Wolframite Mineral Data

General Wolframite Information

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.

Name Pronunciation:

Wolframite + Pronunciation

Synonym:

ICSD 15192

PDF 12-727

Wolframite Image

Images:

Wolframite

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 BÃ¼del

Wolframite Crystallography

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
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
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 large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Escobar C , Cid-Dresdner H , Kittl P , Dumler I , American Mineralogist , 56 (1971) p.489-498, The relation between light wolframite and common wolframite, sample: light wolframite

View Additional jPOWD Structure files for Wolframite
[1]

Physical Properties of Wolframite

Cleavage:

{010} Perfect

Color:

Brownish black, Iron black.

Density:

7.1 - 7.5, Average = 7.3

Diaphaneity:

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:

Non-fluorescent.

Luster:

Sub Metallic

Streak:

reddish brown

Optical Properties of Wolframite

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

Electron Density:

Bulk Density (Electron Density)=6.42 gm/cc
note: Specific Gravity of Wolframite =7.40 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_Wolframite= 759.93 barns/electron
U=PE_Wolframite x rElectron Density=4,877.22 barns/cc.

Radioactivity:

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

Wolframite Classification

Dana Class:

48.01.01.00 (48)Anhydrous Molybdates and Tungstates

(48.01)where A XO4

(48.01.01)Wolframite series

48.01.01.00 Wolframite* (Fe,Mn)WO4 P 2/c 2/m

48.01.01.01 Hubnerite MnWO4 P 2/c 2/m

48.01.01.02 Ferberite FeWO4 P 2/c 2/m

48.01.01.03 Sanmartinite (Zn,Fe)WO4 P 2/c 2/m

48.01.01.04 Heftetjernite! ScTaO4 P 2/c 2/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 Wolframite Information

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 - 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
17 - WWW-MINCRYST
18 - YupRocks

Search for Wolframite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Wolframite :

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

Ask about Wolframite 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 Español

Print or Cut-and-Paste your Wolframite Specimen Label here :

Wolframite

(Fe,Mn)WO4
Dana No: 48.01.01.00 Strunz No: 04.DB.30
Locality:

Notes: