General Tomichite Information![]() (V,Fe)4Ti3AsO13(OH) |
![]() Molecular Weight = 647.82 gm |
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Titanium 22.17 % Ti 36.99 % TiO2 |
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Vanadium 30.67 % V 45.12 % V2O3 |
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Iron 0.86 % Fe 1.23 % Fe2O3 |
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Arsenic 11.57 % As 17.74 % As2O5 |
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Hydrogen 0.16 % H 1.39 % H2O |
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Oxygen 34.58 % O |
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______ ______ |
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100.00 % 102.47 % = TOTAL OXIDE |
![]() V3+3.9Fe3+0.1Ti3AsO13(OH) |
![]() In a specimen from a hydrothermal gold deposit. |
![]() Approved IMA 1979 |
![]() Kalgoorlie, Western Australia. Link to MinDat.org Location Data. |
![]() Named for Stephan A. Tomich (1914-), consulting geologist who discovered the mineral. |
![]() Tomichite + Pronunciation |
![]() | | Tomichite Image
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Tomichite Crystallography![]() a:b:c =0.5021:1:0.3521 |
![]() a = 7.119, b = 14.176, c = 4.992, Z = 2; beta = 105.05° V = 486.51 Den(Calc)= 4.42 |
![]() Monoclinic - PrismaticH-M Symbol (2/m) Space Group: A2/m |
![]() By Intensity(I/Io): 2.662(1), 2.836(0.9), 1.572(0.5), |
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| Physical Properties of Tomichite![]() None |
![]() Black. |
![]() 4.16 |
![]() Opaque |
![]() Tabular - Form dimensions are thin in one direction. |
![]() 6 - Orthoclase |
![]() Resinous |
![]() black |
| Optical Properties of Tomichite![]() Biaxial (?) |
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NCalc= 2.36 - from Gladstone-Dale relationship (KC = 0.3086) where Ncalc=Dcalc*KC+1 |
NCalc= 2.28 - from Gladstone-Dale relationship (KC = 0.3086) where Ncalc=Dmeas*KC+1 ![]() Moderate, yellowish gray to dark gray. |
![]() Gray. |
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| Calculated Properties of Tomichite![]() Bulk Density (Electron Density)=4.15 gm/cc |
note: Specific Gravity of Tomichite =4.42 gm/cc. ![]() Fermion Index = 0.02 |
Boson Index = 0.98 ![]() PETomichite = 17.94 barns/electron |
U=PETomichite x rElectron Density= 74.50 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Tomichite is Not Radioactive | Tomichite Classification![]() 46.02.03.01 (46)Basic or Halogen-Containing Antimonites, Arsenites and Phosphites |
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(46.02)with miscellaneous formulae |
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(46.02.03)Derbylite Group |
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![]() 04.JB.55 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.J - Arsenites, Antimonites, Bismuthites, Sulfites, |
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04.JB -Arsenites, antimonites, bismuthites; with additional anions, without H2O |
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| Other Tomichite Information![]() NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic3) |
![]() Links to other databases for Tomichite : |
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 Tomichite using: Visit our Advertisers for Tomichite : A Bijoux Google Search for TomichiteAdam's Minerals Google Search for Tomichite Cape Minerals Google Search for Tomichite Dakota Matrix Minerals Google Search for Tomichite Excalibur Mineral Corp. Google Search for Tomichite Exceptional Minerals Google Search for Tomichite John Betts Fine Minerals Search for Tomichite McDougall Minerals Google Search for Tomichite Mineral News Website Link Rock and Mineral Shows Google Search for Tomichite Weinrich Minerals, Inc. Google Search for Tomichite Ask about Tomichite here : Print or Cut-and-Paste your Tomichite Specimen Label here :
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