argyrodite [är jir′ə dīt΄]n.a dark gray, soft mineral, Ag8GeS6, found in silver veins, and used as a major source of germanium
* * *▪ mineralheavy, dark sulfosalt mineral, a silver and germanium sulfide (Ag8GeS6), in which the element germanium was discovered (1886). It is a relatively scarce mineral found in sulfide veins in Germany and in Bolivia. It forms a solid solution series with canfieldite in which tin replaces germanium in the crystal structure, which belongs to the isometric system. For detailed physical properties, see sulfosalt (table).
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