Korshunovskite Mineral Data

General Korshunovskite Information

Chemical Formula:

Mg2Cl(OH)3•3.5-4(H2O)

Composition:

Molecular Weight = 207.15 gm

Magnesium 23.47 % Mg 38.91 % MgO

Hydrogen 5.35 % H 47.83 % H₂O

Chlorine 17.11 % Cl 17.11 % Cl

- % Cl -3.86 % -O=Cl₂

Oxygen 54.07 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg₂Cl(OH)₃•4(H₂O)

Environment:

Veinlets in dolomitic marble.

IMA Status:

Approved IMA 1982

Locality:

Korshunov iron ore deposti, Irkutsk, Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named after it's locality.

Name Pronunciation:

Korshunovskite + Pronunciation

Synonym:

ICSD 24668

PDF 36-388

Korshunovskite Image

Images:

Korshunovskite

Comments: White fibrous korshunovskite crystals.
Location: Korshunovskoye skarn Fe Deposit, Irkutsk, Irkutskaya Oblast', Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Korshunovskite Crystallography

Axial Ratios:

a:b:c =1.3824:1:1.1872

Cell Dimensions:

a = 8.64, b = 6.25, c = 7.42, Z = 2; alpha = 101.4°, beta = 103.9°, gamma = 72.7° V = 364.02 Den(Calc)= 1.89

Crystal System:

TriclinicSpace Group: P1 or P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 8.04(1), 2.439(0.95), 3.843(0.75),

Crystal Structure:

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de Wolff P M , Walter-Levy L , Acta Crystallographica , 6 (1953) p.40-44, The crystal structure of Mg2(OH)3(Cl,Br)*4H2O, Locality: synthetic

Physical Properties of Korshunovskite

Color:

Colorless.

Density:

1.798 - 1.787, Average = 1.79

Diaphaneity:

Transparent

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Korshunovskite

Gladstone-Dale:

CI meas= -0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2854,KPDmeas= 0.2977,KC= 0.2945
Ncalc = 1.53 - 1.55

Optical Data:

Biaxial (-), a=1.516, b=1.538, g=1.547, bire=0.0310, 2V(Calc)=64, 2V(Meas)=62.

Calculated Properties of Korshunovskite

Electron Density:

Bulk Density (Electron Density)=1.87 gm/cc
note: Specific Gravity of Korshunovskite =1.79 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Korshunovskite}= 1.72 barns/electron
U=PE_{Korshunovskite} x rElectron Density= 3.21 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Korshunovskite is Not Radioactive

Korshunovskite Classification

Dana Class:

10.01.05.01 (10)Oxyhalides and Hydroxyhalides

(10.01)where (A)2 (O,OH)3 Xq

(10.01.05)Dana Group

10.01.05.01 Korshunovskite Mg2Cl(OH)3•3.5-4(H2O) P1 or P1 Tri

Strunz Class:

03.BD.15 03 - HALIDES

03.B - Simple Halides, with H2O

03.BD -Simple Halides with H2O and additional OH

03.BD.15 Korshunovskite Mg2Cl(OH)3•3.5-4(H2O) P1 or P1 Tri

Other Korshunovskite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Korshunovskite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Print or Cut-and-Paste your Korshunovskite Specimen Label here :

Korshunovskite

Mg2Cl(OH)3•3.5-4(H2O)
Dana No: 10.01.05.01 Strunz No: 03.BD.15
Locality:

Notes: