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Mpororoite

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About MpororoiteHide

Formula:
WAlO3(OH)3 · 2(H2O)
Colour:
Greenish yellow
Crystal System:
Triclinic
Name:
Named by O. von Knorring, T.G. Sahama, and M. Lehtinen in 1972 for the type locality; the Mpororo tungsten deposit in Uganda.
This page provides mineralogical data about Mpororoite.


Classification of MpororoiteHide

Approved
First Published:
1972
7.GB.35

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
G : Molybdates, Wolframates and Niobates
B : With additional anions and/or H2O
49.3.4.1

49 : HYDRATED MOLYBDATES AND TUNGSTATES
3 : Hydrated Molybdates and Tungstates Containing Hydroxyl or Halogen
27.4.5

27 : Sulphites, Chromates, Molybdates and Tungstates
4 : Tungstates

Physical Properties of MpororoiteHide

Transparency:
Transparent
Colour:
Greenish yellow

Chemical Properties of MpororoiteHide

Formula:
WAlO3(OH)3 · 2(H2O)
IMA Formula:
Al2O(WO4)2 · 6H2O

Crystallography of MpororoiteHide

Crystal System:
Triclinic
Cell Parameters:
a = 9.4 Å, b = 11.46 Å, c = 8.2 Å
α = 94.2°, β = 89.45°, γ = 95.1°
Ratio:
a:b:c = 0.82 : 1 : 0.716
Unit Cell V:
877.47 ų (Calculated from Unit Cell)
Comment:
Questionable

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.21 Å(100)
6.18 Å(16)
5.69 Å(18)
4.20 Å(17)
4.09 Å(19)
3.084 Å(90b)
2.357 Å(15)

Type Occurrence of MpororoiteHide

General Appearance of Type Material:
Platy, very fine grained, powdery.
Geological Setting of Type Material:
Alteration products from a tungsten deposit
Associated Minerals at Type Locality:

Synonyms of MpororoiteHide

Other Language Names for MpororoiteHide

German:Mpororoit
Spanish:Mpororoita

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Mpororoite associated with AnthoiniteAlWO3(OH)3

Related Minerals - Nickel-Strunz GroupingHide

7.GB.05LindgreniteCu3(MoO4)2(OH)2Mon. 2/m : P21/m
7.GB.10SzenicsiteCu3(MoO4)(OH)4Orth.
7.GB.15CuprotungstiteCu2(WO4)(OH)2Tet. 4 2 2 : P41 21 2
7.GB.15UM1999-38-WO:CrV(V, Cr, W, O, H) [V:Cr:W ratio about 2:1:3]
7.GB.20Phyllotungstite(H2O,M)x(W,Fe)(O,OH)3 · yH2O (M = Ca, Cs, Pb or K)Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
7.GB.25RankachiteCa0.5(V4+,V5+)(W6+,Fe3+)2O8(OH) · 2H2OMon. 2/m : P21/m
7.GB.30FerrimolybditeFe2(MoO4)3 · nH2OOrth. mmm (2/m 2/m 2/m) : Pmmn
7.GB.35AnthoiniteAlWO3(OH)3Tric. 1
7.GB.40Obradovicite-KCu[K2(H2O)17Cu(H2O)6][Mo8As2Fe3+3O34(OH)3]Orth. mmm (2/m 2/m 2/m) : Pmna
7.GB.45Mendozavilite-NaFe[Na2(H2O)15Fe3+(H2O)6][Mo8P2Fe3+3O35(OH)2]Mon. 2/m : B2/m
7.GB.45Paramendozavilite[KAl4(H2O)30][Mo12P6Fe3+6O60(OH)13]Mon.
7.GB.50Tancaite-(Ce)FeCe(MoO4)3·3H2O Trig. 3 : R3

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

27.4.1CuprotungstiteCu2(WO4)(OH)2Tet. 4 2 2 : P41 21 2
27.4.2ScheeliteCa(WO4)Tet. 4/m : I41/a
27.4.4AnthoiniteAlWO3(OH)3Tric. 1
27.4.6Yttrotungstite-(Y)YW2O6(OH)3Mon. 2/m : P21/m
27.4.7Yttrotungstite-(Ce)(Ce,Nd,Y)W2O6(OH)3Mon. 2 : P21
27.4.8StolzitePb(WO4)Tet. 4/m : I41/a
27.4.9RaspitePb(WO4)Mon. 2/m : P21/b
27.4.10RusselliteBi2WO6Orth.
27.4.11PinalitePb3WO5Cl2Orth.
27.4.12Uranotungstite(Fe2+,Ba,Pb)(UO2)2(WO4)(OH)4 · 12H2OOrth.
27.4.13HübneriteMnWO4Mon. 2/m : P2/b
27.4.14FerberiteFeWO4Mon. 2/m : P2/b
27.4.15Wolframite(Fe2+)WO4to (Mn2+)WO4Mon. 2/m : P2/b
27.4.16FerritungstiteIso. m3m (4/m 3 2/m) : Fd3m
27.4.17Phyllotungstite(H2O,M)x(W,Fe)(O,OH)3 · yH2O (M = Ca, Cs, Pb or K)Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
27.4.18Qitianlingite(Fe,Mn)2(Nb,Ta)2WO10Orth.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for MpororoiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
von Knorring, O., Sahama, T.G., Lehtinen, M. (1972) Mpororoite, a new secondary tungsten mineral from Uganda. Bulletin of the Geological Society of Finland: 44: 107-110.
Fleischer, M. (1973) New mineral names. American Mineralogist: 58: 1111-1115.
Sahama, T.G. (1981) The secondary tungsten minerals, a review. The Mineralogical Record: 12: 81-87.
Matsubara, S., Kato, A., Nagashima, K. (1984) Mpororoite and Anthoinite from the Kara Mine, Tasmania. Mineralogical Magazine: 48: 397-400.
Dunn, P.J., Ferraiolo, J.A., Fleischer, M., Gobel, V., Grice, J.D., Langley, R.H., Shigley, J.E., Vanko, D.A., Zilczer, J.A. (1985) New mineral names. American Mineralogist: 70: 1329-1335.
Shimobayashi, N., Ohnishi, M., Tsuruta, K. (2012) Secondary tungsten minerals in quartz veins in the Ishidera area, Wazuka, Kyoto Prefecture, Japan: anthoinite, mpororoite, and Fe-free hydrokenoelsmoreite. Journal of Mineralogical and Petrological Sciences: 107: 33-38.

Internet Links for MpororoiteHide

Localities for MpororoiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • Tasmania
    • Burnie City
      • Hampshire district
        • Kara Mines
Whitehead, 1990; Ralph Bottrill 6/10/2005.; MINERALOGICAL MAGAZINE, SEPTEMBER 1984, VOL. 48, PP. 397-400
Canada
 
  • Yukon
    • Mayo mining district
      • Mayo
        • Kalzas Mt
J.W. Anthony, R.A. Bideaux, K.W. Bladh, M.C. Nichols: Handbook of Mineralogy, Vol. III (1997); T. S. Ercit and G. W. Robinson (1994) A refinement of the structure of ferritungstite from Kalzas Mountain, Yukon, and observations on the tungsten pyrochlores. Can Mineral 32:567-574
Japan
 
  • Kyoto Prefecture
    • Soraku District
      • Wazuka-cho
SHIMOBAYASHI, N., OHNISHI, M., and TSURUTA, K. (2012) Secondary tungsten minerals in quartz veins in the Ishidera area, Wazuka, Kyoto Prefecture, Japan: anthoinite, mpororoite, and Fe-free hydrokenoelsmoreite. Journal of Mineralogical and Petrological Sciences, 107, No. 1 (February), 33-38.
Uganda (TL)
 
  • Western Region
    • Kisoro
O. von Knorring, T.G. Sahama, M. Lehtinen: Bull. Geol. Soc. Finland 44:107-110 (1972); Amer. Mineral. 58:1112 (1973); MINERALOGICAL MAGAZINE, SEPTEMBER 1984, VOL. 48, PP. 397-400
UK
 
  • England
    • Cornwall
      • Calstock
        • Gunnislake
Golley, P., and Williams, R. (1995): Cornish Mineral Reference Manual. Endsleigh Publications (Truro), 104 pp.; Weiss, S., Green, D.H., Hooper, J.J., and Elton, N. (2007): Lapis 32(11), 13-25
 
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