Mpororoite Mineral Data + 
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- 49.3.4.1 Mpororoite Al(WO3)(OH)3·2(H2O) P1 or P1 Tri
- IV/E.02-10 Tungstite WO3·(H2O) Pmnb 2/m 2/m 2/m
- IV/E.02-20 Meymacite WO3·2(H2O) None
- IV/E.02-30 Hydrotungstite H2WO4·(H2O) P 2/m 2/m
- IV/E.02-40 Alumotungstite (W,Al)(O,OH)3(?) Unk Cubic
- IV/E.02-50 Anthoinite AlWO3(OH)3 P1 or P1 Tri
- IV/E.02-60 Mpororoite Al(WO3)(OH)3·2(H2O) P1 or P1 Tri
- IV/E.02-70 Yttrotungstite-(Y) YW2O6(OH)3 P 21/m 2/m
- IV/E.02-75 Yttrotungstite-(Ce)! (Ce,Nd,Y)W2O6(OH)3 P 21/m 2/m
- IV/E.02-80 Cerotungstite-(Ce) CeW2O6(OH)3 P 21/m 2/m
General Mpororoite Information |
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 Chemical Formula: |
Al(WO3)(OH)3·2(H2O) | ||
| 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 | |||
| Empirical Formula: |
Al(WO3)(OH)3·2(H2O) | ||
| Environment: |
Alteration product of scheelite. | ||
| IMA Status: |
Approved IMA 1972 | ||
| Locality: |
Mpororo tungsten mine, Kigezi, Uganda. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
Mpororoite Image | |||
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Images:
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Mpororoite Crystallography |
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| Axial Ratios: |
a:b:c =0.8202:1:0.7155 | ||
| 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 | ||
| Crystal System: |
TriclinicSpace Group: P1 or P1 | ||
| 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 |
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| Color: |
Greenish yellow. | ||
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. | ||
| Habit: |
Powdery - Forms a loose, poorly-coherent pulverulent mass. | ||
| Luster: |
Earthy (Dull) | ||
| Streak: |
yellow white | ||
Optical Properties of Mpororoite |
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| Optical Data: |
NCalc= 1.95 - from Gladstone-Dale relationship (KC = 0.2071) where Ncalc=Dcalc*KC+1 |
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Calculated Properties of Mpororoite |
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| Electron Density: |
relectron=4.18 gm/cc |
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| Fermion Index |
Fermion Index = 0.07608 Boson Index = 0.92392 |
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| Photoelectric: |
PEMpororoite = 628.09 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Mpororoite is Not Radioactive |
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Mpororoite Classification |
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| Dana Class: |
49.3.4.1 (49)Basic and Hydrated Molybdates and Tungstates | ||
| (49.3)(Hydrated, containing Hydroxyl or Halogen) | |||
| (49.3.4)Dana Group | |||
| Strunz Class: |
IV/E.02-60 IV - Oxides | ||
| IV/E - Oxides with metal : oxygen < 1:2 (M2O5, MO3) | |||
| IV/E.02 - Tungstite - Cerotungstite-(Ce) series | |||
Other Mpororoite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) | ||
| See Also: |
Links to other databases for Mpororoite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris Search for Mpororoite using: Visit our Advertisers for Mpororoite : Translate Mpororoite Mineral Data : Ask about Mpororoite here : Print or Cut-and-Paste your Mpororoite Specimen Label here :
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