Mineralogy Database

Wolframite Mineral Data

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General Wolframite Information

Help on Chemical  Formula: Chemical Formula: (Fe,Mn)WO4
Help on Composition: Composition: Molecular Weight = 303.24 gm
   Manganese   9.06 %  Mn   11.70 % MnO
   Iron        9.21 %  Fe   11.85 % FeO
   Tungsten   60.63 %  W    76.46 % WO3
   Oxygen     21.10 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+0.5Mn2+0.5(WO4)
Help on Environment: Environment: Group name for the h�bnerite - ferberite series.
Help on IMA Status: IMA Status: Not Approved IMA 1863
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the German, Wolfram, name for tungsten.
Help on Name Pronunciation: Name Pronunciation: Wolframite + Pronunciation Say WOLFRAMITE
Help on Synonym: Synonym: ICSD 15192
  PDF 12-727

Wolframite Image

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Comments: Dark gray, tabular crystals of wolframite to 2 cm. Carsten Sukatsch collection.
Location: Kara-Oba, Republic of Kazakstan. Scale: Picture size 3 cm.
© Willibald Büdel

Wolframite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8324:1:0.8691
Help on Cell Dimensions: Cell Dimensions: a = 4.77, b = 5.73, c = 4.98, Z = 2; beta = 90° V = 136.11 Den(Calc)= 7.40
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/c
Help on Forms: Forms:

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

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

Help on Above

Forms: ( 1 1 0) ( 1 0 0) ( 0 1 1) ( 1 0 2)

Warning: this java applet does not work in some browsers because of security restrictions.


Physical Properties of Wolframite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Brownish black, Iron black.
Help on Density: Density: 7.1 - 7.5, Average = 7.3
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Lamellar - Thin laminae producing a lamellar structure.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: reddish brown

Optical Properties of Wolframite

Help on Optical Data: Optical Data: NCalc= 2.3 - from Gladstone-Dale relationship (KC = 0.1761) where Ncalc=Dcalc*KC+1
NCalc= 2.29 - from Gladstone-Dale relationship (KC = 0.1761) where Ncalc=Dmeas*KC+1

Calculated Properties of Wolframite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.42 gm/cc
note: Specific Gravity of Wolframite =7.40 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PEWolframite = 759.93 barns/electron
U=PEWolframite x rElectron Density=4,877.22 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wolframite is Not Radioactive

Wolframite Classification

Help on  Dana Class: Dana Class: (48)Anhydrous Molybdates and Tungstates
  (48.01)where A XO4
  (48.01.01)Wolframite series Wolframite* (Fe,Mn)WO4 P 2/c 2/m Hubnerite MnWO4 P 2/c 2/m Ferberite FeWO4 P 2/c 2/m Sanmartinite (Zn,Fe)WO4 P 2/c 2/m Heftetjernite! ScTaO4 P 2/c 2/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 Wolframite Information

Help on References: References: NAME( Sinkankas66) PHYS. PROP.(Mason68)
Help on See Also: See Also: Links to other databases for Wolframite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - CalTech Mineral Spectroscopy
5 - GeoScienceWorld
6 - Glendale Community College
7 - Google Images
8 - Google Scholar
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - Philatelic Mineralogy
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Scandinavian mineral gallery
16 - University of Colorado - Mineral Structure Data
18 - YupRocks

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Dana No: Strunz No: 04.DB.30





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