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n. An uncommon silver germanium sulfide mineral, black with a purplish tinge and metallic lustre.

n. A mineral containing silver, sulphur, and the new element germanium. It occurs in steel-gray crystalline aggregates at Freiberg, Saxony.

n. a rare steel-grey mineral consisting of silver and germanium and sulfur

"The term argyrodite now refers to an entire class of compounds that have a specific arrangement of atoms and type of structure."

mineral