Nepskoeite Mineral Data (original) (raw)

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

Click Here for Larger Nepskoeite Image in a New Browser Window Images:

Click Here for Larger Nepskoeite Image Nepskoeite 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:

OrthorhombicSpace 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:

06.04.11.01 (06)Hydroxides and Oxides Containing Hydroxyl

(06.04)containing multiple cations

(06.04.11)Dana Group

06.04.11.01 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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Ask about Nepskoeite here :
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Print or Cut-and-Paste your Nepskoeite Specimen Label here :

Nepskoeite

Mg4Cl(OH)7•6(H2O)
Dana No: 06.04.11.01 Strunz No: 03.BD.20
Locality:

Notes: