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Thometzekite Mineral Data
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General Thometzekite Information
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 Chemical Formula: |
Pb(Cu,Zn)2(AsO4)2•2(H2O) |
| Composition: |
Molecular Weight = 649.08 gm |
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Zinc 5.04 % Zn 6.27 % ZnO |
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Copper 14.69 % Cu 18.38 % CuO |
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Arsenic 23.09 % As 35.41 % As2O5 |
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Hydrogen 0.62 % H 5.55 % H2O |
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Lead 31.92 % Pb 34.39 % PbO |
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Oxygen 24.65 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
PbCu1.5Zn0.5(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  |
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Thometzekite Image |
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Images:
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Thometzekite Crystallography
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| 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 - Prismatic H-M Symbol (2/m) Space Group: C 2/m |
| X Ray Diffraction: |
By Intensity(I/Io): 4.688(1), 3.273(0.88), 2.865(0.7), |
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Physical Properties of Thometzekite
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| Color: |
Bluish green, Green. |
| Hardness: |
4-5 - Fluorite-Apatite |
| Luster: |
Earthy (Dull) |
| Streak: |
white |
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Optical Properties of Thometzekite
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| 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. |
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Calculated Properties of Thometzekite
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| Electron Density: |
Bulk Density (Electron Density)=4.89 gm/cc
note: Specific Gravity of Thometzekite =5.46 gm/cc.
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| Fermion Index: |
Fermion Index = 0.07
Boson Index = 0.93 |
| Photoelectric: |
PEThometzekite = 573.77 barns/electron
U=PEThometzekite x rElectron Density=2,804.16 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Thometzekite is Not Radioactive |
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Thometzekite Classification
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| Dana Class: |
40.02.09.03 (40)Hydrated Phosphates, etc |
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(40.02)where A++ (B++)2 (XO4) � x(H2O) |
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(40.02.09)Helmutwinklerite Subgroup |
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40.02.09.01 Tsumcorite PbZnFe(AsO4)2•(H2O) C 2/m 2/m |
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40.02.09.02 Helmutwinklerite PbZn2(AsO4)2•2(H2O) P1 1 |
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40.02.09.03 Thometzekite Pb(Cu,Zn)2(AsO4)2•2(H2O) C 2/m 2/m |
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40.02.09.04 Mawbyite Pb(FeZn)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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40.02.09.05 Rappoldite! Pb(Co,Ni,Zn,)2(AsO4)2•2(H2O) P1 1 |
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40.02.09.06 Schneebergite! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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40.02.09.07 Nickelschneebergite! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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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 |
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08.C - Phosphates without Additional Anions, with H2O |
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08.CG -With large and medium-sized cations, RO4:H2O = 1:1 |
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08.CG.15 Cobaltlotharmeyerite! Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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08.CG.15 Ferrilotharmeyerite Ca(Zn,Cu)(Fe,Zn)(AsO4)2(OH,H2O)2 C 2/m 2/m |
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08.CG.15 Cabalzarite! Ca(Mg,Al,Fe)2(AsO4)2(H2O,OH)2 C 2/m 2/m |
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08.CG.15 Mawbyite Pb(FeZn)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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08.CG.15 Lotharmeyerite CaZnMn(AsO3OH)4(OH)3 C 2/m,C 2,Cm Mono |
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08.CG.15 Mounanaite PbFe2(VO4)2(OH)2 P1 1 |
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08.CG.15 Tsumcorite PbZnFe(AsO4)2•(H2O) C 2/m 2/m |
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08.CG.15 Thometzekite Pb(Cu,Zn)2(AsO4)2•2(H2O) C 2/m 2/m |
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08.CG.15 Cobalttsumcorite! Pb(Co,Fe)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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08.CG.15 Manganlotharmeyerite! Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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08.CG.15 Nickellotharmeyerite! Ca(Ni,Fe,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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08.CG.15 Krettnichite! PbMn2(VO4)2(OH)2 C 2/m 2/m |
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08.CG.15 Schneebergite! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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08.CG.15 Nickelschneebergite! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m |
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Other Thometzekite Information
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| 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
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Thometzekite
Pb(Cu,Zn)2(AsO4)2•2(H2O)
Dana No: 40.02.09.03 Strunz No: 08.CG.15
Locality:
Notes:
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