Mineralogy Database

Fedotovite Mineral Data

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General Fedotovite Information

Help on Chemical  Formula: Chemical Formula: K2Cu++3(SO4)3O
Help on Composition: Composition: Molecular Weight = 573.02 gm
   Potassium  13.65 %  K    16.44 % K2O
   Copper     33.27 %  Cu   41.65 % CuO
   Sulfur     16.79 %  S    41.92 % SO3
   Oxygen     36.30 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2Cu3(SO4)3O
Help on IMA Status: IMA Status: Approved IMA 1988
Help on Locality: Locality: Great Tolbachik fissure eruption, Kamchatka, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for S. A. Fedotov (1931-), Russian geologist.
Help on Name Pronunciation: Name Pronunciation: Fedotovite + Pronunciation Say FEDOTOVITE
Help on Synonym: Synonym: ICSD 71792
  PDF 45-1405

Fedotovite Image

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  Dolerophanite   Chalcanthite   Fedotovite

Comments: Brown crystals of dolerophanite with blue chalcanthite and green fedotovite.
Location: Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

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  Fedotovite   Chalcanthite

Comments: Green fedotovite with pale blue chalcanthite.
Location: Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Fedotovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.0126:1:1.4973
Help on Cell Dimensions: Cell Dimensions: a = 19.06, b = 9.47, c = 14.18, Z = 8; beta = 112.36° V = 2,367.02 Den(Calc)= 3.22
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.83(1), 2.943(0.2), 4.21(0.1),4.41(0.1), 4.54(0.1), 6.54(0.1), 6.59(0.1), 2.844(0.1),

Physical Properties of Fedotovite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Blue green, Emerald green.
Help on Density: Density: 3.205
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: light green

Optical Properties of Fedotovite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.059 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.054 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1867,KPDmeas= 0.1876,KC= 0.1772
Ncalc = 1.57
Help on Optical Data: Optical Data: Biaxial (+), a=1.577, b=1.594, g=1.633, bire=0.0560, 2V(Calc)=70, 2V(Meas)=68.

Calculated Properties of Fedotovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.11 gm/cc
note: Specific Gravity of Fedotovite =3.22 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0014496839
Boson Index = 0.9985503161
Help on Photoelectric: Photoelectric: PEFedotovite = 16.92 barns/electron
U=PEFedotovite x relectron= 52.68 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 190.37 (Gamma Ray American Petroleum Institute Units)
Concentration of Fedotovite per GRapi unit = 0.53 (%)

Estimated Radioactivity from Fedotovite - barely detectable


Fedotovite Classification

Help on  Dana Class: Dana Class: (30)Anhydrous Sulfates Containing Hydroxyl or Halogen
  (30.03)with miscellaneous formulae
  (30.03.04)Dana Group Fedotovite K2Cu3(SO4)3O P 21/c 2/m
Help on  Strunz Class: Strunz Class: 07.BC.30 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BC -With medium-sized and large cations
07.BC.30 Euchlorine KNaCu3(SO4)3O C 2/c 2/m
07.BC.30 Fedotovite K2Cu3(SO4)3O P 21/c 2/m

Other Fedotovite Information

Help on References: References: PHYS. PROP.(Am.Min.,Vol.75,p241,1990) OPTIC PROP.(Am.Min.,Vol.75,p241,1990)
Help on See Also: See Also: Links to other databases for Fedotovite :
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.30





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