Wolframoixiolite Mineral Data (original) (raw)

General Wolframoixiolite Information

Help on Chemical Formula: Chemical Formula:

(Fe,Mn,Nb)(Nb,W,Ta)O4

Help on Composition: 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

Help on Empirical Formula: Empirical Formula:

Fe2+0.6Mn2+0.3Nb0.6W0.3Ta0.1O4

Help on Environment: Environment:

Now considered to be ixiolite.

Help on IMA Status: IMA Status:

Not Approved IMA 1996 - Published 1969

Help on Locality: Locality:

Unknown locality, China. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for its composition and structure, which show similarities to both wolframite and ixiolite.

Help on Name Pronunciation: Name Pronunciation:

Wolframoixiolite + Pronunciation Say WOLFRAMOIXIOLITE

Wolframoixiolite Image

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

Wolframoixiolite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.8239:1:0.8901

Help on Cell Dimensions: Cell Dimensions:

a = 4.674, b = 5.673, c = 5.05, Z = 2; beta = 90° V = 133.90 Den(Calc)= 6.03

Help on Crystal System: Crystal System:

Monoclinic - DomaticH-M Symbol (m) Space Group: Pc

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.963(1), 1.716(0.7), 3.641(0.7),

Physical Properties of Wolframoixiolite

Help on Cleavage: Cleavage:

{???} Perfect, {???} Fair

Help on Color: Color:

Black.

Help on Density: Density:

6.55

Help on Diaphaneity: Diaphaneity:

Opaque

Help on Hardness: Hardness:

5-6 - Between Apatite and Orthoclase

Help on Luminescence: Luminescence:

Highly Radioactive.

Help on Luster: Luster:

Sub Metallic

Help on Streak: Streak:

brownish black

Optical Properties of Wolframoixiolite

Help on Optical Data: 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

Help on RL Color: RL Color:

Gray with a reddish brown tint.

Calculated Properties of Wolframoixiolite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=5.42 gm/cc
note: Specific Gravity of Wolframoixiolite =6.03 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Help on Photoelectric: Photoelectric:

PEWolframoixiolite = 400.22 barns/electron
U=PEWolframoixiolite x rElectron Density=2,169.17 barns/cc.

Help on Radioactivity: Radioactivity:

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

Wolframoixiolite Classification

Help on Dana Class: 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

Help on Strunz Class: 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

Help on References: References:

NAME( AmMin, v55:318) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AmMin, v55:318)

Help on See Also: 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 :

A Bijoux Google Search for Wolframoixiolite
Adam's Minerals Google Search for Wolframoixiolite
Cape Minerals Google Search for Wolframoixiolite
Dakota Matrix Minerals Google Search for Wolframoixiolite
Excalibur Mineral Corp. Google Search for Wolframoixiolite
Exceptional Minerals Google Search for Wolframoixiolite
John Betts Fine Minerals Search for Wolframoixiolite
McDougall Minerals Google Search for Wolframoixiolite
Mineral News Website Link
Rock and Mineral Shows Google Search for Wolframoixiolite
Weinrich Minerals, Inc. Google Search 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 Espa�ol

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: