Thoreaulite Mineral Data

Thoreaulite Mineral Data
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General Thoreaulite Information

Help on Chemical Formula: Chemical Formula: Sn++Ta2O6
Help on Composition: Composition: Molecular Weight = 576.60 gm
   Tantalum  62.76 %  Ta   76.64 % Ta2O5
   Tin       20.59 %  Sn   23.36 % SnO
   Oxygen    16.65 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: SnTa2O6
Help on Environment: Environment: Secondary mineral in cassiterite-bearing rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1933
Help on Locality: Locality: Manono, Shaba, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Jacques Thoreau (188-1971), University of Louvain, Belogium.
Help on Name Pronunciation: Name Pronunciation: Thoreaulite + Pronunciation Say THOREAULITE
Help on Synonym: Synonym: ICSD 15206
  PDF 44-1411
 

Thoreaulite Image

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Thoreaulite

Comments: Yellow thoreaulite grain.
Location: Ognevka Ta Deposit, Kalba Range, Shyghys Qazaqstan Oblysy (Vostochno-Kazakhstanskaya [Eastern-Kazakhstan] Oblast'), Kazakhstan. Scale: Grain size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Thoreaulite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =3.5231:1:1.1403
Help on Cell Dimensions: Cell Dimensions: a = 17.14, b = 4.865, c = 5.548, Z = 4; beta = 91° V = 462.56 Den(Calc)= 8.28
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.07(1), 3.1(1), 2.86(0.8),
Click Here for Large Thoreaulite Structure Window Crystal Structure:

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Mumme W G , American Mineralogist , 55 (1970) p.367-377, The crystal structure of SnTa2O7, thoreaulite, an example of tin in five-fold, coordination

 

Physical Properties of Thoreaulite

Help on Cleavage: Cleavage: {100} Perfect, {011} Indistinct
Help on Color: Color: Brown, Yellowish, Yellow brown, Resin brown.
Help on Density: Density: 7.6 - 7.9, Average = 7.75
Help on Diaphaneity: Diaphaneity: Translucent to Subopaque
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luster: Luster: Adamantine - Resinous
Help on Streak: Streak: light yellow
 

Optical Properties of Thoreaulite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.255 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.174 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1743,KPDmeas= 0.1862,KC= 0.1484
Ncalc = 2.13 - 2.23
Help on Optical Data: Optical Data: Biaxial (+), a=2.39, b=2.42, g=2.52, bire=0.1300, 2V(Calc)=60, 2V(Meas)=25-35.
 

Calculated Properties of Thoreaulite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.01 gm/cc
note: Specific Gravity of Thoreaulite =8.28 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEThoreaulite = 830.65 barns/electron
U=PEThoreaulite x rElectron Density=5,820.90 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Thoreaulite is Not Radioactive
 

Thoreaulite Classification
Help on Dana Class: Dana Class: 08.03.10.01 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.03)where A (B2O6)
  (08.03.10)Dana Group
 
08.03.10.01 Thoreaulite SnTa2O6 C 2/c 2/m
 
08.03.10.02 Foordite Sn(Nb,Ta)2O6 C 2/c 2/m
Help on Strunz Class: Strunz Class: 04.DG.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DG -With large (± medium-sized) cations; chains of edge-sharing octahedra
 
04.DG.15 Foordite Sn(Nb,Ta)2O6 C 2/c 2/m
 
04.DG.15 Thoreaulite SnTa2O6 C 2/c 2/m
 

Other Thoreaulite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Thoreaulite :
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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Thoreaulite

Sn++Ta2O6
Dana No: 08.03.10.01 Strunz No: 04.DG.15
Locality:

 

Notes: