Mineralogy Database

Stibiotantalite Mineral Data

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General Stibiotantalite Information

Help on Chemical  Formula: Chemical Formula: SbTaO4
Help on Composition: Composition: Molecular Weight = 366.70 gm
   Tantalum  49.35 %  Ta   60.25 % Ta2O5
   Antimony  33.20 %  Sb   41.93 % SbO2
   Oxygen    17.45 %  O
            ______        ______ 
            100.00 %      102.18 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: SbTaO4
Help on Environment: Environment: Accessory mineral in complex granite pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1893
Help on Locality: Locality: Greenbushes tin placers, Wodgina district, Western Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Latin for antimony, STIBIum, in the composition, and relation to tantalite.
Help on Name Pronunciation: Name Pronunciation: Stibiotantalite + Pronunciation Say STIBIOTANTALITE
Help on Synonym: Synonym: ICSD 25548
  PDF 16-908

Stibiotantalite Image

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Comments: Translucent stibiotantalite crystal.
Location: Himalaya Mine, Mesa Grande, San Diego County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Stibiotantalite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4156:1:0.4724
Help on Cell Dimensions: Cell Dimensions: a = 4.9, b = 11.79, c = 5.57, Z = 4; V = 321.78 Den(Calc)= 7.57
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pc21n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.13(1), 2.96(0.6), 3.55(0.6),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 1 1) ( 0 1 0) ( 1 0 1) ( 1 1 0)

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Physical Properties of Stibiotantalite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Brown, Greenish yellow, Yellow, Light yellow brown, Dark brown.
Help on Density: Density: 6 - 7.4, Average = 6.7
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine - Resinous
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: light yellow

Optical Properties of Stibiotantalite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -1.316 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -1.05 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1865,KPDmeas= 0.2107,KC= 0.091
Ncalc = 1.55 - 1.69
Help on Optical Data: Optical Data: Biaxial (+), a=2.3742, b=2.4039, g=2.4568, bire=0.0826, 2V(Calc)=76, 2V(Meas)=75.083. Dispersion relatively strong.

Calculated Properties of Stibiotantalite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.44 gm/cc
note: Specific Gravity of Stibiotantalite =7.57 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001429867
Boson Index = 0.9998570133
Help on Photoelectric: Photoelectric: PEStibiotantalite = 711.98 barns/electron
U=PEStibiotantalite x rElectron Density=4,585.80 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Stibiotantalite is Not Radioactive

Stibiotantalite Classification

Help on  Dana Class: Dana Class: (08)Multiple Oxides with Nb, Ta, and Ti
  (08.01)where A BO4
  (08.01.06)Stibiocolumbite Group Stibiocolumbite SbNbO4 Pc21n mm2 Stibiotantalite SbTaO4 Pc21n mm2 Bismutotantalite Bi(Ta,Nb)O4 Pcmn 2/m 2/m 2/m Bismutocolumbite Bi(Nb,Ta)O4 Pcnn 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.DE.30 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DE -With medium-sized cations; with various polyhedra
04.DE.30 Cervantite SbSbO4 Pbn21 mm2
04.DE.30 Bismutotantalite Bi(Ta,Nb)O4 Pcmn 2/m 2/m 2/m
04.DE.30 Bismutocolumbite Bi(Nb,Ta)O4 Pcnn 2/m 2/m 2/m
04.DE.30 Clinocervantite! SbSbO4 C 2/c 2/m
04.DE.30 Stibiocolumbite SbNbO4 Pc21n mm2
04.DE.30 Stibiotantalite SbTaO4 Pc21n mm2

Other Stibiotantalite Information

Help on References: References: NAME( AntBidBlaNic3) 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 Stibiotantalite :
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

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Dana No: Strunz No: 04.DE.30





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