Tsumoite Mineral Data

General Tsumoite Information

Chemical Formula:

BiTe

Composition:

Molecular Weight = 336.58 gm

Bismuth 62.09 % Bi

Tellurium 37.91 % Te

______

100.00 %

Empirical Formula:

BiTe

Environment:

As small irregular aggregates in skarns associated with pyrometasomatic Cu-Zn-Pb deposits.

IMA Status:

Approved IMA 1978

Locality:

Tsumo mine, Hiroshima, Shimane prefecture, Honshu, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Tsumoite

Synonym:

ICSD 30525

PDF 44-667

Tsumoite Image

Images:

Tsumoite

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

Images:

Tsumoite Smirnite

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

Images:

Tsumoite Volynskite

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

Axial Ratios:

a:c = 1:5.43871

Cell Dimensions:

a = 4.422, c = 24.05, Z = 6; V = 407.27 Den(Calc)= 8.23

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 3m1

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

By Intensity(I/I_o): 3.23(1), 2.36(0.6), 2.21(0.5),

Crystal Structure:

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Shimazaki H , Ozawa T , American Mineralogist , 63 (1978) p.1162-1165, Tsumoite, BiTe, a new mineral from Tsumo mine, Japan

Physical Properties of Tsumoite

Cleavage:

{0001} Perfect

Color:

Silver white.

Density:

8.16

Diaphaneity:

Opaque

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Metallic

Streak:

steel gray

Optical Properties of Tsumoite

RL Anisotrophism:

Moderate.

RL Color:

White with a creamy tint.

RL Pleochroism:

Very weak.

Calculated Properties of Tsumoite

Electron Density:

Bulk Density (Electron Density)=6.60 gm/cc
note: Specific Gravity of Tsumoite =8.23 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Tsumoite=1,390.51 barns/electron
U=PE_Tsumoite x rElectron Density=9,180.15 barns/cc.

Radioactivity:

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

Tsumoite Classification

Dana Class:

02.08.20.01 (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)

02.08.20.01 Tsumoite BiTe P 3m1 3 2/m

02.08.20.02 Sulphotsumoite Bi3Te2S P 3m1 3 2/m

02.08.20.03 Nevskite Bi(Se,S) P 3m1 3 2/m

02.08.20.04 Ingodite Bi(S,Te) P 3m1 3 2/m

02.08.20.05 Telluronevskite! Bi3TeSe2 P 3m1 3 2/m

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

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

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
16 - WWW-MINCRYST

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Ask about Tsumoite 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 Tsumoite Specimen Label here :

Tsumoite

BiTe
Dana No: 02.08.20.01 Strunz No: 02.DC.05b
Locality:

Notes: