Title: Bismuth Selenide
CAS Registry Number: 12068-69-8
Additional Names: Bismuth triselenide
Molecular Formula: Bi2Se3
Molecular Weight: 654.84
Percent Composition: Bi 63.83%, Se 36.17%
Literature References: Prepn by heating a stoichiometric mixture at 475° in evacuated tube: Dönges, Z. Anorg. Allg. Chem. 265, 56 (1951); Konorov, Zh. Tekh. Fiz. 26, 1394 (1956); from BiO, Se and sodium oxalate at high press.: Cambi, Elli, Chim. Ind. (Milan) 50, 94 (1968).
Properties: Black crystals. Rhombohedral and hexagonal crystal structure. d420 7.70 (also reported as 6.82). mp 710°. Heat of formation: -13.9 kcal/mol. Heat of combustion: 296.4 kcal/mol. Dec when heated in air. Dec by concd nitric acid and aqua regia. Insol in water.
Melting point: mp 710°
Density: d420 7.70 (also reported as 6.82)
Use: In semiconductor research.