Beryllium telluride
Encyclopedia
Beryllium telluride is a chemical compound of beryllium
and tellurium. It 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 hydrogen telluride
gas is evolved on exposure to water.
Beryllium
Beryllium is the chemical element with the symbol Be and atomic number 4. It is a divalent element which occurs naturally only in combination with other elements in minerals. Notable gemstones which contain beryllium include beryl and chrysoberyl...
and tellurium. It is a crystalline solid with the lattice constant
Lattice constant
The lattice constant [or lattice parameter] refers to the constant distance between unit cells in a crystal lattice. Lattices in three dimensions generally have three lattice constants, referred to as a, b, and c. However, in the special case of cubic crystal structures, all of the constants are...
of 0.5615 nm. It is a semiconductor
Semiconductor
A semiconductor is a material with electrical conductivity due to electron flow intermediate in magnitude between that of a conductor and an insulator. This means a conductivity roughly in the range of 103 to 10−8 siemens per centimeter...
with a large energy gap
Band gap
In solid state physics, a band gap, also called an energy gap or bandgap, is an energy range in a solid where no electron states can exist. In graphs of the electronic band structure of solids, the band gap generally refers to the energy difference between the top of the valence band and the...
of around 3 eV.
Toxicity is unknown, but both beryllium and tellurium are toxic. Toxic hydrogen telluride
Hydrogen telluride
Hydrogen telluride is the inorganic compound with the formula H2Te. The simplest hydride of tellurium, it is rarely encountered because of it decomposes rapidly to the constituent elements. Most compounds with Te-H bonds are unstable with respect to loss of H2. H2Te is chemically and structurally...
gas is evolved on exposure to water.