tetradymite

[ te-trad-uh-mahyt ]

Phonetic (Standard)IPA

noun

a mineral, bismuth telluride and sulfide, Bi 2 Te 2 S, occurring in soft-gray to black foliated masses.

tetradymite

/ ��ɛˈ�ٰ�æ��ɪˌ��ɪ�� /

a grey metallic mineral consisting of a telluride and sulphide of bismuth. Formula: Bi 2 Te 2 S

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1840–50; < Greek �ٱ�ٰ�á��⳾ ( os ) fourfold ( tetra-, didymous ) + -ite ¹; modeled on German Tetradymit

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C19: from Late Greek tetradumos fourfold, from Greek tetra- + didumos double

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Examples have not been reviewed.

The tritelluride constitutes the mineral tetradymite, Bi2Te3.

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It is also found in some comparatively rare minerals, such as tetradymite, combined with tellurium, and associated with gold.

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