Krasnogorite Mineral Data

General Krasnogorite Information

Chemical Formula:

WO3

Composition:

Molecular Weight = 231.85 gm

Tungsten 79.30 % W 100.00 % WO₃

Oxygen 20.70 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

WO₃

Environment:

Occur as pseudomorphs after hard alloy VK8 (92o/oW C,80/oCo) on the plates of the cutting element of a drilling machine found in burned rocks. Dehydrated tungstite?

IMA Status:

Not Submitted IMA

Locality:

Krasnoselskaya mine in Krasnogorsk, Chelyabinsk basin, Ural Mountains, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

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Krasnogorite Crystallography

Axial Ratios:

a:b:c =0.9814:1:0.5099

Cell Dimensions:

a = 7.39, b = 7.53, c = 3.84, Z = 4; V = 213.68 Den(Calc)= 7.21

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmnb

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

By Intensity(I/I_o): 3.769(1), 3.848(1), 3.656(0.86),

Physical Properties of Krasnogorite

Color:

Gray, Bluish gray.

Density:

6.62

Fracture:

Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Habit:

Pseudomorphous - Occurs in the form of another mineral.

Hardness:

4 - Fluorite

Luster:

Earthy (Dull)

Streak:

bluish gray

Optical Properties of Krasnogorite

Optical Data:

NCalc= 2.23 - from Gladstone-Dale relationship (KC = 0.171) where Ncalc=Dcalc*KC+1
NCalc= 2.13 - from Gladstone-Dale relationship (KC = 0.171) where Ncalc=Dmeas*KC+1

Calculated Properties of Krasnogorite

Electron Density:

Bulk Density (Electron Density)=6.10 gm/cc
note: Specific Gravity of Krasnogorite =7.21 gm/cc.

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_Krasnogorite=1,012.11 barns/electron
U=PE_Krasnogorite x rElectron Density=6,168.99 barns/cc.

Radioactivity:

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

Krasnogorite Classification

Dana Class:

04.00.00.00 (04)Oxide Minerals

(04.00)Without Dana Classification Numbers

(04.00.00)Oxide

04.00.00.00 Ashanite? (Nb,Ta,U,Fe,Mn)4O8 Pcan 2/m 2/m 2/m

04.00.00.00 Chubutite* Pb7O6Cl2 Unk Ortho

04.00.00.00 Clinobirnessite* Na4Mn14O27•9(H2O) Mono

04.00.00.00 Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m

04.00.00.00 IMA2008-022 UO2(OH)2 pseudo-orthorhombic Mono

04.00.00.00 Krasnogorite* WO3 Pmnb 2/m 2/m 2/m

04.00.00.00 Mengxianminite* (Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29 Unk Ortho

04.00.00.00 Romanite* (Fe,U,Pb)2(Ti,Fe)O4 Trig ? Trig

04.00.00.00 Tantalowodginite* (Mn2,[])4Ta4Ta8O32 C 2/c 2/m

04.00.00.00 Ungursaite* NaCa5(Ta,Nb)24O65(OH) P 6₃/m,P 6₃ Hex

04.00.00.00 Wolframoixiolite* (Fe,Mn,Nb)(Nb,W,Ta)O4 Pc m

Strunz Class:

04.EA.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.E - Metal:Oxygen = < 1:2

04.EA -Oxides with metal : oxygen < 1:2 (M2O5, MO3)

04.EA.10 Krasnogorite* WO3 Pmnb 2/m 2/m 2/m

04.EA.10 Molybdite MoO3 Pbnm 2/m 2/m 2/m

Other Krasnogorite Information

References:

NAME( AmMin, 78:672) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996)

See Also:

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

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

Krasnogorite

WO3
Dana No: 04.00.00.00 Strunz No: 04.EA.10
Locality:

Notes: