Metaschoepite
A valid IMA mineral species - grandfathered
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About Metaschoepite
Formula:
(UO2)8O2(OH)12 · 10H2O
Studies on synthetic metaschoepite (Weller et al. 2000, Kubatko et al. 2006) confirmed presence of 10H2O.
Crystal System:
Orthorhombic
Member of:
Name:
Named by Charles L. Christ and Joan R. Clark in 1960 for the dehydrated relationship of the mineral to schoepite.
Unique Identifiers
Mindat ID:
2684
Long-form identifier:
mindat:1:1:2684:6
IMA Classification of Metaschoepite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
(U6+O2)8O2(OH)12·10H2O
Classification of Metaschoepite
4.GA.05
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
A : Without additional cations
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
A : Without additional cations
5.2.1.1
5 : OXIDES CONTAINING URANIUM OR THORIUM
2 : AXO3·xH2O
5 : OXIDES CONTAINING URANIUM OR THORIUM
2 : AXO3·xH2O
7.16.4
7 : Oxides and Hydroxides
16 : Oxides of U
7 : Oxides and Hydroxides
16 : Oxides of U
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Mshp | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Chemistry of Metaschoepite
Mindat Formula:
(UO2)8O2(OH)12 · 10H2O
Studies on synthetic metaschoepite (Weller et al. 2000, Kubatko et al. 2006) confirmed presence of 10H2O.
Studies on synthetic metaschoepite (Weller et al. 2000, Kubatko et al. 2006) confirmed presence of 10H2O.
Elements listed:
Crystallography of Metaschoepite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pbcn
Cell Parameters:
a = 13.98 Å, b = 16.7 Å, c = 14.67 Å
Ratio:
a:b:c = 0.837 : 1 : 0.878
Unit Cell V:
3,424.95 ų (Calculated from Unit Cell)
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0004319 | Metaschoepite | Klingensmith A L, Deely K M, Kinman W S, Kelly V, Burns P C (2007) Neptunium incorporation in sodium-substituted metaschoepite American Mineralogist 92 662-669 | ![]() | 2007 | synthetic | 0 | 293 |
| 0004318 | Metaschoepite | Klingensmith A L, Deely K M, Kinman W S, Kelly V, Burns P C (2007) Neptunium incorporation in sodium-substituted metaschoepite American Mineralogist 92 662-669 | ![]() | 2007 | synthetic | 0 | 293 |
| 0004317 | Metaschoepite | Klingensmith A L, Deely K M, Kinman W S, Kelly V, Burns P C (2007) Neptunium incorporation in sodium-substituted metaschoepite American Mineralogist 92 662-669 | ![]() | 2007 | synthetic | 0 | 293 |
| 0004316 | Metaschoepite | Klingensmith A L, Deely K M, Kinman W S, Kelly V, Burns P C (2007) Neptunium incorporation in sodium-substituted metaschoepite American Mineralogist 92 662-669 | ![]() | 2007 | synthetic | 0 | 293 |
| 0004315 | Metaschoepite | Klingensmith A L, Deely K M, Kinman W S, Kelly V, Burns P C (2007) Neptunium incorporation in sodium-substituted metaschoepite American Mineralogist 92 662-669 | ![]() | 2007 | Katanga, Congo | 0 | 293 |
| 0009921 | Metaschoepite | Weller M T, Light M E, Gelbrich T (2000) Structure of uranium (VI) oxide dihydrate UO3*2H2O; synthetic meta-schoepite (UO2)4O(OH)6*5H2O Acta Crystallographica B56 577-583 | ![]() | 2000 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.09 Å | (100) |
| 3.45 Å | (25) |
| 3.39 Å | (17) |
| 2.890 Å | (7) |
| 2.48 Å | (7 broad) |
| 2.542 Å | (6) |
| 2.023 Å | (5) |
Comments:
Shinkolobwe Mine, Haut-Katanga, DR Congo. The data are from Christ and Clark (1960).
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Metaschoepite
Other Language Names for Metaschoepite
Relationship of Metaschoepite to other Species
Member of:
Other Members of Schoepite Group:
| Paulscherrerite | UO2(OH)2 | Mon. |
| Schoepite | (UO2)8O2(OH)12 · 12H2O | Orth. mmm(2/m2/m2/m) : Pbca |
Common Associates
Associations Based on Photo Data:
| 9 photos of Metaschoepite associated with Umohoite | (UO2)MoO4 · 2H2O |
| 8 photos of Metaschoepite associated with Parauranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| 4 photos of Metaschoepite associated with Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| 4 photos of Metaschoepite associated with Hydronováčekite | Mg(UO2)2(AsO4)2 · 12H2O |
| 3 photos of Metaschoepite associated with Becquerelite | Ca(UO2)6O4(OH)6 · 8H2O |
| 2 photos of Metaschoepite associated with Fourmarierite | Pb(UO2)4O3(OH)4 · 4H2O |
| 2 photos of Metaschoepite associated with Baryte | BaSO4 |
| 1 photo of Metaschoepite associated with Gypsum | CaSO4 · 2H2O |
| 1 photo of Metaschoepite associated with Vandendriesscheite | PbU7O22 · 12H2O |
| 1 photo of Metaschoepite associated with Uraninite | UO2 |
Related Minerals - Strunz-mindat Grouping
| 4.GA.05 | Paraschoepite | UO3 · 2H2O |
| 4.GA.05 | Schoepite | (UO2)8O2(OH)12 · 12H2O |
| 4.GA.10 | Ianthinite | U4+(UO2)5O7 · 10H2O |
| 4.GA.15 | Metastudtite | UO4 · 2H2O |
| 4.GA.15 | Studtite | [(UO2)(O2)(H2O)2] · H2O |
| 4.GA.20 | Paulscherrerite | UO2(OH)2 |
Radioactivity
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.
Internet Links for Metaschoepite
mindat.org URL:
https://www.mindat.org/min-2684.html
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References for Metaschoepite
Reference List:
Christ, C. L., Clark, J. R. (1960) Crystal chemical studies of some uranyl oxide hydrates. American Mineralogist, 45 (9-10) 1026-1061
Christ, C. L. (1965) Phase transformations and crystal chemistry of schoepite. American Mineralogist, 50 (1-2) 235-239
Finch, Robert J., Hawthorne, Frank 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 (4) 230-238 doi:10.1017/s0885715600009799
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. Environmental Science & Technology, 33 (20). 3552-3557 doi:10.1021/es9901516
Weller, Mark. T., Light, Mark E., Gelbrich, Thomas (2000) Structure of uranium(VI) oxide dihydrate, UO3·2H2O; synthetic meta-schoepite (UO2)4O(OH)6·5H2O. Acta Crystallographica Section B Structural Science, 56 (4). 577-583 doi:10.1107/s0108768199016559
Burns, Peter C. (2005) U6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. The Canadian Mineralogist, 43 (6) 1839-1894 doi:10.2113/gscanmin.43.6.1839
Kubatko, K.-A., Helean, K., Navrotsky, A., Burns, P. C. (2006) Thermodynamics of uranyl minerals: Enthalpies of formation of uranyl oxide hydrates. American Mineralogist, 91 (4) 658-666 doi:10.2138/am.2006.1856
Localities for Metaschoepite
Showing 28 localities.
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Australia | |
| Brugger et al. (2003) +1 other reference |
| Bottrill (2021) |
Canada | |
| Reiner Mielke and Travis Olds |
Czech Republic | |
| Pauliš P. et al. (Kutna Hora, issue 1) |
| Hloušek et al. (2002) |
| Möhn et al. (12/2021) | |
| Analyzed by and in the collection of ... | |
DR Congo (TL) | |
| Am Min 50 (1965) |
France | |
| collection BONNET Frederic |
Germany | |
| Kolitsch (1997) |
| SEM-EDS and XRD by Joy Desor and ... |
| Witzke (1996) |
Italy | |
| In the collection of Brent Thorne. ... |
Japan | |
| Akira Kato (1973) |
| Akira Kato (1973) |
Mexico | |
| www.swri.org (2001) |
Namibia | |
| Bowell et al. (2017) |
Pakistan | |
| Alia et al. (2018) |
Poland | |
| Syczewski et al. (2023) |
Switzerland | |
| Meisser (2012) |
USA | |
| ID confirmed at Carnegie Museum of ... +1 other reference |
| Kampf et al. (2019) |
| King et al. (1994) |
| Dana 8:258 |
| Caldwell (2018) |
| Foord et al. (1997) |
| Carnegie Museum of Natural History ... |
| Min News 16:1 p1 |
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Mesa County, Colorado, USA