hellyerite
Sign in to saveHellyerite, NiCO3·6(H2O), is a hydrated nickel carbonate mineral. It is light blue to bright green in colour, has a hardness of 2.5, a vitreous luster, a white streak and crystallises in the monoclinic system. The crystal habit is as platy and mammillary encrustations on its matrix. It is a pentahydrate according to X-ray crystallography. The solid consists of [Ni2(CO3)2(H2O)8] subunits with an extra pair of water of hydration.
Wikidata facts
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- Hellyerite-Heazlewoodite-Zaratite-255032.jpg
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- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 5.CA.20
- Nickel-Strunz 9th edition (updated 2009)
- 5.CA.20
- Commons category
- Hellyerite
- IMA Mineral Symbol
- Hy
- Strunz 8th edition (series ID, updated)
- Vb/C.01
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Hellyerite, NiCO3·6(H2O), is a hydrated nickel carbonate mineral. It is light blue to bright green in colour, has a hardness of 2.5, a vitreous luster, a white streak and crystallises in the monoclinic system. The crystal habit is as platy and mammillary encrustations on its matrix. It is a pentahydrate according to X-ray crystallography. The solid consists of [Ni2(CO3)2(H2O)8] subunits with an extra pair of water of hydration.
==Occurrence== The environment of formation, associated only with metamorphosed ultramafic rocks, is diagnostic compared with gaspeite, another nickel carbonate which is associated with supergene weathering of nickel sulfides.