Nickelbischofite
Nickelbischofite is an IMA-recognized mineral species in the halide class, with the chemical formula NiCl₂·6H₂O.
It crystallizes in the monoclinic crystal system (space group C2/m).
Key properties: specific gravity 1.932; optically biaxial.
IMA symbol Nbsf, IMA status: approved, named in 1978.
Occurs as an alteration product on the surface of drill core from an ultramafic intrusion containing low-grade nickel mineralization, formed after storage (Amos, Canada); as a volcanic sublimate (Mt. Shirane, Japan).
It is found associated with Coalingite, paratacamite, pentlandite, awaruite, heazlewoodite (Amos, Canada); alunogen (Mt. Shirane, Japan).
As the compositional nickel analog of bischofite, with which it is, however, not isostructural.
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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