Vonbezingite Mineral Data

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)

IMA Status:

Approved IMA 1991

Locality:

Link to MinDat.org Location Data.

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 - PrismaticH-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),

Crystal Structure:

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Dai Y S , Harlow G E , American Mineralogist , 77 (1992) p.1292-1300, Description and crystal structure of vonbezingite, a new Ca-Cu-SO4-H2O mineral, from the Kalahari manganese field, South Africa

Physical Properties of Vonbezingite

Cleavage:

None

Color:

Azure.

Density:

2.82

Diaphaniety:

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

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:

r_electron=2.82 gm/cc
note: r_Vonbezingite=2.82 gm/cc.

Fermion Index

Fermion Index = 0.0013
Boson Index = 0.9987

Photoelectric:

PE_Vonbezingite= 12.11 barns/electron
U=PE_Vonbezingite x r_electron= 34.10 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Vonbezingite is Not Radioactive

Vonbezingite Classification

Dana Class:

31.5.1.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.5)where (A+ B++)3 (XO4) Zq·x(H2O)

(31.5.1)Dana Group

31.5.1.1 Vonbezingite Ca6Cu3(SO4)3(OH)12·2(H2O) P 2₁/c 2/m

Strunz Class:

VI/D.18-40 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium and very big size

VI/D.18 - Kainite - Natrochalcite series

VI/D.18-10 Kainite MgSO4·KCl·3(H2O) C 2/m 2/m

VI/D.18-20 Uklonskovite NaMg(SO4)F·2(H2O) P 2₁/m 2/m

VI/D.18-30 Natrochalcite NaCu2(SO4)2(OH)·(H2O) I2/m 2/m

VI/D.18-40 Vonbezingite Ca6Cu3(SO4)3(OH)12·2(H2O) P 2₁/c 2/m

Other Vonbezingite Information

References:

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Vonbezingite

Ca6Cu3(SO4)3(OH)12·2(H2O)
Dana No: 31.5.1.1 Strunz No: VI/D.18-40
Locality:

Notes: