Nepskoeite
Nepskoeite is an IMA-recognized mineral species in the halide class, with the chemical formula Mg₄Cl(OH)₇·6H₂O.
It crystallizes in the orthorhombic crystal system.
Key properties: Mohs hardness 1.5–2; specific gravity 1.76; White streak; Pearly luster; optically biaxial.
IMA symbol Nep, IMA status: approved, named in 1996.
Found in anhydrite-halite rock in a salt deposit.
It is found associated with Anhydrite, halite, fluoborite, pyrrhotite.
The name is derived from the locality, the Nepskoye salt deposit.
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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