Mineralogy Database

Wickenburgite Mineral Data

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General Wickenburgite Information

Help on Chemical  Formula: Chemical Formula: Pb3CaAl2Si10O27•4(H2O)
Help on Composition: Composition: Molecular Weight = 1,500.54 gm
   Calcium    2.67 %  Ca    3.74 % CaO
   Aluminum   3.60 %  Al    6.79 % Al2O3
   Silicon   18.72 %  Si   40.04 % SiO2
   Hydrogen   0.54 %  H     4.80 % H2O
   Lead      41.43 %  Pb   44.62 % PbO
   Oxygen    33.05 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb3CaAl2Si10O27•4(H2O)
Help on IMA Status: IMA Status: Approved IMA 1968
Help on Locality: Locality: near Wichenburg, Maricopa County, Arizona. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Wickenburgite + Pronunciation Say WICKENBURGITE
Help on Synonym: Synonym: ICSD 79154
  PDF 21-148

Wickenburgite Image

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Comments: Transparent colorless wickenburgite microcrystals.
Location: Wickenburg, Maricopa County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Wickenburgite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.36002
Help on Cell Dimensions: Cell Dimensions: a = 8.555, c = 20.19, Z = 2; V = 1,279.70 Den(Calc)= 3.89
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: P 31c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.1(1), 3.26(0.8), 3.93(0.6),

Physical Properties of Wickenburgite

Help on Cleavage: Cleavage: {???} Indistinct, {0001} Distinct
Help on Color: Color: Colorless, White, Pink.
Help on Density: Density: 3.85
Help on Hardness: Hardness: 5 - Apatite
Help on Luminescence: Luminescence: Fluorescent, Short UV=dull orange.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Wickenburgite

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): colorless.
Help on Gladstone-Dale: 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
Help on Optical Data: Optical Data: Uniaxial (-), e=1.648, w=1.6918, bire=0.0438.

Calculated Properties of Wickenburgite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.53 gm/cc
note: Specific Gravity of Wickenburgite =3.85 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PEWickenburgite = 694.74 barns/electron
U=PEWickenburgite x rElectron Density=2,452.75 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wickenburgite is Not Radioactive

Wickenburgite Classification

Help on  Dana Class: Dana Class: (74)Phyllosilicate Modulated Layers
  (74.02)Dana Type
  (74.02.01)Dana Group Wickenburgite Pb3CaAl2Si10O27•4(H2O) P 31c 3m
Help on  Strunz Class: 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 31c 3m

Other Wickenburgite Information

Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990, AmMin v 89, p 471) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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
16 - YupRocks

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Dana No: Strunz No: 09.EG.55





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