Silver telluride

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Silver telluride
Silver telluride
CAS number 12002-99-2 YesY
PubChem 6914515
Molecular formula Ag2Te
Molar mass 341.3364 g/mol
Appearance grey-black crystals
Density 8.318 g/cm³
Melting point 955 °C (1,751 °F; 1,228 K)
Refractive index (nD) 3.4
Crystal structure Monoclinic, mP12
Space group P21/c, No. 14
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Silver telluride (Ag2Te) is a chemical compound, a telluride of silver, also known as disilver telluride or silver(I) telluride. It forms a monoclinic crystal. In a wider sense, silver telluride can be used to denote AgTe (silver(II) telluride, a metastable compound) or Ag5Te3.

Silver(I) telluride occurs naturally as the mineral hessite, whereas silver(II) telluride is known as empressite.

Silver telluride is a semiconductor which can be doped both n-type and p-type. Stochoimetric Ag2Te has n-type conductivity. On heating silver is lost from the material.

Non-stoichiometric silver telluride has shown extraordinary magnetoresistance.


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