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Nepskoeite Mineral Data

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General Nepskoeite Information

Help on Chemical  Formula: Chemical Formula: Mg4Cl(OH)7•6(H2O)
Help on Composition: Composition: Molecular Weight = 359.82 gm
   Magnesium  27.02 %  Mg   44.81 % MgO
   Hydrogen    5.32 %  H    47.56 % H2O
   Chlorine    9.85 %  Cl    9.85 % Cl
                -   %   Cl   -2.22 % -O=Cl2   
   Oxygen     57.81 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg4Cl(OH)7•6(H2O)
Help on Environment: Environment: Marine potash-bearing salt bed associated with anhydrite-halite rocks. Chemically similar to korshunovskite.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: The Asia Nepskoe salt deposit, Nepa river basin in the northern part of Lower Tunguska, Eastern Siberia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after it's location.
Help on Synonym: Synonym: IMA1996-016

Nepskoeite Image

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Comments: Cream-colored nodules of nepskoeite recovered from potash ore preserved in glass tube 1.5 cm long.
Location: Nepskoe Deposit, Irkutsk District, Siberia, Russia. Scale: Nodule Size 0.1 mm.
© Diederik Visser

Nepskoeite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.5899:1:6.1491
Help on Cell Dimensions: Cell Dimensions: a = 11.215, b = 3.124, c = 19.21, Z = 2; V = 673.03 Den(Calc)= 1.78
Help on Crystal System: Crystal System: Orthorhombic Space Group: Pcmm,Pcm2,Pc2m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.498(1), 9.78(0.46), 9.6(0.38),

Physical Properties of Nepskoeite

Help on Color: Color: Yellowish white.
Help on Density: Density: 1.76
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Plastic - Splintery - Thin, soft flexable, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Nepskoeite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.11 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.098 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3101,KPDmeas= 0.3136,KC= 0.2825
Ncalc = 1.5
Help on Optical Data: Optical Data: Biaxial (-), a=1.532, b=1.562, g=1.562, bire=0.0300, 2V(Calc)=0, 2V(Meas)=5. Dispersion weak, r < v.

Calculated Properties of Nepskoeite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.86 gm/cc
note: Specific Gravity of Nepskoeite =1.78 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PENepskoeite = 1.34 barns/electron
U=PENepskoeite x rElectron Density= 2.50 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nepskoeite is Not Radioactive

Nepskoeite Classification

Help on  Dana Class: Dana Class: (06)Hydroxides and Oxides Containing Hydroxyl
  (06.04)containing multiple cations
  (06.04.11)Dana Group Nepskoeite! Mg4Cl(OH)7•6(H2O) Pcmm,Pcm2,Pc2m Ortho
Help on  Strunz Class: Strunz Class: 03.BD.20 03 - HALIDES
  03.B - Simple Halides, with H2O
  03.BD -Simple Halides with H2O and additional OH
03.BD.20 Nepskoeite! Mg4Cl(OH)7•6(H2O) Pcmm,Pcm2,Pc2m Ortho

Other Nepskoeite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Eur. J. Min.,Vol.10,1998) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Nepskoeite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Dana No: Strunz No: 03.BD.20





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