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Studtite

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Formula:
[(UO2)(O2)(H2O)2] · H2O
System:
Monoclinic
Colour:
Very pale yellow to ...
Name:
Named after Franz Edward Studt (or Stüdt), (apparently) German geologist, who partly lived in England. For discussion and further information, see http://www.mindat.org/mesg-7-192418.html.
A rare secondary uranium mineral containing a peroxide group in its crystal structure.
May dehydrate to metastudtite.

Classification of Studtite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
4.GA.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
A : Without additional cations
5.3.1.1

5 : OXIDES CONTAINING URANIUM OR THORIUM
3 : AXO4·xH2O
7.16.6

7 : Oxides and Hydroxides
16 : Oxides of U
mindat.org URL:
http://www.mindat.org/min-3815.html
Please feel free to link to this page.

First Recorded Occurrence of Studtite

Year of Discovery:
1947

Physical Properties of Studtite

Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Very pale yellow to yellow

Crystallography of Studtite

Crystal System:
Monoclinic
Cell Parameters:
a = 11.85Å, b = 6.78Å, c = 4.24Å
β = 93.62°
Ratio:
a:b:c = 1.748 : 1 : 0.625
Unit Cell Volume:
V 339.97 ų (Calculated from Unit Cell)
Morphology:
Crusts and radial aggregates of flexible, fibrous crystals.
X-Ray Powder Diffraction Data:
d-spacingIntensity
5.93 (10)
4.27 (4)
3.40 (8)
2.96 (6)
2.23 (6)
2.02 (5)
1.970 (5b)

Optical Data of Studtite

Type:
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:
Low
Dispersion:
none

Chemical Properties of Studtite

Formula:
[(UO2)(O2)(H2O)2] · H2O
Idealised Formula:
UO4 · 4H2O
Essential elements:
All elements listed in formula:

Relationship of Studtite to other Species

4.GA.05MetaschoepiteUO3 · 1-2H2O
4.GA.05ParaschoepiteUO3 · 2H2O
4.GA.05Schoepite(UO2)8O2(OH)12 · 12H2O
4.GA.05PaulscherreriteUO2(OH)2
4.GA.10IanthiniteU4+(UO2)5O7 · 10H2O
4.GA.15MetastudtiteUO4 · 2H2O
7.16.1UraniniteUO2
7.16.2Schoepite(UO2)8O2(OH)12 · 12H2O
7.16.3ParaschoepiteUO3 · 2H2O
7.16.4MetaschoepiteUO3 · 1-2H2O
7.16.5MetastudtiteUO4 · 2H2O
7.16.7IanthiniteU4+(UO2)5O7 · 10H2O
7.16.8CompreignaciteK2(UO2)6O4(OH)6 · 7H2O
7.16.9VandenbrandeiteCu(UO2)(OH)4
7.16.10RoubaultiteCu2(UO2)3(OH)10 · 5H2O
7.16.11BecquereliteCa(UO2)6O4(OH)6 · 8H2O
7.16.12RameauiteK2Ca(UO2)6(OH)16 · H2O
7.16.13AgrinieriteK2(Ca,Sr)(UO2)3O3(OH)2·5H2O
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
7.16.19OrthobranneriteU4+U6+Ti4O12(OH)2
7.16.20Thorutite(Th,U,Ca)Ti2(O,OH)6
7.16.21Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
7.16.22Davidite-(Ce)(Ce,La)(Y,U,Fe)(Ti,Fe)20(O,OH)38
7.16.23Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
7.16.24FourmarieritePb(UO2)4O3(OH)4 · 4H2O
7.16.25RichetitePb(UO2)4O5 · 4H2O
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
7.16.31Wölsendorfite(Pb,Ca)U2O7 · 2H2O
7.16.32Clarkeite(Na,Ca,Pb)(UO2)O(OH) · 0-1H2O
7.16.33UranosphaeriteBi(UO2)O2(OH)

Other Names for Studtite

Name in Other Languages:
German:Studtit
Spanish:Studtita

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 Studtite

Reference List:
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 Studtite

Localities for Studtite

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.
Austria
 
  • Salzburg
    • St Johann im Pongau
Paar, W. & Ruscha, S. (1978): Karinthin 78, 23-29.
A. Strasser: Die Minerale Salzburgs, 1989
Brazil
 
  • Minas Gerais
    • Doce valley
      • Divino das Laranjeiras
        • Linópolis
Tony Nikischer
China
 
  • 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)
    • 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 Hostice
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 Congo (Zaïre)
 
  • Katanga (Shaba)
    • Katanga Copper Crescent
      • 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.
      • 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.
      • Swambo
  • 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
France
 
  • Languedoc-Roussillon
    • Hérault
      • Lodève
[Le Règne Minéral 1997, 13, p.5-18]
  • Limousin
    • Corrèze
      • Davignac
  • Poitou-Charentes
    • 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
Germany
 
  • 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.
Italy
 
  • 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
Norway
 
  • Buskerud
    • Krødsherad
      • Krøderen Lake
Kristiansen, R. (1990): Nye sekundære uranmineraler fra Bjertnes, Krødsherad. STEIN 17(1), 25-28
Switzerland
 
  • 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.
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