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[(UO2)(O2)(H2O)2] · H2O
Very pale yellow to yellow
Crystal System:
Named after Franz Edward Studt (or Stüdt). Dinah Pantic writes in "Frank Edward Studt was my grandfather. He was trained as a metallurgist and graduated from imperial college in London about 1898. He was English and his parents originally from Germany. After graduating he worked in the belgium Congo for about 20 years for a Belgium company. I have many of his original diaries from this time"
A rare secondary uranium mineral containing a peroxide group in its crystal structure.
May dehydrate to metastudtite.

Hide all sections | Show all sections

Classification of StudtiteHide

Approved, 'Grandfathered' (first described prior to 1959)

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
A : Without additional cations

3 : AXO4·xH2O

7 : Oxides and Hydroxides
16 : Oxides of U

Physical Properties of StudtiteHide

Transparent, Translucent
Very pale yellow to yellow

Optical Data of StudtiteHide

Biaxial (+)
RI values:
nα = 1.545 nβ = 1.555 nγ = 1.680
Max Birefringence:
δ = 0.135
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of StudtiteHide

[(UO2)(O2)(H2O)2] · H2O
IMA Formula:
(UO2)O2(H2O)2 · 2H2O
Idealised Formula:
UO4 · 4H2O

Crystallography of StudtiteHide

Crystal System:
Cell Parameters:
a = 11.85 Å, b = 6.78 Å, c = 4.24 Å
β = 93.62°
a:b:c = 1.748 : 1 : 0.625
Unit Cell V:
339.97 ų (Calculated from Unit Cell)
Crusts and radial aggregates of flexible, fibrous crystals.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
5.93 (10)
4.27 (4)
3.40 (8)
2.96 (6)
2.23 (6)
2.02 (5)
1.970 (5b)

Type Occurrence of StudtiteHide

Other Language Names for StudtiteHide


Common AssociatesHide

Associated Minerals Based on Photo Data:
Uranophane9 photos of Studtite associated with Uranophane on
Fourmarierite7 photos of Studtite associated with Fourmarierite on
Uraninite7 photos of Studtite associated with Uraninite on
Phosphuranylite6 photos of Studtite associated with Phosphuranylite on
Becquerelite4 photos of Studtite associated with Becquerelite on
Lepersonnite-(Gd)4 photos of Studtite associated with Lepersonnite-(Gd) on
Baryte3 photos of Studtite associated with Baryte on
Rutherfordine3 photos of Studtite associated with Rutherfordine on
Uranophane-β2 photos of Studtite associated with Uranophane-β on
Curite2 photos of Studtite associated with Curite on

Related Minerals - Nickel-Strunz GroupingHide

4.GA.05Metaschoepite(UO2)8O2(OH)12 · 10H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
4.GA.05ParaschoepiteUO3 · 2H2OOrth.
4.GA.05Schoepite(UO2)8O2(OH)12 · 12H2OOrth. mmm (2/m 2/m 2/m) : Pbca
4.GA.10IanthiniteU4+(UO2)5O7 · 10H2OOrth. mm2 : Amm2
4.GA.15MetastudtiteUO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnma

Related Minerals - Dana Grouping (8th Ed.)Hide · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnma

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

7.16.1UraniniteUO2Iso. m3m (4/m 3 2/m) : Fm3m
7.16.2Schoepite(UO2)8O2(OH)12 · 12H2OOrth. mmm (2/m 2/m 2/m) : Pbca
7.16.3ParaschoepiteUO3 · 2H2OOrth.
7.16.4Metaschoepite(UO2)8O2(OH)12 · 10H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
7.16.5MetastudtiteUO4 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnma
7.16.7IanthiniteU4+(UO2)5O7 · 10H2OOrth. mm2 : Amm2
7.16.8CompreignaciteK2(UO2)6O4(OH)6 · 7H2OOrth.
7.16.9VandenbrandeiteCu(UO2)(OH)4Tric. 1 : P1
7.16.10RoubaultiteCu2(UO2)3(CO3)2O2(OH)2•4H2OTric. 1 : P1
7.16.11BecquereliteCa(UO2)6O4(OH)6 · 8H2OOrth. mm2 : Pna21
7.16.12RameauiteK2Ca(H[3]2O)(H[5]2O)4[(UO2)6O6(OH)4](H[4]2O)Mon. m : Bb
7.16.13AgrinieriteK2(Ca,Sr)[(UO2)3O3(OH)2]2 · 5H2OOrth.
7.16.14ProtasiteBa(UO2)3O3(OH)2 · 3H2OMon.
7.16.15BillietiteBa(UO2)6O4(OH)6 · 4-8H2OOrth. mm2
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
7.16.22Davidite-(Ce)(Ce,La)(Y,U,Fe)(Ti,Fe)20(O,OH)38Trig. 3 : R3
7.16.23Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6Mon. 2/m : B2/m
7.16.24FourmarieritePb(UO2)4O3(OH)4 · 4H2OOrth.
7.16.25Richetite(Fe3+,Mg)Pb 8.6(UO2)36O36(OH)24•41H2O Tric.
7.16.26CuritePb3(UO2)8O8(OH)6 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pnma
7.16.27MasuyitePb(UO2)3O3(OH)2 · 3H2OOrth.
7.16.28VandendriesscheitePbU7O22 · 12H2O
7.16.29MetavandendriesscheitePbU7O22 · nH2O n < 12Orth.
7.16.30SayritePb2(UO2)5O6(OH)2 · 4H2OMon.
7.16.31WölsendorfitePb7(UO2)14O19(OH)4 · 12H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
7.16.32Clarkeite(Na,Ca,Pb)(UO2)O(OH) · 0-1H2OTrig.
7.16.33UranosphaeriteBi(UO2)O2(OH)Mon. 2/m

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 StudtiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Vaes (1947) Bulletin société belge de Géologie, de paleontology et d’hydrologie, Brussels: 70: B 212.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 275.
Walenta, K. (1974): On studtite and its composition. Amer. Mineral., 59, 166–171.
American Mineralogist (1974): 59: 166-171.
Čejka, J., Sejkora, J. and Deliens, M. (1996): New data on studtite, UO4•4H2O, from Shinkolobwe, Shaba, Zaire. Neues Jahrbuch für Mineralogie, Monatshefte (1996): 125-134.
Burns, P.C. and Hughes, K.-A. (2003) Studtite, [(UO2)(O2)(H2O)2]H2O: the first structure of a peroxide mineral. American Mineralogist: 88: 1165-1168.
Burns, P.C. (2005) U 6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.

Internet Links for StudtiteHide

Localities for StudtiteHide

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.
  • Salzburg
    • St Johann im Pongau
Paar, W. & Ruscha, S. (1978): Karinthin 78, 23-29.
A. Strasser: Die Minerale Salzburgs, 1989
  • Minas Gerais
    • Divino das Laranjeiras
      • Linópolis
Tony Nikischer
  • Hunan Province
Aizhen Wang (1992): Acta Mineralogica Sinica 12(1), 78-82
  • Yunnan Province
    • Baoshan Prefecture
      • Tengchong Co.
Anthony, J.W. et al.: Handbook of Mineralogy
    • Dehong Autonomous Prefecture
      • Yingjiang Co.
        • Tongbiguan
Chen Zhangru, Huang Yuzhu, and Gu Xiaofa (1990): A new uranium mineral - Yingjiangite. Acta Mineralogica Sinica 10(2), 102-105.
Czech Republic
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
      • Příbram
        • Háje
Plášil J., Sejkora J., Čejka J., Škácha P., Goliáš V., Pavlíček R., Hofman P. (2008): Supergenní mineralizace z haldy šachty č. 16 Příbram - Háje. - Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 16/1, 43-55. ISSN: 1211-0329
Plášil J., Sejkora J., Čejka J., Škácha P., Goliáš V., Pavlíček R., Hofman P. (2008): Supergenní mineralizace z haldy šachty č. 16 Příbram - Háje. - Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 16/1, 43-55. ISSN: 1211-0329.
    • Karlovy Vary Region
      • Mariánské Lázně (Marienbad)
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
  • Moravia (Mähren; Maehren)
    • Olomouc Region
      • Javorník (Jauernig)
        • Horní Hoštice
Pauliš, P., Novák, F., Ševců, J.: Sekundární minerály z uranového ložiska Jelení vrch u Horních Hoštic v Rychlebských horách. Acta Musei Moraviae, Scientiae geologicae, 2004, roč. 89, s. 121 - 138.
Democratic Republic of the Congo (TL)
  • Katanga (Shaba)
    • Kambove District
      • Shinkolobwe
Am Min 59 (1974), 166; Čejka, J., Sejkora, J. and Deliens, M. (1996): New data on studtite, UO4•4H2O, from Shinkolobwe, Shaba, Zaire. N. Jb. Mineral. Mh. 1996, 125-134.
    • Kolwezi District
      • Kamoto
Deliens, Michel (1992): Occurrence de roubaultite à Kamoto (Shaba, Zaïre). Bulletin de l'Institut Royal des Sciences Naturelles de Belgique. Sciences de la Terre. 58, 295-296.
  • Sud-Kivu
    • Mwenga
Fleischer M, Cabri L J, Chao G Y, Mandarino J A, Pabst A (1982) New mineral names, American Mineralogist 67, 1074-1082
  • Nouvelle-Aquitaine
    • Corrèze
      • Davignac
    • Deux-Sèvres
      • La Chapelle Largeau
Le Règne Minéral, Hors Série IV, 1998 & Le Cahier des micromonteurs, 2002, N°75, pp 8-25
      • Le Temple
Le Cahier des micromonteurs, 2002, N°75, pp 8-25
      • Saint-Amand-sur-Sèvre
Le Cahier des micromonteurs, 2002, N°75, pp 8-25
  • Occitanie
    • Hérault
      • Lodève
[Le Règne Minéral 1997, 13, p.5-18]
  • Baden-Württemberg
    • Black Forest
      • Menzenschwand
No reference listed
      • Schenkenzell
        • Wittichen
Markl, G. & Slotta, C. (2011): Die Uranmineralien des Lagerstättenreviers Wittichen im mittleren Schwarzwald. Lapis 36 (3), 25-37; 54 (in German).
      • Wolfach
        • Oberwolfach
          • Rankach valley
Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German); WALENTA, K. (1995): Neue Mineralfunde von der Grube Clara. 6. Folge, 1. Teil. - Lapis 20 (5), 33-38.
  • Lombardy
    • Bergamo Province
      • Seriana Valley
        • Valgoglio
Borrelli, A., Callegari, A.M., Bolocchi, M., Ciriotti, M.E. (2013): Studtite: primo ritrovamento italiano. Micro, 2/2013, 88-92
  • Buskerud
    • Krødsherad
      • Krøderen Lake
Kristiansen, R. (1990): Nye sekundære uranmineraler fra Bjertnes, Krødsherad. STEIN 17(1), 25-28
  • 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.
  • Kiev Oblast' (Kyiv Oblast'; Kyivshchyna)
    • Ivankiv Raion
      • Pripyat
Burakov, B.E., Strykanova, E.E., Anderson, E.B. (): Secondary Uranium Minerals on the Surface of Chernobyl “Lava”. MRS Proceedings: 465; :
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