Ferberite Mineral Data

Ferberite Mineral Data
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General Ferberite Information

Help on Chemical Formula: Chemical Formula: Fe++WO4
Help on Composition: Composition: Molecular Weight = 303.69 gm
   Iron      18.39 %  Fe   23.66 % FeO
   Tungsten  60.54 %  W    76.34 % WO3
   Oxygen    21.07 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+(WO4)
Help on Environment: Environment: In high-temperature hydrothermal veins, greisens, and granitic pegmatites, also a residual mineral in alluvial and eluvial deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1863
Help on Locality: Locality: Aquiles, Sierra Almagrera, Spain. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Moritz Rudolph Ferber (1805-1875) of Gera, Germany.
Help on Name Pronunciation: Name Pronunciation: Ferberite + Pronunciation Say FERBERITE
Help on Synonym: Synonym: ICSD 64733
  PDF 46-1446
 

Ferberite Image

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Ferberite

Comments: Ferberite with minor siderite selvage.
Location: Panasqueira (2nd level), in the region of Beira Baixa, Portugal. Scale: 6 x 5 cm.
© Fabre Minerals
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Ferberite   Anthoinite   Cerotungstite-(Ce)

Comments: Yellow cerotungstite-(Ce), with black ferberite veins and whitish anthoinite.
Location: Bugarama, Rwanda. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferberite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.838:1:0.8661
Help on Cell Dimensions: Cell Dimensions: a = 4.76, b = 5.68, c = 4.92, Z = 2; beta = 90.016° V = 133.02 Den(Calc)= 7.58
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.941(1), 4.75(0.45), 3.752(0.35),
Help on Forms: Forms:

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

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Ulku D , Zeitschrift fur Kristallographie , 124 (1967) p.192-219, Untersuchungen zur kristallstruktur und magnetischen struktur, des ferberits FeWO4

 

Physical Properties of Ferberite

Help on Cleavage: Cleavage: {010} Perfect, {100} Parting, {102} Parting
Help on Color: Color: Black.
Help on Density: Density: 7.5 - 7.4, Average = 7.45
Help on Diaphaneity: Diaphaneity: Nearly opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
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 Luster: Luster: Sub Metallic
Help on Streak: Streak: brownish black
 

Optical Properties of Ferberite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1748,KPDmeas= 0.1778,KC= 0.175
Ncalc = 2.3 - 2.33
Help on Optical Data: Optical Data: Biaxial (+), a=2.255, b=2.305, g=2.414, bire=0.1590, 2V(Calc)=72, 2V(Meas)=68.
Help on Pleochroism (x): Pleochroism (x): dark brown.
Help on Pleochroism (y): Pleochroism (y): dark brown.
Help on Pleochroism (z): Pleochroism (z): dark brown.
Help on RL Anisotrophism: RL Anisotrophism: Distinct.
Help on RL Bireflectance: RL Bireflectance: Weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Ferberite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   16.50   19.50 
   
 420 nm   16.40   19.20 
 440 nm   16.30   18.90 
 460 nm   16.20   18.70 
 480 nm   15.90   18.50 
 500 nm   16.00   18.70 
 520 nm   16.00   18.70 
 540 nm   16.00   18.70 
 560 nm   16.00   18.70 
 580 nm   15.80   18.60 
 600 nm   15.80   18.60 
 620 nm   15.70   18.60 
 640 nm   15.60   18.50 
 660 nm   15.50   18.30 
 680 nm   15.40   18.10 
 700 nm   15.50   18.00 
Calculated Relative Intensity Colors of Ferberite in Air
Relative
Intensity		    0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 540% 560%
R1                        
R2                        
 

Calculated Properties of Ferberite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.59 gm/cc
note: Specific Gravity of Ferberite =7.58 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.09
Boson Index = 0.91
Help on Photoelectric: Photoelectric: PEFerberite = 757.55 barns/electron
U=PEFerberite x rElectron Density=4,991.71 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferberite is Not Radioactive
 

Ferberite Classification
Help on Dana Class: Dana Class: 48.01.01.02 (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
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 Ferberite Information
Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic5, Enc. of Minerals, 2nd ed)
Help on See Also: See Also: Links to other databases for Ferberite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineralienatlas (Deutsch)
14 - Philatelic Mineralogy
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - University of Colorado - Mineral Structure Data
18 - WWW-MINCRYST
19 - theimage

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

Ferberite

Fe++WO4
Dana No: 48.01.01.02 Strunz No: 04.DB.30
Locality:

 

Notes: