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About NepskoeiteHide

Mg4Cl(OH)7 · 6H2O
Colourless with a bright yellow tint.
1½ - 2
Crystal System:
Named after its location.
This page provides mineralogical data about Nepskoeite.

Classification of NepskoeiteHide


B : Simple halides, with H2O
D : Simple halides with H2O and additional OH

Physical Properties of NepskoeiteHide

Colourless with a bright yellow tint.
1½ - 2 on Mohs scale

Optical Data of NepskoeiteHide

Biaxial (-)
RI values:
nα = 1.532 nβ = 1.562 nγ = 1.562
Measured: 5°
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of NepskoeiteHide

Mg4Cl(OH)7 · 6H2O

Crystallography of NepskoeiteHide

Crystal System:

Type Occurrence of NepskoeiteHide

Synonyms of NepskoeiteHide

Other Language Names for NepskoeiteHide


Related Minerals - Nickel-Strunz GroupingHide

3.BD.05CadwaladeriteAlCl(OH)2 · 4H2OAmor.
3.BD.10LesukiteAl2Cl(OH)5 · 2H2OIso. m3m (4/m 3 2/m) : Im3m
3.BD.15KorshunovskiteMg2Cl(OH)3 · 4H2OTric.
3.BD.25KoeneniteNa4Mg9Al4Cl12(OH)22Trig. 3m (3 2/m) : R3m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for NepskoeiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1998): 127(1): 41-46.

Internet Links for NepskoeiteHide

Localities for NepskoeiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
  • Eastern-Siberian Region
    • Prebaikalia (Pribaikal'e)
      • Irkutskaya Oblast'
        • Lower Tunguska
          • Nepa River basin
[AmMin 84:686]
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