Nomenclature
CAS number: 12068-69-8
Bismuth triselenide.
Bi
2Se
3; mol wt 654.84.
Bi 63.83%, Se 36.17%.
Description and references
Prepn by heating a stoichiometric mixture at
475° in evacuated tube: D"onges, 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.Use
In semiconductor research.