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Metaschoepite

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Formula:
UO
 
3
· 1-2H
 
2
O
System:Orthorhombic
Member of:Schoepite Group
Name:Named by Charles L. Christ and Joan R. Clark in 1960 for the dehydrated relationship of the mineral to schoepite.


May occur as a dehydration product of schoepite, and may itself dehydrate to paulscherrerite.

Classification of Metaschoepite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:4/H.01-50
Nickel-Strunz 10th (pending) edition ID:4.GA.05

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:5.2.1.1

5 : OXIDES CONTAINING URANIUM OR THORIUM
2 : AXO3·xH2O
Hey's CIM Ref.:7.16.4

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

Type Locality:Shinkolobwe Mine (Kasolo Mine), Shinkolobwe, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)
Year of Discovery:1960

Crystallography of Metaschoepite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pbcn {P21/b 2/c 21/n}
Cell Parameters:a = 13.98Å, b = 16.7Å, c = 14.67Å
Ratio:a:b:c = 0.837 : 1 : 0.878
Unit Cell Volume:V 3,424.95 ų (Calculated from Unit Cell)

Chemical Properties of Metaschoepite

Formula:
UO
 
3
· 1-2H
 
2
O
Simplified for copy/paste:UO3·1-2H2O
Essential elements:H, O, U
All elements listed in formula:H, O, U

Relationship of Metaschoepite to other Species

Member of:Schoepite Group
Other Members of Group:

- +
Paulscherrerite
UO
 
2
(OH)
 
2
Schoepite
(UO
 
2
)
 
8
O
 
2
(OH)
 
12
· 12H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
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
4.GA.15Studtite
[(UO
 
2
)(O
 
2
)(H
 
2
O)
 
2
] · H
 
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
7.16.5Metastudtite
UO
 
4
· 2H
 
2
O
7.16.6Studtite
[(UO
 
2
)(O
 
2
)(H
 
2
O)
 
2
] · H
 
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 Metaschoepite

Other Languages:
German:Metaschoepit
Spanish:Metaschoepita

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 Metaschoepite

Reference List:

- +
CHRIST, C. L. & CLARK, J. R. (1960): Crystal chemical studies of some uranyl oxide hydrates. Am. Mineral. 45, 1026-1061.

CHRIST, C. L. (1965): Phase transformation and crystal chemistry of schoepite. Am. Mineral. 50, 235-239.

Finch, R. J., Hawthorne, F. C., Miller, M. L. & Ewing, R. C. (1997): Distinguishing among schoepite, [(UO2)8O2(OH)12](H2O)12, and related minerals by X-ray powder diffraction. Powder Diffraction 12, 230-238.

Finch, R.J. and F.C. Hawthorne (1998), Structural relations among schoepite, metaschoepite and "dehydrated schoepite." Canadian Mineralogist: 36: 831-845.

Sowder, A. G.; Clark, S. B.; Fjeld, R. A. (1999): The transformation of uranyl oxide hydrates: The effect of dehydration on synthetic metaschoepite and its alteration to becquerelite. Environ. Sci. Technol. 33, 3552-3557.

Weller, M.T., Light, M.E., and Gelbrich, T. (2000) Structure of uranium(VI) oxide hydrate, UO3·2H2O; synthetic meta-schoepite (UO2)4O(OH)6·5H2O. Acta Crystallographica: B56: 577-583.

Burns, P.C. (2005) U 6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.

Kubatko, Karrie-Ann, Katheryn Helean, Alexandra Navrotsky, and Peter C. Burns (2006), Thermodynamics of uranyl minerals: Enthalpies of formation of uranyl oxide hydrates: American Mineralogist: 91: 658-666.

Klingensmith, Amanda L.; Deely, Kathryn M.; Kinman, William S.; Kelly, Virginia; Burns, Peter C. (2007): Neptunium incorporation in sodium-substituted metaschoepite. American Mineralogist 92, 662-669.

Internet Links for Metaschoepite

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

    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.
    Australia
     
    • South Australia
      • Flinders Ranges
        • North Flinders Ranges
          • Arkaroola Region (Arkaroola Station)
            • Mt Painter area
    2003, Brugger, J., Ansermet, S. & Pring, A. ' Uranium minerals from Mt Painter, Northern Flinders ranges, South Australia' Australian Journal of Mineralogy, vol. 9, n°1, pp 15-31
    Canada
     
    • Ontario
      • Haliburton Co.
        • Cardiff Township
    Reiner Mielke and Travis Olds
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Central Bohemia Region
    Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
      • Karlovy Vary Region
        • Krušné Hory Mtns (Erzgebirge)
          • Jáchymov District (St Joachimsthal)
            • Jáchymov (St Joachimsthal)
    Lapis 2002(7/8), 59
    Democratic Republic of Congo (Zaïre)
     
    • Katanga (Shaba)
      • Katanga Copper Crescent
        • Shinkolobwe
    Am Min 50 (1965), 235
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Wolfach
          • Oberwolfach
            • Rankach valley
    KOLITSCH, U. (1997): Ianthinit und weitere Neufunde aus der Grube Clara im mittleren Schwarzwald. - Erzgräber 11 (2), 76-88.
    • Saxony
      • Erzgebirge
        • Schwarzenberg District
          • Pöhla
    Witzke, T.: Lapis 1996(6), 40-41
    Japan
     
    • Honshu Island
      • Chugoku Region
        • Okayama Prefecture
    Akira Kato (1973) Sakurai Koubutsu Hyohon, 34.
        • Shimane Prefecture
    Akira Kato (1973) Sakurai Koubutsu Hyohon, 34.
    Mexico
     
    • Chihuahua
      • Mun. de Aldama
        • Peña Blanca District
          • Sierra Peña Blanca
    http://www.swri.org/4org/d20/ghs/PBlanca/mineral.html
    Switzerland
     
    • Wallis (Valais)
      • Le Trient Valley
    Meisser, N. (2012): La minéralogie de l'uranium dans le massif des Aiguilles Rouges. Matér. Géol. Suisse, Sér. géotech. 96, 183 p.
    USA
     
    • Maine
      • Androscoggin Co.
        • Poland
    King, V. T. and Foord, E. E., 1994, Mineralogy of Maine, Descriptive Mineralogy, volume 1, Maine Geological Survey, Augusta, Maine, USA, pp. 418 + 88 plates.
    • New Hampshire
      • Sullivan Co.
        • Acworth
    Dana 8:258
    • North Carolina
    Foord,Eugene E.,Korzeb,Stanley L.,Litchte,Frederick E and Fitzpatrick,John J. (1997) Additional studies On Mixed Uranyl Oxide-Hydroxide Hydrate Alteration Products Of Uraninite From The Palermo And Ruggles Granitic Pegmatites,Grafton County,New Hampshire, The Canadian Mineralogist Vol.35 pp.145-151 (1997) pg.146,147,151.
    • Utah
      • San Juan Co.
        • White Canyon District
          • White Canyon
    Min News 16:1 p1
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