Elsmoreite Mineral Data

General Elsmoreite Information

Chemical Formula:

WO3•0.5(H2O)

Composition:

Molecular Weight = 239.77 gm

Hydrogen 0.37 % H 3.31 % H₂O

Tungsten 76.68 % W 96.69 % WO₃

Oxygen 22.95 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

WO₃•0.44(H₂O)

Environment:

Formed as a result of the oxidation of ferberite in the oxidized zone of weakly mineralized Sn, W, Mo, Bi granitic pegmatite dykes. Related to ferritungstite

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Elsmore tin deposit in Elsmore Hill, 17 km east of Inverell and adjacent to the village of Elsmore, New England region, New South Wales, Australia Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

IMA2003-059

Elsmoreite Crystallography

Cell Dimensions:

a = 10.203, Z = 16; V = 1,062.15 Den(Calc)= 6.00

Crystal System:

Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m

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

By Intensity(I/I_o): 5.88(1)(111), 2.944(0.78)(222), 3.08(0.62)(311),1.804(0.23)(440), 1.964(0.17)(511), 1.538(0.14)(622), 1.725(0.14)(531), 2.551(0.12)(400),

Physical Properties of Elsmoreite

Cleavage:

None

Color:

White.

Diaphaneity:

Translucent

Fracture:

Brittle - Splintery - Brittle fracture leaving splintery fragments.

Habit:

Powdery - Forms a loose, poorly-coherent pulverulent mass.

Hardness:

3 - Calcite

Luster:

Adamantine

Streak:

white

Optical Properties of Elsmoreite

Gladstone-Dale:

CI calc= -0.17 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2067,KC= 0.1766
Ncalc = 2.06

Optical Data:

Isotropic, n=2.24.

Calculated Properties of Elsmoreite

Electron Density:

Bulk Density (Electron Density)=5.12 gm/cc
note: Specific Gravity of Elsmoreite =6.00 gm/cc.

Fermion Index:

Fermion Index = 0.1
Boson Index = 0.9

Photoelectric:

PE_Elsmoreite= 968.63 barns/electron
U=PE_Elsmoreite x rElectron Density=4,964.06 barns/cc.

Radioactivity:

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

Elsmoreite Classification

Dana Class:

04.05.05.02 (04)Simple Oxides

(04.05)with a cation charge of 6+ (A++++++ O3)

(04.05.05)Dana Group

04.05.05.01 Ferritungstite (K,Ca,Na)(W,Fe)2(O,OH)6•(H2O) F d3m 4/m 3 2/m

04.05.05.02 Elsmoreite! WO3•0.5(H2O) F d3m 4/m 3 2/m

Strunz Class:

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

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

04.DH -With large (ï¿½ medium-sized) cations; sheets of edge-sharing octahedra

04.DH.15 Alumotungstite (W,Al)(O,OH)3(?) Unk Cubic

04.DH.15 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Ferritungstite (K,Ca,Na)(W,Fe)2(O,OH)6•(H2O) F d3m 4/m 3 2/m

04.DH.15 Cesstibtantite (Cs,Na)SbTa4O12 F d3m 4/m 3 2/m

04.DH.15 Bismutomicrolite (Bi,Ca)(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m

04.DH.15 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Bariomicrolite Ba(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Jixianite Pb(W,Fe)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Plumbomicrolite (Pb,Ca,U)2Ta2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6•(H2O,K) F d3m 4/m 3 2/m

04.DH.15 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Uranmicrolite (U,Ca)2(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m

04.DH.15 Microlite (Na,Ca)2Ta2O6(O,OH,F) F d3m 4/m 3 2/m

04.DH.15 Natrobistantite (Na,Cs)Bi(Ta,Nb,Sb)4O12 F d3m 4/m 3 2/m

04.DH.15 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m

04.DH.15 Stibiomicrolite (Sb,Ca,Na)2(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Stannomicrolite (Sn,Fe,Mn)(Ta,Nb,Sn)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m

04.DH.15 Bismutopyrochlore! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)•n(H2O) F d3m 4/m 3 2/m

04.DH.15 Fluornatromicrolite! (Na,Ca,Bi)2Ta2O6F F d3m 4/m 3 2/m

04.DH.15 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3

04.DH.15 Elsmoreite! WO3•0.5(H2O) F d3m 4/m 3 2/m

Other Elsmoreite Information

References:

NAME( AmMin, v91, p217) PHYS. PROP.(AmMin, v91, p217) OPTIC PROP.(AmMin, v91, p217)

See Also:

Links to other databases for Elsmoreite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Elsmoreite

WO3•0.5(H2O)
Dana No: 04.05.05.02 Strunz No: 04.DH.15
Locality:

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