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(Fe2+,Ba,Pb)(UO2)2(WO4)(OH)4 · 12H2O
Yellow, orange, brown
Pearly, Dull
Crystal System:
The name reflects its composition: Uranium and Tungsten.
The correct crystal symmetry of uranotungstite is monoclinic, not orthorhombic, space group P21/m (Uwe Kolitsch and Jakub Plášil, work in progress); the original formula is also incorrect.

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Classification of UranotungstiteHide

Approval Year:

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
H : Uranium and uranyl molybdates and wolframates
B : With U6+

3 : Hydrated Molybdates and Tungstates Containing Hydroxyl or Halogen

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

Physical Properties of UranotungstiteHide

Pearly, Dull
Yellow, orange, brown

Optical Data of UranotungstiteHide

Biaxial (-)
RI values:
nα = 1.682 nβ = 1.845 nγ = 1.855
Measured: 42° , Calculated: 24°
Max Birefringence:
δ = 0.173
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
r > v moderate

Chemical Properties of UranotungstiteHide

(Fe2+,Ba,Pb)(UO2)2(WO4)(OH)4 · 12H2O
IMA Formula:
Fe(UO2)2WO4(OH)4 · 12H2O

Crystallography of UranotungstiteHide

Crystal System:
Cell Parameters:
a = 9.22 Å, b = 13.81 Å, c = 7.17 Å
a:b:c = 0.668 : 1 : 0.519
Unit Cell V:
912.94 ų (Calculated from Unit Cell)

Type Occurrence of UranotungstiteHide

Synonyms of UranotungstiteHide

Other Language Names for UranotungstiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Metatorbernite2 photos of Uranotungstite associated with Metatorbernite on
Gearksutite2 photos of Uranotungstite associated with Gearksutite on
Prosopite1 photo of Uranotungstite associated with Prosopite on

Related Minerals - Nickel-Strunz GroupingHide

7.HB.15Calcurmolite(Ca,Na)2(UO2)3Mo2(O,OH)11 · nH2O
7.HB.20TengchongiteCaO · 6UO3 · 2MoO3 · 12H2OOrth.

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
27.4.5MpororoiteWAlO3(OH)3 · 2(H2O)
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
27.4.13HübneriteMnWO4Mon. 2/m : P2/b
27.4.14FerberiteFeWO4Mon. 2/m : P2/b
27.4.15Wolframite(Fe2+)WO4 to (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

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 UranotungstiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Walenta, K. (1985): Uranotungstit, ein neues sekundäres Uranmineral aus dem Schwarzwald. Tschermaks Mineralogische und Petrographische Mitteilungen: 34, 25-34. (in German).
American Mineralogist (1986): 71: 1547.

Internet Links for UranotungstiteHide

Localities for UranotungstiteHide

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.
  • Auvergne-Rhône-Alpes
    • Allier
      • Ébreuil
        • Échassières
Le Règne Minéral, (33), 5-25.
Germany (TL)
  • Baden-Württemberg
    • Black Forest
      • Menzenschwand
Tscherm.Min.Petr.Mitt.(1985) 34, 25-34
      • Wolfach
        • Oberwolfach
          • Rankach valley
Walenta, K. (1985): Uranotungstit, ein neues sekundäres Uranmineral aus dem Schwarzwald. Tschermaks Mineral. Petrogr. Mitt., 34, 25-34. (in German); Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German)
  • Erongo Region
    • Dâures
Schnaitmann, E. A., Nägele, H., Niedermayr, G., Brandstätter, F. & Jahn, S. (2007): Das Metazeunerit-Pocket auf Tubussis 22, Erongo. Mineralien-Welt 18 (2), 33-43. (in German)
    • Karibib
Bezing, L. von, Bode, R. & Jahn, S. (2008): Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern, 321 pp. (in English)
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