Wolframite Mineral Data + 
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- 48.1.1.0 Wolframite * (Fe,Mn)WO4 P 2/c 2/m
- 48.1.1.1 Hubnerite MnWO4 P 2/c 2/m
- 48.1.1.2 Ferberite FeWO4 P 2/c 2/m
- 48.1.1.3 Sanmartinite (Zn,Fe)WO4 P 2/c 2/m
General Wolframite Information |
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 Chemical Formula: |
(Fe,Mn)WO4 | ||
| 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 | |||
| Empirical Formula: |
Fe2+0.5Mn2+0.5(WO4) | ||
| Environment: |
Group name for the hübnerite - ferberite series. | ||
| IMA Status: |
Not Approved IMA 1863 | ||
| Locality: |
Link to MinDat.org Location Data. | ||
| Name Origin: |
From the German, Wolfram, name for tungsten. | ||
| Synonym: |
ICSD 15192 | ||
| PDF 12-727 | |||
Wolframite Image | |||
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Images:
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Wolframite Crystallography |
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| Axial Ratios: |
a:b:c =0.8324:1:0.8691 | ||
| Cell Dimensions: |
a = 4.77, b = 5.73, c = 4.98, Z = 2; beta = 90° V = 136.11 Den(Calc)= 7.40 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/c | ||
| Forms:
Mouse |
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Crystal Structure:
Mouse |
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Physical Properties of Wolframite |
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| Cleavage: |
[010] Perfect | ||
| Color: |
Brownish black, Iron black. | ||
| Density: |
7.1 - 7.5, Average = 7.3 | ||
| Diaphaniety: |
Opaque | ||
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
| Habit: |
Lamellar - Thin laminae producing a lamellar structure. | ||
| Habit: |
Massive - Granular - Common texture observed in granite and other igneous rock. | ||
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | ||
| Hardness: |
4.5 - Between Fluorite and Apatite | ||
| Luminescence: |
None. | ||
| Luster: |
Sub Metallic | ||
| Streak: |
reddish brown | ||
Optical Properties of Wolframite |
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| 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 |
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Calculated Properties of Wolframite |
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| Electron Density: |
relectron=6.42 gm/cc |
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| Fermion Index |
Fermion Index = 0.08863 Boson Index = 0.91137 |
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| Photoelectric: |
PEWolframite = 759.93 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Wolframite is Not Radioactive |
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Wolframite Classification |
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| Dana Class: |
48.1.1.0 (48)Anhydrous Molybdates and Tungstates | ||
| (48.1)where A XO4 | |||
| (48.1.1)Wolframite series | |||
| Strunz Class: |
IV/D.16-00 IV - Oxides | ||
| IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds) | |||
| IV/D.16 - Wolframite series | |||
Other Wolframite Information |
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| References: |
NAME( Sinkankas66) PHYS. PROP.(Mason68) | ||
| See Also: |
Links to other databases for Wolframite : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - CalTech Mineral Spectroscopy 6 - Crocoite.com Mineral Locations 7 - Glendale Community College 8 -Google Images 9 -Google Scholar 10 -MinDAT 11 -MinMax(Deutsch) 12 -MinMax(English) 13 -Mineralienatlas (Deutsch) 14 - Philatelic Mineralogy 15 -QUT Mineral Atlas 16 - Scandinavian mineral gallery 17 -University of Colorado - Mineral Structure Data 18 - University of Manchester - Mineral Structure 19 - WWW-MINCRYST 20 - YupRocks Search for Wolframite using: Visit our Advertisers for Wolframite : Translate Wolframite Mineral Data : Ask about Wolframite here : Print or Cut-and-Paste your Wolframite Specimen Label here :
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