Kamchatkite Mineral Data

Kamchatkite Mineral Data +

General Kamchatkite Information

Chemical Formula:

KCu++3OCl(SO4)2

Composition:

Molecular Weight = 473.32 gm

Potassium 8.26 % K 9.95 % K₂O

Copper 40.28 % Cu 50.42 % CuO

Sulfur 13.55 % S 33.83 % SO₃

Chlorine 7.49 % Cl 7.49 % Cl

- % Cl -1.69 % -O=Cl₂

Oxygen 30.42 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

KCu₃OCl(SO₄)₂

IMA Status:

Approved IMA 1988

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 66309

PDF 41-1394

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Kamchatkite Crystallography

Axial Ratios:

a:b:c =0.7575:1:0.5444

Cell Dimensions:

a = 9.741, b = 12.858, c = 7.001, Z = 4; V = 876.87 Den(Calc)= 3.59

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: P na2₁

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

By Intensity(I/I_o): 7.76(1), 3.501(0.65), 2.591(0.41),

Crystal Structure:

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Varaksina T V , Fundamensky V S , Filatov S K , Vergasova L P , Mineralogical Magazine , 54 (1990) p.613-616, The crystal structure of kamchatkite, a new naturally occuring, oxychloride sulphate of potassium and copper, Locality: Tolbachik Main Fracture eruption, Kamchatka, Russia

Physical Properties of Kamchatkite

Cleavage:

[???] Perfect

Color:

Greenish brown.

Density:

3.48

Diaphaniety:

Transparent

Hardness:

3.5 - Copper Penny

Luster:

Vitreous (Glassy)

Streak:

yellow

Optical Properties of Kamchatkite

Gladstone-Dale:

CI meas= -0.102 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.068 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2017,KPDmeas= 0.208,KC= 0.1888

Optical Data:

Biaxial (+), a=1.695, b=1.718, g=1.759, bire=0.0640, 2V(Calc)=76, 2V(Meas)=75.

Calculated Properties of Kamchatkite

Electron Density:

r_electron=3.44 gm/cc
note: r_Kamchatkite=3.59 gm/cc.

Fermion Index

Fermion Index = 0.00117
Boson Index = 0.99883

Photoelectric:

PE_Kamchatkite= 19.87 barns/electron
U=PE_Kamchatkite x r_electron= 68.42 barns/cc.

Radioactivity:

GRapi = 114.33 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Kamchatkite - barely detectable

Kamchatkite Classification

Dana Class:

30.2.8.1 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

(30.2)where (A B)2 XO4 Zq

(30.2.8)Dana Group

30.2.8.1 Kamchatkite KCu3OCl(SO4)2 P na2₁ mm2

Strunz Class:

VI/B.05-30 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/B - Waterfree sulfates [SO4]2- with unfamiliar anions. cations of medium size

VI/B.05 - Fedotovite - Klyuchevskite series

VI/B.05-10 Fedotovite K2Cu3(SO4)3O P 2₁/c 2/m

VI/B.05-20 Chlorothionite K2Cu(SO4)Cl2 P nma 2/m 2/m 2/m

VI/B.05-30 Kamchatkite KCu3OCl(SO4)2 P na2₁ mm2

VI/B.05-40 Piypite K2Cu2(SO4)2O I 4 4

VI/B.05-45 Alumoklyuchevskite K3Cu3AlO2(SO4)4 I2 2

VI/B.05-50 Klyuchevskite K3Cu3(Fe,Al)O2(SO4)4 Unk. Mono

VI/B.05-50* Klyuchevskite-Duplicate K3Cu3FeO2(SO4)4 I2/m, Im, or I2 Mono

Other Kamchatkite Information

References:

PHYS. PROP.(Am.Min.,Vol.75,p1210,1990) OPTIC PROP.(Am.Min.,Vol.75,p1210,1990)

See Also:

Links to other databases for Kamchatkite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Kamchatkite

KCu++3OCl(SO4)2
Dana No: 30.2.8.1 Strunz No: VI/B.05-30
Locality:

Notes: