Paraotwayite
Paraotwayite is an IMA-recognized mineral species in the sulfate class, with the chemical formula Ni(OH)₂₋ₓ(SO₄,CO₃)₀.₅ₓ.
It crystallizes in the monoclinic crystal system.
Key properties: specific gravity 3.3; White streak; Silky luster; optically biaxial.
IMA symbol Potw, IMA status: approved, named in 1984.
Found as a very rare secondary mineral in veinlets in altered ore from a hydrothermal nickel deposit in a serpentinized peridotite.
It is found associated with Millerite, polydymite, nickeloan chrysotile, dolomite, gaspéite.
Its name comes from the Greek for near, and for its similarity to otwayite.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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