Thometzekite Mineral Data

Advertisment

Adamsminerals.com- Online mineral store front for mineral collectors

A Bijoux.com is an online store specialized in the sale on the internet of precious stones , gems , minerals and jewels for individuals and professionals

McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

General Thometzekite Information

Chemical Formula:

Pb(Cu,Zn)2(AsO4)2•2(H2O)

Composition:

Molecular Weight = 649.08 gm

Zinc 5.04 % Zn 6.27 % ZnO

Copper 14.69 % Cu 18.38 % CuO

Arsenic 23.09 % As 35.41 % As₂O₅

Hydrogen 0.62 % H 5.55 % H₂O

Lead 31.92 % Pb 34.39 % PbO

Oxygen 24.65 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

PbCu_1.5Zn_0.5(AsO₄)₂•2(H₂O)

Environment:

Rare secondary mineral from an oxidized zone in a dolostone-hosted hydrothermal polymetallic ore deposit

IMA Status:

Approved IMA 1985

Locality:

From Tsumeb, Namibia. Link to MinDat.org Location Data.

Name Origin:

Named for Wilhelm Thometzek, former General Manager of the Tsumeb mining company.

Name Pronunciation:

Thometzekite + Pronunciation

Thometzekite Image

Images:

Thometzekite

Comments: Pale olive-green colored thometzekite crusts on quartz.
Location: Moldovo. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Thometzekite Crystallography

Axial Ratios:

a:b:c =1.4392:1:1.211

Cell Dimensions:

a = 9.112, b = 6.331, c = 7.667, Z = 2; beta = 116.74° V = 394.99 Den(Calc)= 5.46

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 4.688(1), 3.273(0.88), 2.865(0.7),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Krause W , Belendorff K , Bernhardt H J , McCammon C A , Effenberger H , Mikenda W , European Journal of Mineralogy , 10 (1998) p.179-206, Crystal chemistry of the tsumcorite-group minerals. New data on ferrilotharmeyerite,, tsumcorite, thometzekite, mounanaite, helmutwinklerite, and a redefinition of gartrellite

Physical Properties of Thometzekite

Color:

Bluish green, Green.

Hardness:

4-5 - Fluorite-Apatite

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Thometzekite

Gladstone-Dale:

CI calc= 0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1612,KC= 0.1631
Ncalc = 1.89

Optical Data:

Biaxial (+), a=1.85, b=1.87, g=1.92, bire=0.0700, 2V(Calc)=68, 2V(Meas)=70.

Calculated Properties of Thometzekite

Electron Density:

Bulk Density (Electron Density)=4.89 gm/cc
note: Specific Gravity of Thometzekite =5.46 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

PE_Thometzekite= 573.77 barns/electron
U=PE_Thometzekite x rElectron Density=2,804.16 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Thometzekite is Not Radioactive

Thometzekite Classification

Dana Class:

40.02.09.03 (40)Hydrated Phosphates, etc

(40.02)where A++ (B++)2 (XO4) · x(H2O)

(40.02.09)Helmutwinklerite Subgroup

40.02.09.01 Tsumcorite PbZnFe(AsO4)2•(H2O) C 2/m 2/m

40.02.09.02 Helmutwinklerite PbZn2(AsO4)2•2(H2O) P1 1

40.02.09.03 Thometzekite Pb(Cu,Zn)2(AsO4)2•2(H2O) C 2/m 2/m

40.02.09.04 Mawbyite Pb(FeZn)2(AsO4)2(OH,H2O)2 C 2/m 2/m

40.02.09.05 Rappoldite! Pb(Co,Ni,Zn,)2(AsO4)2•2(H2O) P1 1

40.02.09.06 Schneebergite! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

40.02.09.07 Nickelschneebergite! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

40.02.09.08 Cobalttsumcorite! Pb(Co,Fe)2(AsO4)2(OH,H2O)2 C 2/m 2/m

Strunz Class:

08.CG.15 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CG -With large and medium-sized cations, RO4:H2O = 1:1

08.CG.15 Cobaltlotharmeyerite! Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Ferrilotharmeyerite Ca(Zn,Cu)(Fe,Zn)(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Cabalzarite! Ca(Mg,Al,Fe)2(AsO4)2(H2O,OH)2 C 2/m 2/m

08.CG.15 Mawbyite Pb(FeZn)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Lotharmeyerite CaZnMn(AsO3OH)4(OH)3 C 2/m,C 2,Cm Mono

08.CG.15 Mounanaite PbFe2(VO4)2(OH)2 P1 1

08.CG.15 Tsumcorite PbZnFe(AsO4)2•(H2O) C 2/m 2/m

08.CG.15 Thometzekite Pb(Cu,Zn)2(AsO4)2•2(H2O) C 2/m 2/m

08.CG.15 Cobalttsumcorite! Pb(Co,Fe)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Manganlotharmeyerite! Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Nickellotharmeyerite! Ca(Ni,Fe,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Krettnichite! PbMn2(VO4)2(OH)2 C 2/m 2/m

08.CG.15 Schneebergite! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Nickelschneebergite! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

Other Thometzekite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Thometzekite :
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

Search for Thometzekite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Thometzekite :

A Bijoux Google Search for Thometzekite
Adam's Minerals Google Search for Thometzekite
Cape Minerals Google Search for Thometzekite
Dakota Matrix Minerals Google Search for Thometzekite
Excalibur Mineral Corp. Google Search for Thometzekite
Exceptional Minerals Google Search for Thometzekite
John Betts Fine Minerals Search for Thometzekite
McDougall Minerals Google Search for Thometzekite
Mineral News Website Link
Rock and Mineral Shows Google Search for Thometzekite
Weinrich Minerals, Inc. Google Search for Thometzekite

Ask about Thometzekite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Thometzekite

Pb(Cu,Zn)2(AsO4)2•2(H2O)
Dana No: 40.02.09.03 Strunz No: 08.CG.15
Locality:

Notes: