Mineralogy Database

Tsumoite Mineral Data

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General Tsumoite Information

Help on Chemical  Formula: Chemical Formula: BiTe
Help on Composition: Composition: Molecular Weight = 336.58 gm
   Bismuth    62.09 %  Bi
   Tellurium  37.91 %  Te
             100.00 % 
Help on Empirical Formula: Empirical Formula: BiTe
Help on Environment: Environment: As small irregular aggregates in skarns associated with pyrometasomatic Cu-Zn-Pb deposits.
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: Tsumo mine, Hiroshima, Shimane prefecture, Honshu, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Tsumoite Say TSUMOITE
Help on Synonym: Synonym: ICSD 30525
  PDF 44-667

Tsumoite Image

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Comments: Gray metallic tsumoite in milky quartz.
Location: Biorkdalsgruvan, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Smirnite   Tsumoite

Comments: Grayish to olive-green crusts of smirnite over quartz and metallic-grey tsumoite. Smirnite composition is (Bi1.98Pb.02)2.00Te1.00O4.99.
Location: Shilovo-Isetskii mine, Ekaterinburg (Sverdlovsk), Ekaterinburgskaya (Sverdlovskaya) Oblast', Middle Urals, Urals Region, Russia. Ex Fedor V. Chukhrov specimen collected before WWII. Scale: Picture Size 12x10 mm.
© Pavel M. Kartashov

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  Volynskite   Tsumoite

Comments: BSE image of composite grain of volynskite (AgBiTe) and tsumoite (BiTe) associated with sphalerite in chalcopyrite.
Location: Stobie deposit, South Range breccia belt, Supergiant Ni-Cu-PGE Sudbury District, Ontario, Canada. Scale: See Image.
© National Resouces of Canada

Tsumoite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:5.43871
Help on Cell Dimensions: Cell Dimensions: a = 4.422, c = 24.05, Z = 6; V = 407.27 Den(Calc)= 8.23
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: P 3m1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.23(1), 2.36(0.6), 2.21(0.5),

Physical Properties of Tsumoite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Silver white.
Help on Density: Density: 8.16
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Metallic
Help on Streak: Streak: steel gray

Optical Properties of Tsumoite

Help on RL Anisotrophism: RL Anisotrophism: Moderate.
Help on RL Color: RL Color: White with a creamy tint.
Help on RL Pleochroism: RL Pleochroism: Very weak.

Calculated Properties of Tsumoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.60 gm/cc
note: Specific Gravity of Tsumoite =8.23 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PETsumoite =1,390.51 barns/electron
U=PETsumoite x rElectron Density=9,180.15 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tsumoite is Not Radioactive

Tsumoite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.08)where Am Bn Xp, with (m+n):p=1:1
  (02.08.20)Tsumoite Group (Trigonal: P-3m1) Tsumoite BiTe P 3m1 3 2/m Sulphotsumoite Bi3Te2S P 3m1 3 2/m Nevskite Bi(Se,S) P 3m1 3 2/m Ingodite Bi(S,Te) P 3m1 3 2/m Telluronevskite! Bi3TeSe2 P 3m1 3 2/m
Help on  Strunz Class: Strunz Class: 02.DC.05b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.D - Metal Sulfides, M:S = 3:4 and 2:3
  02.DC -Variable M:S
02.DC.05b Ingodite Bi(S,Te) P 3m1 3 2/m
02.DC.05b Nevskite Bi(Se,S) P 3m1 3 2/m
02.DC.05b Sulphotsumoite Bi3Te2S P 3m1 3 2/m
02.DC.05b Tsumoite BiTe P 3m1 3 2/m
02.DC.05b Telluronevskite! Bi3TeSe2 P 3m1 3 2/m

Other Tsumoite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Tsumoite :
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 - Scandinavian mineral gallery

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Dana No: Strunz No: 02.DC.05b





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