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Zaratite : ウィキペディア英語版
Zaratite

Zaratite is a bright emerald green and questionable nickel carbonate mineral with formula Ni3CO3(OH)4·4H2O. Zaratite crystallizes in the isometric crystal system as massive to mammillary encrustations and vein fillings. It has a specific gravity of 2.6 and a Mohs hardness of 3 to 3.5. It has no cleavage and is brittle to conchoidal fracture. The luster is vitreous to greasy.
It is a rare secondary mineral formed by hydration or alteration of the primary nickel and iron bearing minerals, chromite, pentlandite, pyrrhotite, and millerite, during the serpentinization of ultramafic rocks. Hellyerite, NiCO3·6H2O, is a related mineral.
It was found originally in Galicia, Spain in 1851, and named after Spanish diplomat and dramatist Antonio Gil y Zarate (1793–1861).
==See also==

* Nickel(II) carbonate
*List of minerals
*List of minerals named after people

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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