Bismutotantalite Mineral Data + Say BISMUTOTANTALITE

Masons Minerals
[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 Bismutotantalite Information

Help on Chemical  Formula: Chemical Formula: Bi(Ta,Nb)O4
Help on Composition: Composition: Molecular Weight = 436.32 gm
   Tantalum  33.18 %  Ta   40.51 % Ta2O5
   Niobium    4.26 %  Nb    6.09 % Nb2O5
   Bismuth   47.90 %  Bi   53.40 % Bi2O3
   Oxygen    14.67 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BiTa0.8Nb0.2O4
Help on Environment: Environment: In a pegmatite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1929
Help on Locality: Locality: Gamba Hill, Busiro Co., Uganda. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition (Bi, Ta).
 

Bismutotantalite Image

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

Bismutotantalite

Comments: Tan coatings of bismutotantalite on white feldspar with pink lepidolite.
Location: Harding Mine, Taos County, New Mexico, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bismutotantalite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4788:1:0.4214
Help on Cell Dimensions: Cell Dimensions: a = 5.633, b = 11.763, c = 4.957, Z = 4; V = 328.46 Den(Calc)= 8.82
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcmn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.148(1), 2.945(0.6), 3.555(0.3),
Help on Forms: Forms:

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

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

Help on Above

Forms: [ 1 3 0] [ 0 1 0] [ 1 1 1] [ 1 0 1] [ 1 1 0]

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Click Here for Large Bismutotantalite Structure Window 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


Galliski M A , Marquez-Zavalia M F , Cooper M A , Cerny P , Hawthorne F C , The Canadian Mineralogist , 39 (2001) p.103-110, Bismutotantalite from northwestern Argentina: Description and, crystal structure, Sample: [Bi] phase, Locality: northwestern Argentina

View Additional jPOWD Structure files for Bismutotantalite
[1]
 

Physical Properties of Bismutotantalite

Help on Cleavage: Cleavage: [010] Perfect, [101] Distinct
Help on Color: Color: Light brown, Black.
Help on Density: Density: 8.51 - 8.84, Average = 8.67
Help on Diaphaniety: Diaphaniety: Subtranslucent to Opaque
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Adamantine - Metallic
Help on Streak: Streak: yellowish brown
 

Optical Properties of Bismutotantalite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.018 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1594,KPDmeas= 0.1621,KC= 0.1592
Help on Optical Data: Optical Data: Biaxial (+), a=2.388, b=2.403, g=2.428, bire=0.0400, 2V(Calc)=78, 2V(Meas)=80. Dispersion r < v.
 

Calculated Properties of Bismutotantalite

Help on Electron Density: Electron Density:

relectron=7.34 gm/cc
note: rBismutotantalite =8.82 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00011
Boson Index = 0.99989
Help on Photoelectric: Photoelectric:

PEBismutotantalite =1,343.63 barns/electron
U=PEBismutotantalite x relectron=9,864.90 barns/cc.

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

Bismutotantalite is Not Radioactive

 

Bismutotantalite Classification

Help on  Dana Class: Dana Class: 8.1.6.3 (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.25-40 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 Bismutotantalite Information

Help on References: References: NAME( Dana8) 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 Bismutotantalite :
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

Search for Bismutotantalite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Bismutotantalite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Bismutotantalite Mineral Data :

Ask about Bismutotantalite 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 Bismutotantalite Specimen Label here :

Bismutotantalite

Bi(Ta,Nb)O4
Dana No: 8.1.6.3 Strunz No: IV/D.25-40
Locality:

 

Notes:

 

 
   
 
Go To Webmineral Home Crystallography X-Ray D-Spacing Table Chemical Composition
Dana Classification Strunz Classification Table of Mineral Properties Alphabetical Listing of Minerals
Search Webmineral Photo Gallery of Mineral Images Help Files Links