Vonbezingite Mineral Data
General Vonbezingite Information
Chemical Formula:
Ca6Cu3(SO4)3(OH)12•2(H2O)
Composition:
Molecular Weight = 959.42 gm
Calcium 25.06 % Ca 35.07 % CaO
Copper 19.87 % Cu 24.87 % CuO
Hydrogen 1.68 % H 15.02 % H2 O
Sulfur 10.03 % S 25.04 % SO3
Oxygen 43.36 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Ca6 Cu3 (SO4 )3 (OH)12 •2(H2 O)
Environment:
Formed during a period of evaporation of surface or ground waters at ambient temperature and atmospheric pressure.
IMA Status:
Approved IMA 1991
Locality:
Wessels mine, near Kuruman, Cape Province, South Africa. Link to MinDat.org Location Data.
Name Origin:
Named for Karl-Ludwig von Bezing (1945� ), Austrian-South African mineral collector, for his contributions to knowledge of mineralogy of the Kalahari manganese field.
Name Pronunciation:
Vonbezingite + Pronunciation
Synonym:
ICSD 67674
IMA1991-031
PDF 47-1794
Vonbezingite Image
Images:
Vonbezingite
Comments: Dark blue, blocky crystals of vonbezingite on matirx.
Location: Kalahari Manganese District, Cape Province, South Africa.
Scale: Crystal size 0.7 cm.
© John Veevaert
Vonbezingite Crystallography
Axial Ratios:
a:b:c =1.0532:1:1.5366
Cell Dimensions:
a = 15.122, b = 14.358, c = 22.063, Z = 8; beta = 108.68° V = 4,538.01 Den(Calc)= 2.81
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21 /c
X Ray Diffraction:
By Intensity(I/Io ): 3.393(1), 3.12(0.85), 3.188(0.65),
Physical Properties of Vonbezingite
Cleavage:
None
Color:
Azure.
Density:
2.82
Diaphaneity:
Transparent
Hardness:
4 - Fluorite
Luster:
Vitreous (Glassy)
Streak:
light blue
Optical Properties of Vonbezingite
Gladstone-Dale:
CI meas = -0.017 (Superior) - where the CI = (1-KPDmeas /KC ) CI calc = -0.021 (Excellent) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2158,KPDmeas = 0.215,KC = 0.2113 Ncalc = 1.59 - 1.6
Optical Data:
Biaxial (-), a=1.59, b=1.61, g=1.619, bire=0.0290, 2V(Calc)=66, 2V(Meas)=65-67.
Calculated Properties of Vonbezingite
Electron Density:
Bulk Density (Electron Density)=2.82 gm/cc note: Specific Gravity of Vonbezingite =2.82 gm/cc.
Fermion Index:
Fermion Index = 0.0013010093 Boson Index = 0.9986989907
Photoelectric:
PEVonbezingite = 12.11 barns/electronU=PEVonbezingite x r Electron Density= 34.10 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Vonbezingite is Not Radioactive
Vonbezingite Classification
Dana Class:
31.05.01.01 (31) Hydrated Sulfates Containing Hydroxyl or Halogen
(31.05) where (A+ B++)3 (XO4) Zq�x(H2O)
(31.05.01) Dana Group
31.05.01.01 Vonbezingite Ca6Cu3(SO4)3(OH)12•2(H2O) P 21 /c 2/m
Strunz Class:
07.DD.65 07 - SULFATES (SELENATES, TELLURATES)
07.D - Sulfates (selenates, etc.) with additional anions, with H2O
07.DD -With only medium-sized cations; sheets of edge-sharing octahedra
07.DD.65 Vonbezingite Ca6Cu3(SO4)3(OH)12•2(H2O) P 21 /c 2/m
Other Vonbezingite Information
References:
NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.77,p1292-1300,1992) OPTIC PROP.(Am.Min.,Vol.77,p1292-1300,1992)
See Also:
Links to other databases for Vonbezingite :
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
15 - WWW-MINCRYST
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Vonbezingite
Ca6Cu3(SO4)3(OH)12•2(H2O)
Dana No: 31.05.01.01 Strunz No: 07.DD.65
Locality:
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