Nomenclature
CAS number: 20770-09-6
Tin diselenide.
Se
2Sn; mol wt 276.63.
Se 57.09%, Sn 42.91%.
SnSe
2.
Description and references
Prepd by passing the vapor of selenium over
heated tin: Little, On Selenium and Some of the Metallic Selenides, Gttingen (Thesis, 1859); by treating a soln of stannic chloride
with hydrogen selenide: Berzelius, cited in Mellor's vol. X, 785 (1930); by treating a
soln of an alkali selenostannate or sulfoselenostannate with hydrochloric
acid: Ditte, Compt. Rend. 95, 641 (1882).
Properties
Red-brown crystals. d 5.133 (Little); d 4.85 [Schneider, Pogg.
Ann. 127, 624 (1866)]. mp 650°. Soluble in alkali, concd
sulfuric acid, aqua regia, aq ammonia. Insol in water, dilute acids.
Dec in nitric acid. Forms potassium selenostannate with potassium
selenide; sodium selenostannate with sodium selenide.