Mineralogy Database

Wolframoixiolite Mineral Data

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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

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Comments: Wolframoixiolite crystals in quartz.
Location: Zinnwald, Severocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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 - Domatic H-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)Oxide Minerals
  (04.00)Without Dana Classification Numbers
  (04.00.00)Oxide Ashanite? (Nb,Ta,U,Fe,Mn)4O8 Pcan 2/m 2/m 2/m Chubutite* Pb7O6Cl2 Unk Ortho Clinobirnessite* Na4Mn14O27•9(H2O) Mono Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m IMA2008-022 UO2(OH)2 pseudo-orthorhombic Mono Krasnogorite* WO3 Pmnb 2/m 2/m 2/m Mengxianminite* (Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29 Unk Ortho Romanite* (Fe,U,Pb)2(Ti,Fe)O4 Trig ? Trig Tantalowodginite* (Mn2,[])4Ta4Ta8O32 C 2/c 2/m Ungursaite* NaCa5(Ta,Nb)24O65(OH) P 63/m,P 63 Hex 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

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Dana No: Strunz No: 04.DB.30





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