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 % H₂O

Sulfur 10.03 % S 25.04 % SO₃

Oxygen 43.36 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₆Cu₃(SO₄)₃(OH)₁₂•2(H₂O)

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 (1945ï¿½ ), 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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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:

PE_Vonbezingite= 12.11 barns/electron
U=PE_Vonbezingite x rElectron 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) Zqï¿½x(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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Print or Cut-and-Paste your Vonbezingite Specimen Label here :

Vonbezingite

Ca6Cu3(SO4)3(OH)12•2(H2O)
Dana No: 31.05.01.01 Strunz No: 07.DD.65
Locality:

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