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Leo Szilard
Crystal System:
Leo Szilard (February 11, 1898 – May 30, 1964) was a Hungarian-born physicist.
New structure type. Unique combination of elements.

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Classification of LeószilárditeHide

Renamed by the IMA
Approval History:
Approved by IMA in 2015 with the name leoszilardite (IMA 2015-128). Renamed as leószilárdite by IMA in 2016.

Chemical Properties of LeószilárditeHide

IMA Formula:
Na6Mg(UO2)2(CO3)6 · 6H2O

Crystallography of LeószilárditeHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 11.609(2) Å, b = 6.784(1) Å, c = 15.106(3) Å
β = 91.378(3)°
a:b:c = 1.711 : 1 : 2.227
Unit Cell V:
1,189.34 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:

Type Occurrence of LeószilárditeHide

Place of Conservation of Type Material:
Mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA (catalogue number 65645)

Synonyms of LeószilárditeHide

Other Language Names for LeószilárditeHide

Other InformationHide

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 LeószilárditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Olds, T.A., Sadergaski, L., Plášil, J., Kampf, A.R., Burns, P.C., Steele, I.M., Marty, J. (2016): Leoszilardite, IMA 2015-128. CNMNC Newsletter No. 31, June 2016, page 694; Mineralogical Magazine: 80: 691–697
Olds, T.A., Sardegaski, L.R., Plášil, J., Kampf, A.R., Burns, P.C., Steele, I.M., Marty, J., Carlson, S.M., and Mills, O.P. (2017) Leószilárdite, the first Na,Mg-containing uranyl carbonate from the Markey Mine, San Juan County, Utah, USA. Mineralogical Magazine, 81, 743-754.

Internet Links for LeószilárditeHide

Localities for LeószilárditeHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Utah
    • San Juan Co.
      • White Canyon District
        • Red Canyon
Olds, T.A., Sadergaski, L., Plášil, J., Kampf, A.R., Burns, P.C., Steele, I.M., Marty, J. (2016): Leoszilardite, IMA 2015-128. CNMNC Newsletter No. 31, June 2016, page 694; Mineralogical Magazine: 80: 691–697;
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