Hubnerite Mineral Data

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General Hubnerite Information

Chemical Formula:

MnWO4

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

Empirical Formula:

Mn²⁺(WO₄)

Environment:

Typical of high-temperature hydrothermal vein deposits and pneumatolytically altered granites yielding greisen, granite pegmatites and alluvial deposits.

IMA Status:

Valid Species (Pre-IMA) 1865

Locality:

Erie and Enterprise veins, Ellsworth (Mammoth) district, Nye County, Nevada, USA. Link to MinDat.org Location Data.

Name Origin:

After the German mineralogist, Adolph Huebner.

Name Pronunciation:

Hubnerite + Pronunciation

Synonym:

Huebnerite

Hubnerite Image

Images:

Hubnerite

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

Hubnerite Crystallography

Axial Ratios:

a:b:c =0.8408:1:0.8685

Cell Dimensions:

a = 4.86, b = 5.78, c = 5.02, Z = 2; beta = 90.816° V = 141.00 Den(Calc)= 7.13

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.996(1), 2.954(0.95), 4.84(0.65),

Forms:

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

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Crystal Structure:

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Dachs H , Stoll E , Weitzel H , Zeitschrift fur Kristallographie , 125 (1967) p.120-129, Kristallstruktur und magnetische ordnung des hubnerits, MnWO4, Note: T = 4.2 K, Locality: Henderson, North Carolina, USA

Physical Properties of Hubnerite

Cleavage:

{010} Perfect

Color:

Brown, Reddish brown, Brownish black.

Density:

7.2 - 7.1, Average = 7.15

Diaphaneity:

Transparent to Translucent

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

Luster:

Sub Metallic

Streak:

reddish brown

Optical Properties of Hubnerite

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

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.

Pleochroism (x):

yellow, green, or red orange.

Pleochroism (y):

yellowish brown, greenish yellow, or red orange.

Pleochroism (z):

green, brick red, or red.

RL Anisotrophism:

Distinct.

RL Color:

White to gray with deep blood red internal reflections.

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**
Relative Intensity	0%	70%	100%	140%	210%	280%	350%	420%	490%	560%	630%	640%
R₁
R₂

Calculated Properties of Hubnerite

Electron Density:

Bulk Density (Electron Density)=6.17 gm/cc
note: Specific Gravity of Hubnerite =7.13 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_Hubnerite= 762.32 barns/electron
U=PE_Hubnerite x rElectron Density=4,703.19 barns/cc.

Radioactivity:

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

Hubnerite Classification

Dana Class:

48.01.01.01 (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 Hubnerite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic5)

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 - Glendale Community College
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 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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

Hubnerite

MnWO4
Dana No: 48.01.01.01 Strunz No: 04.DB.30
Locality:

Notes: