Calcium selenide

Calcium selenide
Calcium selenide
Are common
Systematic ; name	Calcium selenide
Traditional names	Calcium Selenium
Chem. formula	CaSe
Physical properties
condition	colorless crystals
Molar mass	119.04 g / mol
Density	3.82 g / cm³
Thermal properties
T. melt.	1470 ° C
Optical properties
Refractive index	2,274
Classification
Reg. CAS number	1305-84-6
Pubchem
Reg. EINECS number	215-141-5
SMILES
Inchi
Chemspider

Calcium selenide is a binary inorganic compound of calcium and selenium with the formula CaSe, colorless crystals that redden in the light, reacts with water.

Content

Getting

Calcium reduction with calcium selenate :

{\mathsf {CaSeO_{4}+4H_{2}\ {\xrightarrow {400-500^{o}C}}\ CaSe+4H_{2}O}}

{\ displaystyle {\ mathsf {CaSeO_ {4} + 4H_ {2} \ {\ xrightarrow {400-500 ^ {o} C}} \ CaSe + 4H_ {2} O}}}

Effect of selenium vapors on calcium metal:

{\mathsf {Ca+Se\ {\xrightarrow {220^{o}C}}\ CaSe}}

{\ displaystyle {\ mathsf {Ca + Se \ {\ xrightarrow {220 ^ {o} C}} \ CaSe}}}

The reaction of hydrogen selenide and calcium amide :

{\mathsf {Ca(NH_{2})_{2}+H_{2}Se\ {\xrightarrow {}}\ CaSe+2NH_{3}}}

{\ displaystyle {\ mathsf {Ca (NH_ {2}) _ {2} + H_ {2} Se \ {\ xrightarrow {}} \ CaSe + 2NH_ {3}}}}

Calcium sulfide and selenium oxide reaction:

{\mathsf {CaS+SeO_{2}\ {\xrightarrow {200^{o}C}}\ CaSe+SO_{2}}}

{\ displaystyle {\ mathsf {CaS + SeO_ {2} \ {\ xrightarrow {200 ^ {o} C}} \ CaSe + SO_ {2}}}

Physical Properties

Calcium selenide forms colorless crystals that redden in the light and then turn brown, cubic syngony , space group F m 3 m , cell parameters a = 0.5908 nm, Z = 4.

Chemical Properties

Decomposed by acids:

{\mathsf {CaSe+2HCl\ {\xrightarrow {}}\ CaCl_{2}+H_{2}Se\uparrow }}

{\ displaystyle {\ mathsf {CaSe + 2HCl \ {\ xrightarrow {}} \ CaCl_ {2} + H_ {2} Se \ uparrow}}}

Literature

Chemical Encyclopedia / Redkol .: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1990. - T. 2. - 671 p. - ISBN 5-82270-035-5 .
Chemist Handbook / Redkol .: Nikolsky B.P. et al. - 2nd ed., Rev. - M.-L.: Chemistry, 1966. - T. 1. - 1072 p.
Chemist Handbook / Redkol .: Nikolsky B.P. et al. - 3rd ed., Rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.
Manual on inorganic synthesis: B 6 tons / Ed. Brower G. .. - M .: Mir, 1985. - T. 3. - 392 p.
CRC Handbook of Chemistry and Physics . - 89th edition. - Taylor and Francis Group, LLC, 2008-2009.
State diagrams of double metal systems / Ed. N. P. Lyakishev. - M .: Mashinostroenie, 2001. - T. 3 Book 1. - 972 p. - ISBN 5-217-02843-2 .