Polydymite, Ni 2+ Ni 2 3+ S 4, is a supergene thiospinel sulfide mineral associated with the weathering of primary pentlandite nickel sulfide.. Polydymite crystallises in the isometric system, with a hardness of 4.5 to 5.5 and a specific gravity of about 4, is dark violet gray to copper-red, often with verdigris and patina from associated copper and arsenic sulfides, and is typically in ...
Linnaeite Group, and the Thiospinel Group. Linnaeite-Polydymite Series. Compare siegenite.
Polydymite definition is - a mineral Ni4S5 consisting of a nickel sulfide that is isomorphous with linnaeite, siegenite, carrollite, and violarite.
Definition of POLYDYMITE in the Definitions.net dictionary. Meaning of POLYDYMITE. What does POLYDYMITE mean? Information and translations of POLYDYMITE in the most comprehensive dictionary definitions resource on the web.
Polydymite, a relatively rare mineral, has been confirmed in specimens from Hamilton by X-ray powder diffraction (White, 1970). JOINT COMMITTEE ON POWDER DIFFRACTON STANDARDS (1974) Selected Powder Diffraction Data for Minerals: Millerite, polydymite and violarite.
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Polydymite - Silvery filliform crystals to 7mm in and out of Calcite crystals. . This and many more mineral specimens are available for sale at Dakota Matrix Minerals.
For example, polydymite Ni 3 S 4 is a common mineral existed in ores, which crystallizes in cubic spinel structure with Ni 2+ /Ni 3+ couple [40, 41]. Although interesting structure, ...
Much to my surprise, Grays Quarry contains tiny acicular crystals of polydymite, a nickel sulfide, Ni ++ Ni +++ 2 S 4, encased in calcite crystals. Most crystals of polydymite seems to be octahedrons; however, some are finely acicular. As best that I can tell, polydymite forms from the oxidation of other nickel minerals.
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