| |
 |
Wolframoixiolite Mineral Data
|
|
|
General Wolframoixiolite Information
|
 Chemical Formula: |
(Fe,Mn,Nb)(Nb,W,Ta)O4 |
| Composition: |
Molecular Weight = 242.98 gm |
| |
Tantalum 7.45 % Ta 9.09 % Ta2O5 |
| |
Manganese 6.78 % Mn 8.76 % MnO |
| |
Niobium 22.94 % Nb 32.82 % Nb2O5 |
| |
Iron 13.79 % Fe 17.74 % FeO |
| |
Tungsten 22.70 % W 28.63 % WO3 |
| |
Oxygen 26.34 % O |
| |
______ ______ |
| |
100.00 % 97.04 % = TOTAL OXIDE |
| Empirical Formula: |
Fe2+0.6Mn2+0.3Nb0.6W0.3Ta0.1O4 |
| Environment: |
Now considered to be ixiolite. |
| IMA Status: |
Not Approved IMA 1996 - Published 1969 |
| Locality: |
Unknown locality, China. Link to MinDat.org Location Data. |
| Name Origin: |
Named for its composition and structure, which show similarities to both wolframite and ixiolite. |
| Name Pronunciation: |
Wolframoixiolite + Pronunciation  |
| |
Wolframoixiolite Image |
|
Images:
|
|
Wolframoixiolite Crystallography
|
| Axial Ratios: |
a:b:c =0.8239:1:0.8901 |
| Cell Dimensions: |
a = 4.674, b = 5.673, c = 5.05, Z = 2; beta = 90° V = 133.90 Den(Calc)= 6.03 |
| Crystal System: |
Monoclinic - Domatic H-M Symbol (m) Space Group: Pc |
| X Ray Diffraction: |
By Intensity(I/Io): 2.963(1), 1.716(0.7), 3.641(0.7), |
| |
Physical Properties of Wolframoixiolite
|
| Cleavage: |
{???} Perfect, {???} Fair |
| Color: |
Black. |
| Density: |
6.55 |
| Diaphaneity: |
Opaque |
| Hardness: |
5-6 - Between Apatite and Orthoclase |
| Luminescence: |
Highly Radioactive. |
| Luster: |
Sub Metallic |
| Streak: |
brownish black |
| |
Optical Properties of Wolframoixiolite
|
| Optical Data: |
NCalc= 2.21 - from Gladstone-Dale relationship (KC = 0.2012) where Ncalc=Dcalc*KC+1
NCalc= 2.32 - from Gladstone-Dale relationship (KC = 0.2012) where Ncalc=Dmeas*KC+1
|
| RL Color: |
Gray with a reddish brown tint. |
| |
Calculated Properties of Wolframoixiolite
|
| Electron Density: |
Bulk Density (Electron Density)=5.42 gm/cc
note: Specific Gravity of Wolframoixiolite =6.03 gm/cc.
|
| Fermion Index: |
Fermion Index = 0.03
Boson Index = 0.97 |
| Photoelectric: |
PEWolframoixiolite = 400.22 barns/electron
U=PEWolframoixiolite x rElectron Density=2,169.17 barns/cc.
|
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wolframoixiolite is Not Radioactive |
| |
Wolframoixiolite Classification
|
| Dana Class: |
04.00.00.00 (04)Oxide Minerals |
| |
(04.00)Without Dana Classification Numbers |
| |
(04.00.00)Oxide |
| |
04.00.00.00 Ashanite? (Nb,Ta,U,Fe,Mn)4O8 Pcan 2/m 2/m 2/m |
| |
04.00.00.00 Chubutite* Pb7O6Cl2 Unk Ortho |
| |
04.00.00.00 Clinobirnessite* Na4Mn14O27•9(H2O) Mono |
| |
04.00.00.00 Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m |
| |
04.00.00.00 IMA2008-022 UO2(OH)2 pseudo-orthorhombic Mono |
| |
04.00.00.00 Krasnogorite* WO3 Pmnb 2/m 2/m 2/m |
| |
04.00.00.00 Mengxianminite* (Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29 Unk Ortho |
| |
04.00.00.00 Romanite* (Fe,U,Pb)2(Ti,Fe)O4 Trig ? Trig |
| |
04.00.00.00 Tantalowodginite* (Mn2,[])4Ta4Ta8O32 C 2/c 2/m |
| |
04.00.00.00 Ungursaite* NaCa5(Ta,Nb)24O65(OH) P 63/m,P 63 Hex |
| |
04.00.00.00 Wolframoixiolite* (Fe,Mn,Nb)(Nb,W,Ta)O4 Pc m |
| Strunz Class: |
04.DB.30 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
| |
04.D - Metal:Oxygen = 1:2 and similar |
| |
04.DB -With medium-sized cations; chains of edge-sharing octahedra |
| |
04.DB.30 Ferberite FeWO4 P 2/c 2/m |
| |
04.DB.30 Hubnerite MnWO4 P 2/c 2/m |
| |
04.DB.30 Krasnoselskite* CoWO4 P 2/c 2/m |
| |
04.DB.30 Sanmartinite (Zn,Fe)WO4 P 2/c 2/m |
| |
04.DB.30 Wolframoixiolite* (Fe,Mn,Nb)(Nb,W,Ta)O4 Pc m |
| |
04.DB.30 Wolframite* (Fe,Mn)WO4 P 2/c 2/m |
| |
04.DB.30 Heftetjernite! ScTaO4 P 2/c 2/m |
| |
Other Wolframoixiolite Information
|
| References: |
NAME( AmMin, v55:318) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AmMin, v55:318) |
| See Also: |
Links to other databases for Wolframoixiolite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
Search for Wolframoixiolite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Wolframoixiolite :
Ask about Wolframoixiolite 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
Espaņol
Print or Cut-and-Paste your Wolframoixiolite Specimen Label here :
|
Wolframoixiolite
(Fe,Mn,Nb)(Nb,W,Ta)O4
Dana No: 04.00.00.00 Strunz No: 04.DB.30
Locality:
Notes:
|
|
| |
| |
|
| |
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.
