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Ewingite

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Formula:
Mg8Ca8(UO2)24(CO3)30O4(OH)12 · 138H2O
System:
Tetragonal
New structure type. Chemically resembles rabbittite, swartzite, and albrechtschraufite.


Classification of Ewingite

Approved, Pending publication

Chemical Properties of Ewingite

IMA Formula:
Mg8Ca8(UO2)24(CO3)30O4(OH)12 · 138H2O
Elements listed in formula:

Crystallography of Ewingite

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I41/acd
Space Group Setting:
I41/acd
Cell Parameters:
a = 35.401(9) Å, c = 48.157(13) Å
Ratio:
a:c = 1 : 1.36
Unit Cell Volume:
V 60,351.84 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction Data:
d-spacingIntensity
17.8(19)
14.3(31)
10.1(74)
8.28(100)
6.61(24)
6.03(30)
5.69(36)
3.772(17)
Comments:
From Type Description.

Type Occurrence of Ewingite

Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 65686

Other Names for Ewingite

Name in Other Languages:

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 Ewingite

Reference List:
Olds, T.A., Plášil, J., Kampf, A.R., Burns, P.C., Simonetti, A. and Sadergaski, L.R. (2016) Ewingite, IMA 2016-012. CNMNC Newsletter No. 31, June 2016, page 697; Mineralogical Magazine, 80, 691–697.

Internet Links for Ewingite

mindat.org URL:
https://www.mindat.org/min-47791.html
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Localities for Ewingite

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.
(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.
Czech Republic (TL)
 
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
Olds, T.A., Plášil, J., Kampf, A.R., Burns, P.C., Simonetti, A. and Sadergaski, L.R. (2016) Ewingite, IMA 2016-012. CNMNC Newsletter No. 31, June 2016, page 697; Mineralogical Magazine, 80, 691–697.
Mineral and/or Locality  
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