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Georgbokiite Mineral Data
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General Georgbokiite Information
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 Chemical Formula: |
Cu5O2(SeO3)2Cl2 |
| Composition: |
Molecular Weight = 674.55 gm |
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Copper 47.10 % Cu 53.03 % Cu2O |
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Selenium 23.41 % Se 32.90 % SeO2 |
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Chlorine 10.51 % Cl 10.51 % Cl |
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- %
Cl -2.37 % -O=Cl2 |
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Oxygen 18.97 % O |
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______ ______ |
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100.00 % 94.07 % = TOTAL OXIDE |
| Empirical Formula: |
Cu5O2(SeO3)2Cl2 |
| Environment: |
A product of fumarolic activity (Temperature 200 deg. C.). |
| IMA Status: |
Approved IMA 1996 (Dana # Added) |
| Locality: |
The cone of the South break of the Large Tolbachik fissure eruption (1975-1981), Kamchatka Peninsula, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
For Prof. Dr. Georgiy Borisovich Bokii (1909-) for his contributions to crystal chemistry and mineralogy. |
| Synonym: |
ICSD 89637 |
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IMA1996-015 |
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PDF 51-1563 |
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Georgbokiite Image |
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Images:
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Georgbokiite
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 |
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Georgbokiite Crystallography
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| Axial Ratios: |
a:b:c =0.4387:1:0.4049 |
| Cell Dimensions: |
a = 6.045, b = 13.778, c = 5.579, Z = 2; beta = 95.76° V = 462.32 Den(Calc)= 4.85 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c |
| 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), |
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Physical Properties of Georgbokiite
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| Cleavage: |
{010} Perfect, {100} Very Good |
| Color: |
Chestnut brown, Dark brown. |
| Diaphaneity: |
Translucent |
| Fracture: |
Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite). |
| Habit: |
Euhedral Crystals - Occurs as well-formed crystals showing good external form. |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Hardness: |
4 - Fluorite |
| Luster: |
Vitreous - Adamantine |
| Streak: |
yellowish brown |
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Optical Properties of Georgbokiite
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| Gladstone-Dale: |
CI calc= -0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2282,KC= 0.2215
Ncalc = 2.07 |
| Optical Data: |
Biaxial (-), a=2.06, b=2.11, g=2.15, bire=0.0900 |
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Calculated Properties of Georgbokiite
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| Electron Density: |
Bulk Density (Electron Density)=4.47 gm/cc
note: Specific Gravity of Georgbokiite =4.85 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEGeorgbokiite = 40.09 barns/electron
U=PEGeorgbokiite x rElectron Density= 179.28 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Georgbokiite is Not Radioactive |
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Georgbokiite Classification
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| Dana Class: |
34.06.07.02 (34)Selenites - Tellurites - Sulfites |
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(34.06)Dana Type |
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(34.06.07)Chloromenite Group |
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34.06.07.01 Chloromenite! Cu9O2(SeO3)4Cl6 I2/m 2/m |
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34.06.07.02 Georgbokiite! Cu5O2(SeO3)2Cl2 P 21/c 2/m |
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34.06.07.03 Parageorgbokiite! Cu5O2(SeO3)2Cl2 P 21/c 2/m |
| Strunz Class: |
04.JG.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.J - Arsenites, Antimonites, Bismuthites, Sulfites, |
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04.JG -Selenites with additional anions, without H2O |
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04.JG.05 Georgbokiite! Cu5O2(SeO3)2Cl2 P 21/c 2/m |
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04.JG.05 Parageorgbokiite! Cu5O2(SeO3)2Cl2 P 21/c 2/m |
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Other Georgbokiite Information
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| References: |
NAME( MinRec V 31, No. 2) PHYS. PROP.(MinRec, V 31, No. 2) OPTIC PROP.(MinRec, V 31, No. 2) |
| 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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Print or Cut-and-Paste your Georgbokiite Specimen Label here :
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Georgbokiite
Cu5O2(SeO3)2Cl2
Dana No: 34.06.07.02 Strunz No: 04.JG.05
Locality:
Notes:
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