Wickenburgite Mineral Data
General Wickenburgite Information
Chemical Formula:
Pb3CaAl2Si10O27•4(H2O)
Composition:
Molecular Weight = 1,500.54 gm
Calcium 2.67 % Ca 3.74 % CaO
Aluminum 3.60 % Al 6.79 % Al2 O3
Silicon 18.72 % Si 40.04 % SiO2
Hydrogen 0.54 % H 4.80 % H2 O
Lead 41.43 % Pb 44.62 % PbO
Oxygen 33.05 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Pb3 CaAl2 Si10 O27 •4(H2 O)
IMA Status:
Approved IMA 1968
Locality:
near Wichenburg, Maricopa County, Arizona. Link to MinDat.org Location Data.
Name Origin:
Named for the locality.
Name Pronunciation:
Wickenburgite + Pronunciation
Synonym:
ICSD 79154
PDF 21-148
Wickenburgite Image
Images:
Wickenburgite Crystallography
Axial Ratios:
a:c = 1:2.36002
Cell Dimensions:
a = 8.555, c = 20.19, Z = 2; V = 1,279.70 Den(Calc)= 3.89
Crystal System:
Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: P 31 c
X Ray Diffraction:
By Intensity(I/Io ): 10.1(1), 3.26(0.8), 3.93(0.6),
Physical Properties of Wickenburgite
Cleavage:
{???} Indistinct, {0001} Distinct
Color:
Colorless, White, Pink.
Density:
3.85
Hardness:
5 - Apatite
Luminescence:
Fluorescent, Short UV=dull orange.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Wickenburgite
Dichroism (e):
colorless.
Dichroism (w):
colorless.
Gladstone-Dale:
CI meas = 0.038 (Excellent) - where the CI = (1-KPDmeas /KC ) CI calc = 0.048 (Good) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.1722,KPDmeas = 0.174,KC = 0.1809 Ncalc = 1.7
Optical Data:
Uniaxial (-), e=1.648, w=1.6918, bire=0.0438.
Calculated Properties of Wickenburgite
Electron Density:
Bulk Density (Electron Density)=3.53 gm/cc note: Specific Gravity of Wickenburgite =3.85 gm/cc.
Fermion Index:
Fermion Index = 0.1 Boson Index = 0.9
Photoelectric:
PEWickenburgite = 694.74 barns/electronU=PEWickenburgite x r Electron Density=2,452.75 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Wickenburgite is Not Radioactive
Wickenburgite Classification
Dana Class:
74.02.01.01 (74) Phyllosilicate Modulated Layers
(74.02) Dana Type
(74.02.01) Dana Group
74.02.01.01 Wickenburgite Pb3CaAl2Si10O27•4(H2O) P 31 c 3m
Strunz Class:
09.EG.55 09 - SILICATES (Germanates)
09.E - Phyllosilicates
09.EG -Double nets with 6-membered and larger rings
09.EG.55 Wickenburgite Pb3CaAl2Si10O27•4(H2O) P 31 c 3m
Other Wickenburgite Information
References:
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990, AmMin v 89, p 471) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Wickenburgite :
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
16 - YupRocks
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Wickenburgite
Pb3CaAl2Si10O27•4(H2O)
Dana No: 74.02.01.01 Strunz No: 09.EG.55
Locality:
Notes:
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