Bismutocolumbite Mineral Data (original) (raw)

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 Name Pronunciation: Name Pronunciation:

Bismutocolumbite + Pronunciation Say BISMUTOCOLUMBITE

Help on Synonym: Synonym:

ICSD 74338

IMA1991-003

PDF 45-1372

Bismutocolumbite Image

Click Here for Larger Bismutocolumbite Image in a New Browser Window Images:

Click Here for Larger Bismutocolumbite Image Bismutocolumbite Comments: Black crystals of bismutocolumbite. Location: Malkhan, Krasny Chikoy, Transbaikalia, Siberia.Scale: Picture Size 5 mm. © Thomas Witzke

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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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Help on Above

| | 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 Diaphaneity: Diaphaneity:

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
Ncalc = 2.06 - 2.38

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:

Bulk Density (Electron Density)=6.39 gm/cc
note: Specific Gravity of Bismutocolumbite =7.56 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0000937271
Boson Index = 0.9999062729

Help on Photoelectric: Photoelectric:

PEBismutocolumbite =1,197.40 barns/electron
U=PEBismutocolumbite x rElectron Density=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:

08.01.06.04 (08)Multiple Oxides with Nb, Ta, and Ti

(08.01)where A BO4

(08.01.06)Stibiocolumbite Group

08.01.06.01 Stibiocolumbite SbNbO4 Pc21n mm2

08.01.06.02 Stibiotantalite SbTaO4 Pc21n mm2

08.01.06.03 Bismutotantalite Bi(Ta,Nb)O4 Pcmn 2/m 2/m 2/m

08.01.06.04 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 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 - 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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Print or Cut-and-Paste your Bismutocolumbite Specimen Label here :

Bismutocolumbite

Bi(Nb,Ta)O4
Dana No: 08.01.06.04 Strunz No: 04.DE.30
Locality:

Notes: