Stibiotantalite Mineral Data + Say STIBIOTANTALITE

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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 IMA Status: IMA Status: Valid Species (Pre-IMA) 1893
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 25548
  PDF 16-908
 

Stibiotantalite Image

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Stibiotantalite

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 - PyramidalH-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:

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Forms: [ 1 1 1] [ 0 1 0] [ 1 0 1] [ 1 1 0]

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Dihlstrom K , Zeitschrift fur Anorganische und Allgemeine Chemie , 239 (1938) p.57-64, Uber den bau des wahren antimontetroxyds und des damit isomorphen, stibiotantalits, SbTaO4, Locality: Grande Mesa, California, USA

 

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 Diaphaniety: Diaphaniety: 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
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:

relectron=6.44 gm/cc
note: rStibiotantalite =7.57 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00014
Boson Index = 0.99986
Help on Photoelectric: Photoelectric:

PEStibiotantalite = 711.98 barns/electron
U=PEStibiotantalite x relectron=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: 8.1.6.2 (8)Multiple Oxides with Nb, Ta, and Ti
  (8.1)where A BO4
  (8.1.6)Dana Group
 
8.1.6.1 Stibiocolumbite SbNbO4 Pc21n mm2
 
8.1.6.2 Stibiotantalite SbTaO4 Pc21n mm2
 
8.1.6.3 Bismutotantalite Bi(Ta,Nb)O4 Pcmn 2/m 2/m 2/m
 
8.1.6.4 Bismutocolumbite Bi(Nb,Ta)O4 Pcnn 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: IV/D.25-30 IV - Oxides
  IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)
  IV/D.25 - Cervantite - Chiluite series
 
IV/D.25-05 Clinocervantite! SbSbO4 C 2/c 2/m
 
IV/D.25-10 Cervantite SbSbO4 Pbn21 mm2
 
IV/D.25-20 Stibiocolumbite SbNbO4 Pc21n mm2
 
IV/D.25-30 Stibiotantalite SbTaO4 Pc21n mm2
 
IV/D.25-35 Bismutocolumbite Bi(Nb,Ta)O4 Pcnn 2/m 2/m 2/m
 
IV/D.25-40 Bismutotantalite Bi(Ta,Nb)O4 Pcmn 2/m 2/m 2/m
 
IV/D.25-70 Chiluite Bi6Te2Mo2O21 P 6322, P 63/m, P 63 Hex
 

Other Stibiotantalite Information

Help on References: References: 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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 - Minerals of Wisconsin 13 -QUT Mineral Atlas 14 -École des Mines de Paris

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Stibiotantalite

SbTaO4
Dana No: 8.1.6.2 Strunz No: IV/D.25-30
Locality:

 

Notes:

 

 
   
 
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