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Nepskoeite

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Big Photo

Nepskoe K salt deposit, Nepa River basin, Lower Tunguska, Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia
© 2008, JGW




Formula:
Mg
 
4
Cl(OH)
 
7
 · 6H
 
2
O
System:OrthorhombicColour:Colourless with a bright ...
Lustre:PearlyHardness:1½ - 2
Name:Named after its location.
This page provides mineralogical data about Nepskoeite.

Classification of Nepskoeite

IMA status:Approved
Strunz 8th edition ID:3/D.01-12
Nickel-Strunz 10th (pending) edition ID:3.BD.20

3 : HALIDES
B : Simple halides, with H2O
D : Simple halides with H2O and additional OH
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Type Occurrence of Nepskoeite

Type Locality:Nepskoe K salt deposit, Nepa River basin, Lower Tunguska, Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia

Physical Properties of Nepskoeite

Lustre:Pearly
Colour:Colourless with a bright yellow tint.
Streak:White
Hardness (Mohs):1½ - 2

Crystallography of Nepskoeite

Crystal System:Orthorhombic

Optical Data of Nepskoeite

Type:Biaxial (-)
RI values: nα = 1.532 nβ = 1.562 nγ = 1.562
2V:Measured: 5°
Maximum Birefringence:δ = 0.030

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:weak

Chemical Properties of Nepskoeite

Formula:
Mg
 
4
Cl(OH)
 
7
 · 6H
 
2
O
Essential elements:Cl, H, Mg, O
All elements listed in formula:Cl, H, Mg, O

Relationship of Nepskoeite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
3.BD.05Cadwaladerite
AlCl(OH)
 
2
 · 4H
 
2
O
3.BD.10Lesukite
Al
 
2
Cl(OH)
 
5
 · 2H
 
2
O
3.BD.15Korshunovskite
Mg
 
2
Cl(OH)
 
3
 · 4H
 
2
O
3.BD.25Koenenite
Na
 
4
Mg
 
9
Al
 
4
Cl
 
12
(OH)
 
22

Other Names for Nepskoeite

Synonyms:
IMA1996-016
Other Languages:
German:Nepskoeit
Spanish:Nepskoeita

Other Information

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

References for Nepskoeite

Reference List:

- +
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1998): 127(1): 41-46.

Internet Links for Nepskoeite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Nepskoeite details from Handbook of Mineralogy (PDF) [Link dead]
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    • Localities for Nepskoeite

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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Russia
     
    • Eastern-Siberian Region
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
          • Lower Tunguska
            • Nepa River basin
    		[AmMin 84:686]
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