Nomenclature
CAS number: 1313-85-5
Na
2Se; mol wt 124.94.
Na 36.80%, Se 63.20%.
Description and references
Prepd by adding selenium to a soln of sodium
in liquid ammonia: Hugot, Compt. Rend. 129, 299 (1899); Ann. Chim. Phys. [7] 21, 34 (1900); Feher in Handbook of Preparative Inorganic Chemistry vol. 1, G. Brauer, Ed. (Academic Press, New York, 2nd
ed., 1963) p 421.
Properties
Amorphous crystals. d10 2.625. mp >875°. Turns red on exposure to air and deliquesces.
Dec in water. Insol in ammonia.Derivative
Hemienneahydrate.
Properties
Fine needles. Turns red on exposure to air and
deliquesces.Derivative
Decahydrate.
Properties
Needles. Turns red and then brown on exposure
to air.Derivative
Hexadecahydrate.
Properties
Prisms. mp 40°. Dec in air to sodium carbonate, selenium and a
small amount of sodium selenide.