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Studtite

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Formula:
[(UO
 
2
)(O
 
2
)(H
 
2
O)
 
2
] · H
 
2
O
System:MonoclinicColour: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

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:4/H.01-20
Nickel-Strunz 10th (pending) edition ID:4.GA.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
A : Without additional cations
Dana 8th edition ID:5.3.1.1

5 : OXIDES CONTAINING URANIUM OR THORIUM
3 : AXO4·xH2O
Hey's CIM Ref.:7.16.6

7 : Oxides and Hydroxides
16 : Oxides of U
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Type Occurrence of Studtite

Type Locality:Shinkolobwe Mine (Kasolo Mine), Shinkolobwe, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)
Year of Discovery:1947

Physical Properties of Studtite

Lustre:Waxy
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:
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
Maximum Birefringence:δ = 0.135

Chart 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:
[(UO
 
2
)(O
 
2
)(H
 
2
O)
 
2
] · H
 
2
O
Simplified for copy/paste:[(UO2)(O2)(H2O)2]·H2O
Idealised Formula:
UO
 
4
· 4H
 
2
O
Essential elements:H, O, U
All elements listed in formula:H, O, U

Relationship of Studtite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.GA.05Metaschoepite
UO
 
3
· 1-2H
 
2
O
4.GA.05Paraschoepite
UO
 
3
· 2H
 
2
O
4.GA.05Schoepite
(UO
 
2
)
 
8
O
 
2
(OH)
 
12
· 12H
 
2
O
4.GA.05Paulscherrerite
UO
 
2
(OH)
 
2
4.GA.10Ianthinite
U
4+
 
(UO
 
2
)
 
5
O
 
7
· 10H
 
2
O
4.GA.15Metastudtite
UO
 
4
· 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
7.16.1Uraninite
UO
 
2
7.16.2Schoepite
(UO
 
2
)
 
8
O
 
2
(OH)
 
12
· 12H
 
2
O
7.16.3Paraschoepite
UO
 
3
· 2H
 
2
O
7.16.4Metaschoepite
UO
 
3
· 1-2H
 
2
O
7.16.5Metastudtite
UO
 
4
· 2H
 
2
O
7.16.7Ianthinite
U
4+
 
(UO
 
2
)
 
5
O
 
7
· 10H
 
2
O
7.16.8Compreignacite
K
 
2
(UO
 
2
)
 
6
O
 
4
(OH)
 
6
· 7H
 
2
O
7.16.9Vandenbrandeite
Cu(UO
 
2
)(OH)
 
4
7.16.10Roubaultite
Cu
 
2
(UO
 
2
)
 
3
(OH)
 
10
· 5H
 
2
O
7.16.11Becquerelite
Ca(UO
 
2
)
 
6
O
 
4
(OH)
 
6
· 8H
 
2
O
7.16.12Rameauite
K
 
2
Ca(UO
 
2
)
 
6
(OH)
 
16
· H
 
2
O
7.16.13Agrinierite
K
 
2
(Ca,Sr)(UO
 
2
)
 
3
O
 
3
(OH)
 
2
· 5H
 
2
O
7.16.14Protasite
Ba(UO
 
2
)
 
3
O
 
3
(OH)
 
2
· 3H
 
2
O
7.16.15Billietite
Ba(UO
 
2
)
 
6
O
 
4
(OH)
 
6
· 4-8H
 
2
O
7.16.16Bauranoite
Ba(UO
 
2
)
 
2
(OH)
 
6
· 1-2H
 
2
O
7.16.17Metacalciouranoite
(Ca,Ba,Pb,K
 
2
)U
 
2
O
 
7
· 2H
 
2
O
7.16.18Calciouranoite
(Ca,Ba,Pb)U
 
2
O
 
7
· 5H
 
2
O
7.16.19Orthobrannerite
U
4+
 
U
6+
 
Ti
 
4
O
 
12
(OH)
 
2
7.16.20Thorutite
(Th,U,Ca)Ti
 
2
(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
(U
4+
 
,REE,Th,Ca)(Ti,Fe
3+
 
,Nb)
 
2
(O,OH)
 
6
7.16.24Fourmarierite
Pb(UO
 
2
)
 
4
O
 
3
(OH)
 
4
· 4H
 
2
O
7.16.25Richetite
Pb(UO
 
2
)
 
4
O
 
5
· 4H
 
2
O
7.16.26Curite
Pb
 
3
(UO
 
2
)
 
8
O
 
8
(OH)
 
6
· 3H
 
2
O
7.16.27Masuyite
Pb(UO
 
2
)
 
3
O
 
3
(OH)
 
2
· 3H
 
2
O
7.16.28Vandendriesscheite
PbU
 
7
O
 
22
· 12H
 
2
O
7.16.29Metavandendriesscheite
PbU
 
7
O
 
22
· nH
 
2
O n < 12
7.16.30Sayrite
Pb
 
2
(UO
 
2
)
 
5
O
 
6
(OH)
 
2
· 4H
 
2
O
7.16.31Wölsendorfite
(Pb,Ca)U
 
2
O
 
7
· 2H
 
2
O
7.16.32Clarkeite
(Na,Ca,Pb)(UO
 
2
)O(OH) · 0-1H
 
2
O
7.16.33Uranosphaerite
Bi(UO
 
2
)O
 
2
(OH)

Other Names for Studtite

Other Languages:
German:Studtit
Russian:Студтит
Spanish:Studtita

Other Information

Health Warning: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

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Studtite details from Handbook of Mineralogy (PDF)
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  • Localities for Studtite

    The 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. ? 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
        • 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
      • Lusungu River District
    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, 11, 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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