Mineralogy Database

Georgbokiite Mineral Data

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General Georgbokiite Information

Help on Chemical  Formula: Chemical Formula: Cu5O2(SeO3)2Cl2
Help on Composition: Composition: Molecular Weight = 674.55 gm
   Copper    47.10 %  Cu   53.03 % Cu2O
   Selenium  23.41 %  Se   32.90 % SeO2
   Chlorine  10.51 %  Cl   10.51 % Cl
               -   %   Cl   -2.37 % -O=Cl2   
   Oxygen    18.97 %  O
            ______        ______ 
            100.00 %       94.07 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu5O2(SeO3)2Cl2
Help on Environment: Environment: A product of fumarolic activity (Temperature 200 deg. C.).
Help on IMA Status: IMA Status: Approved IMA 1996 (Dana # Added)
Help on Locality: Locality: The cone of the South break of the Large Tolbachik fissure eruption (1975-1981), Kamchatka Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Prof. Dr. Georgiy Borisovich Bokii (1909-) for his contributions to crystal chemistry and mineralogy.
Help on Synonym: Synonym: ICSD 89637
  PDF 51-1563

Georgbokiite Image

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Comments: Deep reddish brown polished fragment of georgbokiite embedded in epoxy, co-type material.
Location: Tolbachik Volcano, Kamchatka Peninsula, Russia. Scale: Picture Size 300 µm.
© Rruff Database

Georgbokiite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4387:1:0.4049
Help on Cell Dimensions: Cell Dimensions: a = 6.045, b = 13.778, c = 5.579, Z = 2; beta = 95.76° V = 462.32 Den(Calc)= 4.85
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): 2.99(1), 2.296(0.95), 2.963(0.94),6.88(0.68), 2.566(0.67), 5.511(0.5),

Physical Properties of Georgbokiite

Help on Cleavage: Cleavage: {010} Perfect, {100} Very Good
Help on Color: Color: Chestnut brown, Dark brown.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: yellowish brown

Optical Properties of Georgbokiite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2282,KC= 0.2215
Ncalc = 2.07
Help on Optical Data: Optical Data: Biaxial (-), a=2.06, b=2.11, g=2.15, bire=0.0900

Calculated Properties of Georgbokiite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.47 gm/cc
note: Specific Gravity of Georgbokiite =4.85 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGeorgbokiite = 40.09 barns/electron
U=PEGeorgbokiite x rElectron Density= 179.28 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Georgbokiite is Not Radioactive

Georgbokiite Classification

Help on  Dana Class: Dana Class: (34)Selenites - Tellurites - Sulfites
  (34.06)Dana Type
  (34.06.07)Chloromenite Group Chloromenite! Cu9O2(SeO3)4Cl6 I2/m 2/m Georgbokiite! Cu5O2(SeO3)2Cl2 P 21/c 2/m Parageorgbokiite! Cu5O2(SeO3)2Cl2 P 21/c 2/m
Help on  Strunz Class: Strunz Class: 04.JG.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JG -Selenites with additional anions, without H2O
04.JG.05 Georgbokiite! Cu5O2(SeO3)2Cl2 P 21/c 2/m
04.JG.05 Parageorgbokiite! Cu5O2(SeO3)2Cl2 P 21/c 2/m

Other Georgbokiite Information

Help on References: References: NAME( MinRec V 31, No. 2) PHYS. PROP.(MinRec, V 31, No. 2) OPTIC PROP.(MinRec, V 31, No. 2)
Help on See Also: See Also: Links to other databases for Georgbokiite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 04.JG.05





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