tetradymite

tetradymite
/te trad"euh muyt'/, n.
a mineral, bismuth telluride and sulfide, Bi2Te2S, occurring in soft-gray to black foliated masses.
[1840-50; < Gk tetrádym(os) fourfold (see TETRA-, DIDYMOUS) + -ITE1; modeled on G Tetradymit]

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      a sulfide mineral of bismuth and tellurium (Bi2Te2S). It is commonly found in gold-quartz veins and contact-metamorphic deposits, as in Idu, Japan; Sorata, Bolivia; Boliden, Sweden; and Boulder county, Colo., U.S. Tetradymite is classified in a group of metallike sulfide minerals closely resembling each other in physical properties and in the hexagonal symmetry of their crystals. For detailed physical properties, see sulfide mineral (table).

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Universalium. 2010.

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  • tetradymite — [te trad′i mīt΄] n. [Ger tetradymit < Gr tetradymos, fourfold (because it occurs in compound twin crystals) + Ger it, ITE1] a pale steel gray mineral, Bi2Te2S, consisting chiefly of tellurium and bismuth …   English World dictionary

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  • tetradymite — noun a grey mineral that is mostly a mixed sulfide of bismuth and tellurium …   Wiktionary

  • tetradymite — te·trad·y·mite …   English syllables

  • tetradymite — /tɛˈtrædəmaɪt/ (say te traduhmuyt) noun a mineral, bismuth telluride and sulphide, Bi2Te2S, occurring in soft grey to black foliated masses. {German Tetradymit, from Greek tetradymos fourfold + it ite1} …  

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