Bismutocolumbite Mineral Data + Say BISMUTOCOLUMBITE


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General Bismutocolumbite Information

Help on Chemical  Formula: Chemical Formula: Bi(Nb,Ta)O4
Help on Composition: Composition: Molecular Weight = 387.89 gm
   Tantalum  11.66 %  Ta   14.24 % Ta2O5
   Niobium   17.96 %  Nb   25.70 % Nb2O5
   Bismuth   53.88 %  Bi   60.06 % Bi2O3
   Oxygen    16.50 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BiNb0.75Ta0.25O4
Help on Environment: Environment: In a pegmatite.
Help on IMA Status: IMA Status: Approved IMA 1992
Help on Locality: Locality: In the Danburitovaya mine, Malkhan Range, central Transbaikal, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For BISMuth in its composition and relation to minerals of the "columbite-tantalite" series.
Help on Synonym: Synonym: ICSD 74338
  IMA1991-003
  PDF 45-1372
 

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Bismutocolumbite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4255:1:0.4839
Help on Cell Dimensions: Cell Dimensions: a = 4.992, b = 11.731, c = 5.677, Z = 3; V = 332.45 Den(Calc)= 5.81
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcnn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.164(1), 2.934(0.9), 1.734(0.8),
Click Here for Large Bismutocolumbite Structure Window Crystal Structure:

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Zubkova N V , Pushcharovsky D Y , Giester G , Smolin A S , Tillmanns E , Brandstatter F , Hammer V , Peretyazhko I S , Sapozhnikov A N , Kashaev A A , Neues Jahrbuch fur Mineralogie, Monatshefte , 2002 (2002) p.145-159, Bismutocolumbite, Bi(Nb.79Ta.21)O4, stibiocolumbite, Sb(Nb.67Ta.33)O4 and their, structural relation to the other ABO4 minerals with, stibiotantalite (SbTaO4) structure, Locality: Malkhan field, Central Transbaikalia, Russia

 

Physical Properties of Bismutocolumbite

Help on Cleavage: Cleavage: [001] Perfect
Help on Color: Color: Black.
Help on Density: Density: 7.56
Help on Diaphaniety: Diaphaniety: Subtranslucent to Opaque
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: yellowish brown
 

Optical Properties of Bismutocolumbite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.344 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.245,KPDmeas= 0.1883,KC= 0.1823
Help on Optical Data: Optical Data: Biaxial (+), a=2.38, b=2.42, g=2.47, bire=0.0900, 2V(Calc)=86, 2V(Meas)=85.
 

Calculated Properties of Bismutocolumbite

Help on Electron Density: Electron Density:

relectron=6.39 gm/cc
note: rBismutocolumbite =7.56 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00009
Boson Index = 0.99991
Help on Photoelectric: Photoelectric:

PEBismutocolumbite =1,197.40 barns/electron
U=PEBismutocolumbite x relectron=7,654.56 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bismutocolumbite is Not Radioactive

 

Bismutocolumbite Classification

Help on  Dana Class: Dana Class: 8.1.6.4 (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.25-35 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 Bismutocolumbite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)
Help on See Also: See Also: Links to other databases for Bismutocolumbite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Bismutocolumbite

Bi(Nb,Ta)O4
Dana No: 8.1.6.4 Strunz No: IV/D.25-35
Locality:

 

Notes:

 

 
   
 
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