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Alumoklyuchevskite Mineral Data

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General Alumoklyuchevskite Information

Help on Chemical  Formula: Chemical Formula: K3Cu3AlO2(SO4)4
Help on Composition: Composition: Molecular Weight = 751.17 gm
   Potassium  15.62 %  K    18.81 % K2O
   Aluminum    3.59 %  Al    6.79 % Al2O3
   Copper     25.38 %  Cu   31.77 % CuO
   Sulfur     17.08 %  S    42.63 % SO3
   Oxygen     38.34 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K3Cu3AlO2(SO4)4
Help on Environment: Environment: A volcanic exhalation.
Help on IMA Status: IMA Status: Approved IMA 1995
Help on Locality: Locality: The second cone of the Northern Breakthrough of the Main Tolbachik fracture eruption, Kamchatka, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the aluminum dominant analog of klyuchevskite.
Help on Synonym: Synonym: IMA1993-004

Alumoklyuchevskite Image

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Comments: Very small olive-greenish prismatic crystals of alumoklyuchevskite.
Location: Tolbachik volcano, Kamchatka, Russia. Scale: Sample size 1.8 x 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

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  Alumoklyuchevskite   Vergasovaite

Comments: Green blebs to prismatic or needle-like crystals of alumoklyuchevskite associated with orange vergasovaite, co-type material.
Location: Main fracture, N breakthrough, Tolbachik Volcano, Kamchatka Peninsula, Russia. Scale: See Image.
© Rruff Database

Alumoklyuchevskite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.5866:1:3.6368
Help on Cell Dimensions: Cell Dimensions: a = 18.432, b = 5.139, c = 18.69, Z = 4; beta = 101.12° V = 1,737.12 Den(Calc)= 2.87
Help on Crystal System: Crystal System: Monoclinic - Sphenoidal H-M Symbol (2) Space Group: I2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.04(1), 9.15(0.84), 3.781(0.37),

Physical Properties of Alumoklyuchevskite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Dark green.
Help on Density: Density: 3.1
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light green

Optical Properties of Alumoklyuchevskite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.115 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.201,KPDmeas= 0.1861,KC= 0.1804
Ncalc = 1.52 - 1.56
Help on Optical Data: Optical Data: Biaxial (+), a=1.542, b=1.548, g=1.641, bire=0.0990, 2V(Calc)=30, 2V(Meas)=30.
Help on Pleochroism (x): Pleochroism (x): light green.
Help on Pleochroism (y): Pleochroism (y): grayish green.
Help on Pleochroism (z): Pleochroism (z): dark green.

Calculated Properties of Alumoklyuchevskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.01 gm/cc
note: Specific Gravity of Alumoklyuchevskite =3.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0014834108
Boson Index = 0.9985165892
Help on Photoelectric: Photoelectric: PEAlumoklyuchevskite = 13.74 barns/electron
U=PEAlumoklyuchevskite x relectron= 41.40 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 218.94 (Gamma Ray American Petroleum Institute Units)
Concentration of Alumoklyuchevskite per GRapi unit = 0.46 (%)

Estimated Radioactivity from Alumoklyuchevskite - barely detectable


Alumoklyuchevskite 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 Alumoklyuchevskite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Alumoklyuchevskite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 07.BC.45





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