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Klyuchevskite Mineral Data

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General Klyuchevskite Information

Help on Chemical  Formula: Chemical Formula: K3Cu3(Fe+++,Al)O2(SO4)4
Help on Composition: Composition: Molecular Weight = 765.60 gm
   Potassium  15.32 %  K    18.46 % K2O
   Aluminum    1.76 %  Al    3.33 % Al2O3
   Iron        3.65 %  Fe    5.21 % Fe2O3
   Copper     24.90 %  Cu   31.17 % CuO
   Sulfur     16.75 %  S    41.83 % SO3
   Oxygen     37.62 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K3Cu3Fe3+0.5Al0.5O2(SO4)4
Help on Environment: Environment: Volcanic fumaroles.
Help on IMA Status: IMA Status: Approved IMA 1989
Help on Locality: Locality: Great Tolbachik fissure eruption, Kamchatka, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality.
Help on Name Pronunciation: Name Pronunciation: Klyuchevskite + Pronunciation Say KLYUCHEVSKITE
Help on Synonym: Synonym: ICSD 67698
  PDF 41-1463

Klyuchevskite Image

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  Klyuchevskite   Klyuchevskite-Duplicate

Comments: Clusters of dark green radiating prismatic klyuchevskite crystals associated with langbeinite, co-type sample. Klyuchevskite-duplicate is the same mineral with different Dana numbers.
Location: Yadevitaya fumarole, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: See Image.
© Rruff Database

Klyuchevskite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.6868:1:3.7324
Help on Cell Dimensions: Cell Dimensions: a = 18.412, b = 4.994, c = 18.64, Z = 4; beta = 101.5° V = 1,679.53 Den(Calc)= 3.03
Help on Crystal System: Crystal System: Monoclinic Space Group: Unk.
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.03(1), 3.76(0.6), 7.2(0.4),3.41(0.3), 4.5(0.3), 3.45(0.2), 3.68(0.2),

Physical Properties of Klyuchevskite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Dark green, Olive green.
Help on Density: Density: 3 - 3.15, Average = 3.07
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: green light

Optical Properties of Klyuchevskite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.049 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1957,KPDmeas= 0.1928,KC= 0.1865
Ncalc = 1.56 - 1.59
Help on Optical Data: Optical Data: Biaxial (-), a=1.549, b=1.55, g=1.68, bire=0.1310
Help on Pleochroism (x): Pleochroism (x): olive.
Help on Pleochroism (y): Pleochroism (y): green.
Help on Pleochroism (z): Pleochroism (z): dark olive.

Calculated Properties of Klyuchevskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.98 gm/cc
note: Specific Gravity of Klyuchevskite =3.08 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0022286672
Boson Index = 0.9977713328
Help on Photoelectric: Photoelectric: PEKlyuchevskite = 14.54 barns/electron
U=PEKlyuchevskite x relectron= 43.40 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 214.52 (Gamma Ray American Petroleum Institute Units)
Concentration of Klyuchevskite per GRapi unit = 0.47 (%)

Estimated Radioactivity from Klyuchevskite - barely detectable


Klyuchevskite Classification

Help on  Dana Class: Dana Class: (28)Anhydrous Acid and Sulfates
  (28.04)with miscellaneous formulae
  (28.04.06)Klyuchevskite Group Klyuchevskite K3Cu3(Fe,Al)O2(SO4)4 Unk. Mono Alumoklyuchevskite K3Cu3AlO2(SO4)4 I2 2
Help on  Strunz Class: Strunz Class: 07.BC.45 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BC -With medium-sized and large cations
07.BC.45 Alumoklyuchevskite K3Cu3AlO2(SO4)4 I2 2
07.BC.45 Klyuchevskite-Duplicate K3Cu3FeO2(SO4)4 I2/m, Im, or I2 Mono
07.BC.45 Klyuchevskite K3Cu3(Fe,Al)O2(SO4)4 Unk. Mono

Other Klyuchevskite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Klyuchevskite :
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 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 07.BC.45





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