Prewittite Mineral Data

General Prewittite Information

Chemical Formula:

KPb1.5ZnCu6O2(SeO3)2Cl10

Composition:

Molecular Weight = 1,437.01 gm

Potassium 2.72 % K 3.28 % K₂O

Zinc 4.55 % Zn 5.66 % ZnO

Copper 26.53 % Cu 29.87 % Cu₂O

Lead 21.63 % Pb 22.46 % Pb₂O

Selenium 10.99 % Se 15.44 % SeO₂

Chlorine 24.67 % Cl 24.67 % Cl

- % Cl -5.57 % -O=Cl₂

Oxygen 8.91 % O

______ ______

100.00 % 95.82 % = TOTAL OXIDE

Empirical Formula:

KPb_1.5ZnCu₆O₂(SeO₃)₂Cl₁₀

Environment:

New structure type

IMA Status:

Proposed IMA 2002 (Dana # Added)

Locality:

Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals, Nomenclature and Classification (CNMNC)

Synonym:

IMA2002-041

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Prewittite Crystallography

Axial Ratios:

a:b:c =0.4703:1:0.6805

Cell Dimensions:

a = 9.132, b = 19.415, c = 13.213, Z = 4; V = 2,342.64 Den(Calc)= 4.07

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnnm

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

By Intensity(I/I_o): 3.66(1), 4.11(0.9), 8.26(0.7),7.63(0.6), 2.887(0.5), 2.642(0.4), 2.996(0.4),

Physical Properties of Prewittite

Color:

Olive green.

Diaphaneity:

Transparent

Luster:

Vitreous (Glassy)

Optical Properties of Prewittite

Optical Data:

Biaxial (-)

NCalc= 1.79 - from Gladstone-Dale relationship (KC = 0.1934) where Ncalc=Dcalc*KC+1

Calculated Properties of Prewittite

Electron Density:

Bulk Density (Electron Density)=3.67 gm/cc
note: Specific Gravity of Prewittite =4.07 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Prewittite= 393.54 barns/electron
U=PE_Prewittite x r_electron=1,444.53 barns/cc.

Radioactivity:

GRapi = 35.39 (Gamma Ray American Petroleum Institute Units)
Concentration of Prewittite per GRapi unit = 2.83 (%)

Estimated Radioactivity from Prewittite - barely detectable

Prewittite Classification

Dana Class:

34.06.09.01 (34)Selenites - Tellurites - Sulfites

(34.06)Dana Type

(34.06.09)Dana Group

34.06.09.01 Prewittite! KPb1.5ZnCu6O2(SeO3)2Cl10 Pnnm 2/m 2/m 2/m

Strunz Class:

04.JG. 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.J - Arsenites, Antimonites, Bismuthites, Sulfites,

04.JG -Selenites with additional anions, without H2O

04.JG. Prewittite! KPb1.5ZnCu6O2(SeO3)2Cl10 Pnnm 2/m 2/m 2/m

Other Prewittite Information

See Also:

Links to other databases for Prewittite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Prewittite Specimen Label here :

Prewittite

KPb1.5ZnCu6O2(SeO3)2Cl10
Dana No: 34.06.09.01 Strunz No: 04.JG.
Locality:

Notes: