Korshunovskite Mineral Data

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.

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),

Physical Properties of Korshunovskite

Color:

Colorless.

Density:

1.798 - 1.787, Average = 1.79

Diaphaniety:

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= 0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2824,KPDmeas= 0.2977,KC= 0.2945

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:

r_electron=1.87 gm/cc
note: r_{Korshunovskite}=1.79 gm/cc.

Fermion Index

Fermion Index = 0.02373
Boson Index = 0.97627

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Korshunovskite is Not Radioactive

Korshunovskite Classification

Dana Class:

10.1.5.1 (10)Oxyhalides and Hydroxyhalides

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

(10.1.5)Dana Group

10.1.5.1 Korshunovskite Mg2Cl(OH)3·3.5-4(H2O) P1 or P1 Tri

Strunz Class:

III/D.01-10 III - Halogenides

III/D - Oxi-halogenides with Mg - Mn - Cu - Zn - Sn

III/D.01 - Atacamite series, Korshunovskite - Anthonyite

III/D.01-10 Korshunovskite Mg2Cl(OH)3·3.5-4(H2O) P1 or P1 Tri

III/D.01-12 Nepskoeite! Mg4Cl(OH)7·6(H2O) Pcmm,Pcm2,Pc2m Ortho

III/D.01-15 Hibbingite (Fe,Mg)2(OH)3Cl Pnam 2/m 2/m 2/m

III/D.01-20 Kempite Mn2Cl(OH)3 Pnam 2/m 2/m 2/m

III/D.01-25 Belloite! Cu(OH)Cl P 2₁/a 2/m

III/D.01-30 Atacamite Cu2Cl(OH)3 Pmcn 2/m 2/m 2/m

III/D.01-40 Clinoatacamite! Cu2(OH)3Cl P 2₁/n 2/m

III/D.01-50 Botallackite Cu2Cl(OH)3 P 2₁/m 2/m

III/D.01-55 Paratacamite (Cu,Zn)2(OH)3Cl R 3 3

III/D.01-57 Herbertsmithite! Cu3Zn(OH)6Cl2 R 3m 3 2/m

III/D.01-60 Melanothallite Cu2OCl2 F ddd 2/m 2/m 2/m

III/D.01-65 Bobkingite! Cu5Cl2(OH)8(H2O)2 C 2/m 2/m

III/D.01-70 Calumetite Cu(OH,Cl)2·2(H2O) Unk Ortho

III/D.01-80 Anthonyite Cu(OH,Cl)2·3(H2O) Unk. Mono

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 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Korshunovskite

Mg2Cl(OH)3·3.5-4(H2O)
Dana No: 10.1.5.1 Strunz No: III/D.01-10
Locality:

Notes: