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Hubnerite Mineral Data

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General Hubnerite Information

Help on Chemical  Formula: Chemical Formula: MnWO4
Help on Composition: Composition: Molecular Weight = 302.79 gm
   Manganese  18.14 %  Mn   23.43 % MnO
   Tungsten   60.72 %  W    76.57 % WO3
   Oxygen     21.14 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+(WO4)
Help on Environment: Environment: Typical of high-temperature hydrothermal vein deposits and pneumatolytically altered granites yielding greisen, granite pegmatites and alluvial deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1865
Help on Locality: Locality: Erie and Enterprise veins, Ellsworth (Mammoth) district, Nye County, Nevada, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: After the German mineralogist, Adolph Huebner.
Help on Name Pronunciation: Name Pronunciation: Hubnerite + Pronunciation Say HUBNERITE
Help on Synonym: Synonym: Huebnerite

Hubnerite Image

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Comments: Sharp, dark tabular crystals of h├╝bnerite with pyrite.
Location: Cavnic, Romania. Scale: Crystal size 2 cm.
© John Attard

Hubnerite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8408:1:0.8685
Help on Cell Dimensions: Cell Dimensions: a = 4.86, b = 5.78, c = 5.02, Z = 2; beta = 90.816° V = 141.00 Den(Calc)= 7.13
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.996(1), 2.954(0.95), 4.84(0.65),
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 0 2) ( 1 1 0) ( 1 0 0) ( 0 1 1)

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Physical Properties of Hubnerite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Brown, Reddish brown, Brownish black.
Help on Density: Density: 7.2 - 7.1, Average = 7.15
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
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 Luster: Luster: Sub Metallic
Help on Streak: Streak: reddish brown

Optical Properties of Hubnerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.019 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1737,KPDmeas= 0.1732,KC= 0.1771
Ncalc = 2.26 - 2.28
Help on Optical Data: Optical Data: Biaxial (+), a=2.17-2.2, b=2.22, g=2.3-2.32, bire=0.1200-0.1300, 2V(Calc)=50-80, 2V(Meas)=73.
Help on Pleochroism (x): Pleochroism (x): yellow, green, or red orange.
Help on Pleochroism (y): Pleochroism (y): yellowish brown, greenish yellow, or red orange.
Help on Pleochroism (z): Pleochroism (z): green, brick red, or red.
Help on RL Anisotrophism: RL Anisotrophism: Distinct.
Help on RL Color: RL Color: White to gray with deep blood red internal reflections.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Hubnerite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   17.10   19.80 
 420 nm   16.30   19.30 
 440 nm   15.50   18.80 
 460 nm   15.10   18.30 
 480 nm   14.60   17.50 
 500 nm   14.40   17.20 
 520 nm   14.20   17.00 
 540 nm   13.90   16.70 
 560 nm   13.80   16.50 
 580 nm   13.70   16.30 
 600 nm   13.60   16.20 
 620 nm   13.50   16.10 
 640 nm   13.50   16.00 
 660 nm   13.40   15.90 
 680 nm   13.40   15.80 
 700 nm   13.30   15.70 
Calculated Relative Intensity Colors of Hubnerite in Air
   0%   70% 100% 140% 210% 280% 350% 420% 490% 560% 630% 640%

Calculated Properties of Hubnerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.17 gm/cc
note: Specific Gravity of Hubnerite =7.13 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PEHubnerite = 762.32 barns/electron
U=PEHubnerite x rElectron Density=4,703.19 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hubnerite is Not Radioactive

Hubnerite 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 Hubnerite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic5)
Help on See Also: See Also: Links to other databases for Hubnerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Glendale Community College
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 04.DB.30





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