베릴륨텔루라이드

베릴륨텔루라이드 화학적 특성, 용도, 생산

• 개요

  Beryllium telluride (BeTe) is a chemical compound whose molecular weight is 136.6122 g/mol. Its CAS number is 12232-27-8 and it has a density of 5.12 g/ cm³. Its structure is one of the sphalerite cF8 group with a space group of F43m (#216). It is a crystalline solid with face-centered symmetry, a = 5.615 ? at 300 K.
  It can be prepared by heating the elements together in an inert atmosphere:
  Be+ Te+ heat ? BeTe
  Te melts at 450°C and Be melts at 1287°C. A heating temperature of 750°C is sufficient to cause complete reaction. BeTe is a crystalline solid with the lattice constant of 0.5615 nm. It is a semiconductor with a large energy gap of around 3 eV. Toxicity is unknown, but both beryllium and tellurium are toxic. Toxic H2Te gas is evolved on exposure to water.

• 물리적 성질

  Gray powders, decomposing relatively rapidly in air. Crystallize in structure type B3 (ZnS type), d (BeSe) 4.32, d (BeTe) 5.09.

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