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(Pb,Ca)U2O7 · 2H2O
Orange-red, bright ...
Named after its discovery locality, Wölsendorf, Bavaria, Germany.
This page provides mineralogical data about Wölsendorfite.

Classification of Wölsendorfite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
B : With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra

4 : AX2O7·xH2O

7 : Oxides and Hydroxides
16 : Oxides of U URL:
Please feel free to link to this page.

Type Occurrence of Wölsendorfite

Year of Discovery:

Physical Properties of Wölsendorfite

Orange-red, bright carmine-red
Hardness (Mohs):

Crystallography of Wölsendorfite

Crystal System:
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Cell Parameters:
a = 14.131(1) Å, b = 13.885(1) Å, c = 55.969(4) Å
a:b:c = 1.018 : 1 : 4.031
Unit Cell Volume:
V 10982 ų
Previously reported unit cell, a = 11.95, b = 13.99, c = 7.02 A, is possibly a subcell (or that of a polytype?)

Optical Data of Wölsendorfite

RI values:
nα = 2.050 nγ = 2.090
Max Birefringence:
δ = 0.040
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
r < v strong

Chemical Properties of Wölsendorfite

(Pb,Ca)U2O7 · 2H2O
Essential elements:
All elements listed in formula:

Relationship of Wölsendorfite to other Species

4.GB.05AgrinieriteK2(Ca,Sr)[(UO2)3O3(OH)2]2 · 5H2O
4.GB.05CompreignaciteK2(UO2)6O4(OH)6 · 7H2O
4.GB.05RameauiteK2Ca(UO2)6(OH)16 · H2O
4.GB.10BecquereliteCa(UO2)6O4(OH)6 · 8H2O
4.GB.10BillietiteBa(UO2)6O4(OH)6 · 4-8H2O
4.GB.10ProtasiteBa(UO2)3O3(OH)2 · 3H2O
4.GB.15Richetite(Fe3+,Mg)Pb 8.6(UO2)36O36(OH)24•41H2O
4.GB.20BauranoiteBa(UO2)2(OH)6 · 1-2H2O
4.GB.20Calciouranoite(Ca,Ba,Pb)U2O7 · 5H2O
4.GB.20Metacalciouranoite(Ca,Ba,Pb,K2)U2O7 · 2H2O
4.GB.25FourmarieritePb(UO2)4O3(OH)4 · 4H2O
4.GB.35MasuyitePb(UO2)3O3(OH)2 · 3H2O
4.GB.40MetavandendriesscheitePbU7O22 · nH2O n < 12
4.GB.40VandendriesscheitePbU7O22 · 12H2O
4.GB.50SayritePb2(UO2)5O6(OH)2 · 4H2O
4.GB.55CuritePb3(UO2)8O8(OH)6 · 3H2O
4.GB.60Iriginite(UO2)Mo2O7 · 3H2O
4.GB.70HolfertiteCaxU6+2-xTi(O8-xOH4x) · 3H2O
7.16.2Schoepite(UO2)8O2(OH)12 · 12H2O
7.16.3ParaschoepiteUO3 · 2H2O
7.16.4MetaschoepiteUO3 · 1-2H2O
7.16.5MetastudtiteUO4 · 2H2O
7.16.6Studtite[(UO2)(O2)(H2O)2] · H2O
7.16.7IanthiniteU4+(UO2)5O7 · 10H2O
7.16.8CompreignaciteK2(UO2)6O4(OH)6 · 7H2O
7.16.11BecquereliteCa(UO2)6O4(OH)6 · 8H2O
7.16.12RameauiteK2Ca(UO2)6(OH)16 · H2O
7.16.13AgrinieriteK2(Ca,Sr)[(UO2)3O3(OH)2]2 · 5H2O
7.16.14ProtasiteBa(UO2)3O3(OH)2 · 3H2O
7.16.15BillietiteBa(UO2)6O4(OH)6 · 4-8H2O
7.16.16BauranoiteBa(UO2)2(OH)6 · 1-2H2O
7.16.17Metacalciouranoite(Ca,Ba,Pb,K2)U2O7 · 2H2O
7.16.18Calciouranoite(Ca,Ba,Pb)U2O7 · 5H2O
7.16.24FourmarieritePb(UO2)4O3(OH)4 · 4H2O
7.16.25Richetite(Fe3+,Mg)Pb 8.6(UO2)36O36(OH)24•41H2O
7.16.26CuritePb3(UO2)8O8(OH)6 · 3H2O
7.16.27MasuyitePb(UO2)3O3(OH)2 · 3H2O
7.16.28VandendriesscheitePbU7O22 · 12H2O
7.16.29MetavandendriesscheitePbU7O22 · nH2O n < 12
7.16.30SayritePb2(UO2)5O6(OH)2 · 4H2O
7.16.32Clarkeite(Na,Ca,Pb)(UO2)O(OH) · 0-1H2O

Other Names for Wölsendorfite

Name in Other Languages:

Other Information

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 Wölsendorfite

Reference List:
Comptes Rendus Hebdomadaires des Séances de l’ Académie des Sciences de Paris (1957): 244: 2942-2944.

American Mineralogist (1957): 42: 919.

Vochten, R. and L. Van Haverbeke (1990): Transformation of schoepite into the uranyl oxide hydrates: becquerelite, billietite and wölsendorfite: Mineralogy and Petrology: 43: 65-72.

Burns, P.C. (1999): A new sheet complex sheet of uranyl polyhedra in the structure of wölsendorfite. American Mineralogist 84: 1661-1673.

Burns, P.C. (2005): U6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.

Internet Links for Wölsendorfite

Localities for Wölsendorfite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
  • Northern Territory
    • West Arnhem Region
      • Kakadu
  • Minas Gerais
    • Doce valley
      • Galiléia
Mineralogical Record: 17: 313.; Atencio D, Carvalho F M S, Matioli P A (2004) Coutinhoite, a new thorium uranyl silicate hydrate, from Urucum Mine, Galiléia, Minas Gerais, Brazil. American Mineralogist 89, 721-724
  • Northwest Territories
    • Mackenzie District
      • Great Bear Lake
American Mineralogist (1957): 42: 919.
  • Nunavut Territory
    • Kivalliq Region
      • Baker Lake
Miller A. (1980) Uranium Geology of the Eastern Baker Lake Basin, District of Keewatin, Northwest Territories; G.S.C. Bulletin 330.
Czech Republic
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
      • Krásná Hora nad Vltavou (Schönberg)
Litochleb, J.: Wolsendorfit z Milešova u Krásné Hory. Časopis pro mineralogii a geologii, 1986, roč. 31, č. 4, s. 436.
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
        • Březové Hory ore region (Birkenberg)
          • Březové Hory deposit
Ondruš, P. & Hyršl, J. (1989): New finds and revision of secondary minerals from Příbram district. Acta Universitatis Carolinae, Geologica 1989, 521-533.; Ondrus+Hyrsl (1989)
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
Lapis 2002(7/8), 63-65
  • Moravia (Mähren; Maehren)
    • Olomouc Region
      • Javorník (Jauernig)
        • Horní Hostice
No reference listed
Sejkora, J.: Uranové ložisko Zálesí v Rychlebských horách. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1994, roč. 2, s. 105-110.
    • Vysočina Region
      • Nové Město na Moravě
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
Democratic Republic of Congo (Zaïre)
  • Katanga (Shaba)
    • Katanga Copper Crescent
      • Shinkolobwe
[MinRec 20:287-288]; American Mineralogist (1957): 42: 919.
  • Alsace
    • Haut-Rhin
      • Thur valley (Thann valley)
        • Kruth
Hohl: "Minéraux et Mines du Massif Vosgien", Editions du Rhin (Mulhouse), 1994
  • Brittany
    • Morbihan
      • Lignol
R. Pierrot, L. Chauris, C Laforêt and F. Pillard : "Inventaire Minéralogique de la France N° 9 : Morbihan", BRGM, 1980.
  • Burgundy
    • Saône-et-Loire
      • Issy-l'Evêque
        • Grury
Le Règne Minéral, Hors Série IV, 1998
  • Limousin
    • Haute-Vienne
      • Compreignac
Le Règne Minéral, Hors Série IV, 1998
Le Règne Minéral, Hors Série IV (1998)
  • Haut-Ogooué Province
    • Franceville
Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392
  • Baden-Württemberg
    • Black Forest
      • Menzenschwand
Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
      • Schenkenzell
        • Wittichen
          • Burgfelsen
No reference listed
          • Heubach Valley
No reference listed
K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
  • Bavaria
    • Franconia
      • Fichtelgebirge
        • Weißenstadt
          • Großschloppen
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Upper Palatinate
American Mineralogist (1957): 42: 919.
        • Wölsendorf East District
          • Schwarzach bei Nabburg
            • Wölsendorf
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
  • Saxony
    • Vogtland
      • Oelsnitz
Gröbner, J. and Kolitsch, U. (2007): The minerals of the uranium prospect at Tirpersdorf, Vogtland. Lapis 32, 37-42; 58. (in German)
  • Tunu Province (East Greenland)
Beddoe-Stephens, B., Secher, C. (1982): Barian Wölsendorfite from East Greenland, Mineralogical Magazine, Vol. 46, 130-132
  • Trentino-Alto Adige (Trentino-Südtirol)
    • Trento Province
      • Giudicarie Valleys
        • Rendena Valley
          • Bocenago & Spiazzo
- Ravagnani D.(1974): I giacimenti uraniferi italiani e i loro minerali. Gruppo Mineralogico Italiano Ed., Milano (pagg.188).
  • Telemark
    • Tokke
      • Klauvreid
Larsen. A.O. & Åsheim, A. (2008): Klauvreid pegmatittbrudd, del 1: Geologi og mineralogi. Norsk Bergverksmuseum Skrift. 38, 49-56.
  • Eastern-Siberian Region
    • Transbaikalia (Zabaykalye)
      • Chitinskaya Oblast'
        • Krasnokamensk
P.M. Kartashov data
  • Lappland
    • Arjeplog
No reference listed
    • Ultevis
No reference listed
  • Södermanland
    • Nyköping
  • Värmland
    • Torsby
Löfvendahl, R: (1981): Secondary uranium minerals in Sweden. Sveriges Geologiska Undersökning C779, 20
  • Wallis (Valais)
    • Le Trient Valley
      • Les Marécottes
- Meisser, N. (2012): La minéralogie de l'uranium dans le massif des Aiguilles Rouges. Matér. Géol. Suisse, Sér. géotech. 96, 183 p.
  • England
    • Cornwall
      • St Just District
        • St Just
          • Botallack
            • Wheal Owles
[Journal of the Russell Society, 6(1), 17-26 (1995)]
  • Colorado
    • Grand Co.
      • Wheeler Basin
Minerals of Colorado (1997) Eckel, E. B.
  • Maine
    • Oxford Co.
      • Greenwood
King & Foord, 1994. Mineralogy of Maine, Vol.1, p.372.
      • Newry
King, V. and Foord, E., 1994, Mineralogy of Maine, V. 1; King, V. (ed), 2000, Mineralogy of Maine, V. 2.
  • North Carolina
    • Mitchell Co.
Finch,Robert J. and Ewing, Rodney C. (1997) Clarkeite: New chemical and structural data: American Mineralogist,Vol.82,pg 607-619,1997
Finch,Robert J. and Ewing,Rodney C.(1997) Clarkeite:New chemical and structural data, America Mineralogist,Vol.82 pg. 607-619,1997
      • Spruce Pine District
        • Spruce Pine
          • Greasy Creek Township
Finch,Robert J. and Ewing,Rodney C.(1997) Clarkeite: New chemical and structural data; American Mineralogist, Vol.82, pg. 607-619,1997
    • Yancey Co.
      • Spruce Pine District
        • Celo
          • Micaville
Finch,Robert J. and Ewing,Rodney C. (1997) Clarkeite:New chemical and structural data , American Mineralogist,Vol. 82,pg 607-619,1997
  • Pennsylvania
    • Northampton Co.
      • Forks Township
        • Easton
          • Chestnut Hill
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