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 % 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

Empirical Formula:

Pb₃CaAl₂Si₁₀O₂₇•4(H₂O)

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

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

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 3₁c

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

By Intensity(I/I_o): 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:

PE_{Wickenburgite}= 694.74 barns/electron
U=PE_{Wickenburgite} x rElectron 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 3₁c 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 3₁c 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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