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Mpororoite Mineral Data

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General Mpororoite Information

Help on Chemical  Formula: Chemical Formula: Al(WO3)(OH)3•2(H2O)
Help on Composition: Composition: Molecular Weight = 345.88 gm
   Aluminum   7.80 %  Al   14.74 % Al2O3
   Hydrogen   2.04 %  H    18.23 % H2O
   Tungsten  53.15 %  W    67.03 % WO3
   Oxygen    37.01 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al(WO3)(OH)3•2(H2O)
Help on Environment: Environment: Alteration product of scheelite.
Help on IMA Status: IMA Status: Approved IMA 1972
Help on Locality: Locality: Mpororo tungsten mine, Kigezi, Uganda. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Mpororoite + Pronunciation Say MPOROROITE

Mpororoite Image

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  Mpororoite   Anthoinite

Comments: White chalky massive mpororoite with brown anthoinite.
Location: Kara Mine, Tasmania, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Mpororoite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8202:1:0.7155
Help on Cell Dimensions: Cell Dimensions: a = 9.4, b = 11.46, c = 8.2, Z = 7; alpha = 94.33°, beta = 89.75°, gamma = 95.17° V = 877.22 Den(Calc)= 4.58
Help on Crystal System: Crystal System: Triclinic Space Group: P1 or P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.21(1), 3.08(0.9), 4.2(0.2),5.69(0.2), 6.18(0.2), 2.36(0.1), 4.73(0.1),

Physical Properties of Mpororoite

Help on Color: Color: Greenish yellow.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Powdery - Forms a loose, poorly-coherent pulverulent mass.
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: yellow white

Optical Properties of Mpororoite

Help on Optical Data: Optical Data: NCalc= 1.95 - from Gladstone-Dale relationship (KC = 0.2071) where Ncalc=Dcalc*KC+1

Calculated Properties of Mpororoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.18 gm/cc
note: Specific Gravity of Mpororoite =4.58 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PEMpororoite = 628.09 barns/electron
U=PEMpororoite x rElectron Density=2,628.11 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mpororoite is Not Radioactive

Mpororoite Classification

Help on  Dana Class: Dana Class: (49)Basic and Hydrated Molybdates and Tungstates
  (49.03)(Hydrated, containing Hydroxyl or Halogen)
  (49.03.04)Dana Group Mpororoite Al(WO3)(OH)3•2(H2O) P1 or P1 Tri
Help on  Strunz Class: Strunz Class: 07.GB.35 07 - SULFATES (SELENATES, TELLURATES)
  07.G - Molybdates, Wolframates and Niobates
  07.GB -With additional anions and/or H2O
07.GB.35 Anthoinite AlWO3(OH)3 P1 or P1 Tri
07.GB.35 Mpororoite Al(WO3)(OH)3•2(H2O) P1 or P1 Tri

Other Mpororoite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Mpororoite :
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

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Dana No: Strunz No: 07.GB.35





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