Russellite Mineral Data

General Russellite Information

Chemical Formula:

Bi2WO6

Composition:

Molecular Weight = 697.81 gm

Bismuth 59.90 % Bi 66.77 % Bi₂O₃

Tungsten 26.35 % W 33.23 % WO₃

Oxygen 13.76 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Bi₂WO₆

IMA Status:

Valid Species (Pre-IMA) 1938

Locality:

Castle and Dinas mine, St. Columb Major, Cornwall, England. Link to MinDat.org Location Data.

Name Origin:

Named for Arthur Edward Ian Montagu Russell (1878-1964), British mineralogist.

Name Pronunciation:

Russellite + Pronunciation

Russellite Image

Images:

Russellite

Comments: Pale yellowish beige veinlet and thin crusts of russellite.
Location: Himmelfahrt Mine, Steinbach, Johanngeorgenstadt, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Russellite Crystallography

Axial Ratios:

a:b:c =0.3309:1:0.3322

Cell Dimensions:

a = 5.43726, b = 16.43019, c = 5.45842, Z = 4; V = 487.63 Den(Calc)= 9.50

Crystal System:

Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: P ca2₁

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

By Intensity(I/I_o): 3.151(1), 2.738(0.29), 2.729(0.22),

Physical Properties of Russellite

Cleavage:

{???} Good

Color:

Brown orange, Greenish, Greenish yellow, Light yellow.

Density:

7.35

Hardness:

3.5 - Copper Penny

Streak:

white

Optical Properties of Russellite

Gladstone-Dale:

CI meas= -0.027 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.205 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1263,KPDmeas= 0.1633,KC= 0.159
Ncalc = 2.17 - 2.51

Optical Data:

Biaxial (+), b=2.2, 2V(Meas)=0.

Calculated Properties of Russellite

Electron Density:

Bulk Density (Electron Density)=6.07 gm/cc
note: Specific Gravity of Russellite =7.35 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Russellite=1,512.15 barns/electron
U=PE_Russellite x rElectron Density=9,174.22 barns/cc.

Radioactivity:

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

Russellite Classification

Dana Class:

48.02.01.01 (48)Anhydrous Molybdates and Tungstates

(48.02)where (A)2 XO4

(48.02.01)Dana Group

48.02.01.01 Russellite Bi2WO6 P ca2₁ mm2

Strunz Class:

04.DE.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DE -With medium-sized cations; with various polyhedra

04.DE.15 Koechlinite Bi2MoO6 C mca 2/m 2/m 2/m

04.DE.15 Russellite Bi2WO6 P ca2₁ mm2

04.DE.15 Tungstibite Sb2O3•WO3 P 22121 2 2 2

Other Russellite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Russellite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Russellite using:

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

Visit our Advertisers for Russellite :

Ask about Russellite 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 Russellite Specimen Label here :

Russellite

Bi2WO6
Dana No: 48.02.01.01 Strunz No: 04.DE.15
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.