Stannic Selenide
Title: Stannic Selenide
CAS Registry Number: 20770-09-6
Additional Names: Tin diselenide
Molecular Formula: Se2Sn
Molecular Weight: 276.63
Percent Composition: Se 57.09%, Sn 42.91%
Line Formula: SnSe2
Literature References: Prepd by passing the vapor of selenium over heated tin: Little, On Selenium and Some of the Metallic Selenides, Göttingen (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.
Melting point: mp 650°
Density: d 5.133 (Little); d 4.85 [Schneider, Pogg. Ann. 127, 624 (1866)]

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