and light brown in a few hours. d 3.82. Decomposed by water. Treatment with HCl produces H2Se gas, and red Se separates.
Density: d 3.82
Use: In electron emitters.

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