Bismutocolumbite Mineral Data

[Thumbnails] [Miniatures] [Cabinets] [About Us] [FAQ]
Welcome To Mason's Minerals
Your Source for Beautiful Minerals and Crystals
We offer a no-questioned-asked Satisfaction Guarantee

General Bismutocolumbite Information

Chemical Formula:

Bi(Nb,Ta)O4

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

Empirical Formula:

BiNb_0.75Ta_0.25O₄

Environment:

In a pegmatite.

IMA Status:

Approved IMA 1992

Locality:

In the Danburitovaya mine, Malkhan Range, central Transbaikal, Russia. Link to MinDat.org Location Data.

Name Origin:

For BISMuth in its composition and relation to minerals of the "columbite-tantalite" series.

Name Pronunciation:

Bismutocolumbite + Pronunciation

Synonym:

ICSD 74338

IMA1991-003

PDF 45-1372

Bismutocolumbite Image

Images:

Bismutocolumbite

Comments: Black crystals of bismutocolumbite.
Location: Malkhan, Krasny Chikoy, Transbaikalia, Siberia. Scale: Picture Size 5 mm.
© Thomas Witzke

Bismutocolumbite Crystallography

Axial Ratios:

a:b:c =0.4255:1:0.4839

Cell Dimensions:

a = 4.992, b = 11.731, c = 5.677, Z = 3; V = 332.45 Den(Calc)= 5.81

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/I_o): 3.164(1), 2.934(0.9), 1.734(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
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

Cleavage:

{001} Perfect

Color:

Black.

Density:

7.56

Diaphaneity:

Subtranslucent to Opaque

Hardness:

5.5 - Knife Blade

Luster:

Sub Metallic

Streak:

yellowish brown

Optical Properties of Bismutocolumbite

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

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

Electron Density:

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

Fermion Index:

Fermion Index = 0.0000937271
Boson Index = 0.9999062729

Photoelectric:

PE_{Bismutocolumbite}=1,197.40 barns/electron
U=PE_{Bismutocolumbite} x rElectron Density=7,654.56 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bismutocolumbite is Not Radioactive

Bismutocolumbite Classification

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

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

References:

NAME( AntBidBlaNic3) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)

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 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Bismutocolumbite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Bismutocolumbite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Bismutocolumbite Mineral Data :

Ask about Bismutocolumbite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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: