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Leószilárdite, the first Na,Mg-containing uranyl carbonate from the Markey Mine, San Juan County, Utah, USA

Published online by Cambridge University Press:  02 January 2018

Travis A. Olds ,
Luke R. Sadergaski ,
Jakub Plášil ,
Anthony R. Kampf ,
Peter C. Burns ,
Ian M. Steele ,
Joe Marty ,
Shawn M. Carlson  and
Owen P. Mills
Travis A. Olds*
Affiliation:
Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
Luke R. Sadergaski
Affiliation:
Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, IN 46556, USA
Jakub Plášil
Affiliation:
Institute of Physics, Academy of Sciences of the Czech Republic, v.v.i., Na Slovance 1999/2, 18221 Praha 8, Czech Republic
Anthony R. Kampf
Affiliation:
Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA
Peter C. Burns
Affiliation:
Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, IN 46556, USA Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
Ian M. Steele
Affiliation:
Notre Dame Integrated Imaging Facility, University of Notre Dame, Notre Dame, IN 46556, USA
Joe Marty
Affiliation:
5199 East Silver Oak Road, Salt Lake City, UT 84108, USA
Shawn M. Carlson
Affiliation:
245 Jule Lake Road, Crystal Falls, MI 49920, USA
Owen P. Mills
Affiliation:
Applied Chemical and Morphological Analysis Laboratory, Michigan Technological University, Houghton, MI 49931, USA
*
*E-mail: [email protected]
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Abstract

Leószilárdite (IMA2015-128), Na6Mg(UO2)2(CO3)6·6H2O, was found in the Markey Mine, Red Canyon, White Canyon District, San Juan County, Utah, USA, in areas with abundant andersonite, natrozippeite, gypsum, anhydrite, and probable hydromagnesite along with other secondary uranium minerals bayleyite, čejkaite and johannite. The new mineral occurs as aggregates of pale yellow bladed crystals flattened on ﹛001﹜ and elongated along [010], individually reaching up to 0.2 mmlong. More commonly it occurs as pale yellow pearlescent masses to 2 mm consisting of very small plates. Leószilárdite fluoresces green under both longwave and shortwave ultraviolet light, and is translucent with a white streak, hardness of 2 (Mohs), and brittle tenacity with uneven fracture. The new mineral is readily soluble in room temperature H2O. Crystals have perfect cleavage along ﹛001﹜, and exhibit the forms ﹛110﹜,﹛001﹜,﹛100﹜,﹛101﹜ and ﹛101﹜. Optically, leószilárdite is biaxial (-), α= 1.504(1), β= 1.597(1), γ= 1.628(1) (white light); 2V (meas.) = 57(1)°, 2V (calc.) = 57.1°; dispersion r > v, slight. Pleochroism: X= colourless, Y and Z= light yellow; X<Y ≈ Z The average of six wavelength dispersive spectroscopic analyses provided Na2O 14.54, MgO 3.05, UO3 47.95, CO2 22.13, H2O 9.51, total 97.18 wt.%. The empirical formula is Na5.60Mg0.90U2O28C6H12.60, based on 28 O apfu. Leószilárdite is monoclinic, C2/m, a = 11.6093(21), b = 6.7843(13), c = 15.1058(28) Å, β = 91.378(3)°, V= 1189.4(4) Å3 and Z = 2. The crystal structure (R1 = 0.0387 for 1394 reflections with Iobs > 4σI), consists of uranyl tricarbonate anion clusters [(UO2)(CO3)3]4- held together in part by irregular chains of NaO5(H2O) polyhedra sub parallel to [010]. Individual uranyl tricarbonate clusters are also linked together by three-octahedron units consisting of two Na-centred octahedra that share the opposite faces of a Mg-centred octahedron at the centre (Na–Mg–Na), and have the composition Na2MgO12(H2O)4. The name of the new mineral honours the Hungarian-American physicist, inventor and biologist Dr. Leó Szilárd (1898–1964).

Keywords

leószilárditenew mineraluraniumuranyl carbonatecrystal structureMarkey mine
Type
Research Article
Information
Mineralogical Magazine , Volume 81 , Issue 5 , October 2017 , pp. 1039 - 1050
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2017

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References

Bartlett, J.R. and Cooney, R.P. (1989) On the determination of uranium-oxygen bond lengths in dioxouranium( VI) compounds by Raman spectroscopy. Journal of Molecular Structure, 193, 295–300.CrossRefGoogle Scholar
Brown, I.D. and Altermatt, D. (1985) Bond-valence parameters obtained from a systematic analysis of the inorganic crystal structure database. Acta Crystallographica, B41, 244–248.CrossRefGoogle Scholar
Burns, P.C. (2005) U6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. The Canadian Mineralogist, 43, 1839–1894.CrossRefGoogle Scholar
Burns, P.C. and Finch, R.J. (1999) Wyartite: Crystallographic evidence for the first pentavalenturanium mineral. American Mineralogist, 84, 1456–1460.CrossRefGoogle Scholar
Burns, P.C., Ewing, R.C. and Hawthorne, F.C. (1997) The crystal chemistry of hexavalent uranium: polyhedron geometries, bond-valence parameters, and polymerization of polyhedra. The Canadian Mineralogist, 35, 1551–1570.Google Scholar
Čejka, J. (1999) Infrared spectroscopy and thermal analysis of the uranyl minerals. Pp. 521–622 in: Uranium: Mineralogy, Geochemistry and the Environment (Burns, P.C. and Ewing, R.C., editors). Reviews in Mineralogy, 38. Mineralogical Society of America, Washington DC.CrossRefGoogle Scholar
Chenoweth, W.L. (1993) The Geology and Production History of the Uranium Deposits in the White Canyon Mining District, San Juan County, Utah. Utah Geological Survey Miscellaneous Publication, 93–3, 26 pp.Google Scholar
Císařová, I., Skála, R., Ondruš, P. and Drábek, M. (2001) Trigonal Na4[UO2(CO3)3]. Acta Crystallographica, E57, 132–134.Google Scholar
Clark, D.L., Hobart, D.E. and Neu, M.P. (1995) Actinide carbonate complexes and their importance in actinide environmental chemistry. Chemical Reviews, 95, 25–48.CrossRefGoogle Scholar
Finch, R.J. and Ewing, R.C. (1992) The corrosion of uraninite under oxidizing conditions. Journal of Nuclear Materials, 190, 133–156.CrossRefGoogle Scholar
Finch, R.J. and Murakami, T. (1999) Systematics and paragenesis of uranium minerals. Pp. 91–179 in: Uranium: Mineralogy, Geochemistry and the Environment (Burns, P.C. and Ewing, R.C., editors). Reviews in Mineralogy, 38. Mineralogical Society of America, Washington DC.CrossRefGoogle Scholar
Garrels, R.M. and Christ, C.L. (1959) Behavior of uranium minerals during oxidation. Pp. 81–89 in: Geochemistry and Mineralogy of the Colorado Plateau Uranium Ores (Garrels, R.M., R.M., and Larsen, E.S., editors). United States Geological Survey Professional Paper, 320.Google Scholar
Ginderow, D. and Cesbron, F. (1985) Structure de la roubaultite, Cu2(UO2)3(CO3)2O2(OH)2(H2O)4 . Acta Crystallographica, C41, 645–657.Google Scholar
Gorman-Lewis, D., Burns, P.C. and Fein, J.B. (2008) Review of uranyl mineral solubility measurements. Journal of Chemical Thermodynamics, 40, 335–352.CrossRefGoogle Scholar
Hazen, R.M., Hummer, D.R., Hystad, G., Downs, R.T. and Golden, J.J. (2016) Carbon mineral ecology: Predicting the undiscovered minerals of carbon. American Mineralogist, 101, 889–908.CrossRefGoogle Scholar
Hostetler, P.B. and Garrels, R.M. (1962) Transportation and precipitation of uranium and vanadium at low temperatures, with special reference to sandstone-type uranium deposits. Economic Geology, 57, 137–167.CrossRefGoogle Scholar
Hughes, K.A. and Burns, P.C. (2003) A new uranyl carbonate sheet in the crystal structure of fontanite, Ca [(UO2)3(CO3)2O2](H2O)6 . American Mineralogist, 88, 962–966.CrossRefGoogle Scholar
Jolivet, J.P., Thomas, Y. and Taravel, B. (1980) Vibrational study of coordinated CO3 2- ions. Journal of Molecular Structure, 60, 93–98.CrossRefGoogle Scholar
Langmuir, D. (1978) Uranium solution-mineral equilibria at low temperatures with applications to sedimentary ore deposits. Geochimica Cosmochima Acta, 42, 547–569.CrossRefGoogle Scholar
Li, Y. and Burns, P.C. (2001) A new rare-earth-element uranyl carbonate sheet in the structure of bijvoetite. The Canadian Mineralogist, 37, 153–162.Google Scholar
Li, Y., Krivovichev, S.V. and Burns, P.C. (2001) The crystal structure of Na4(UO2)(CO3)3 and its relationship to schröckingerite. Mineralogical Magazine, 65, 297–304.CrossRefGoogle Scholar
Mandarino, J.A. (1976) The Gladstone-Dale relationship – Part 1: derivation of new constants. The Canadian Mineralogist, 14, 498–502.Google Scholar
Mandarino, J.A. (2007) The Gladstone–Dale compatibility of minerals and its use in selecting mineral species for further study. The Canadian Mineralogist, 45, 1307–1324.CrossRefGoogle Scholar
Plášil, J., Fejfarová, K., Dušek, M., Škoda, R. and Rohlíček, J. (2013) Revision of the symmetry and the crystal structure of čejkaite, Na4(UO2)(CO3)3 . American Mineralogist, 98, 549–553.CrossRefGoogle Scholar
Plášil, J., Hloušek, J., Kasatkin, A.V., Belakovskyi, D.I., Čejka, J. and Chernyshov, D. (2015) Ježekite, Na8[(UO2)(CO3)3](SO4)2·3H2O, a new uranyl mineral from Jáchymov, Czech Republic. Journal of Geosciences, 60, 259–267.CrossRefGoogle Scholar
Pouchou, J.L. and Pichoir, F. (1985) “PAP” (φρZ) procedure for improved quantitative microanalysis. Pp. 104–160 in: Microbeam Analysis (Armstrong, J.T., editor). San Francisco Press, San Francisco, USA Google Scholar
Sheldrick, G.M. (2008) A short history of SHELX. Acta Crystallographica, A64, 112–122.CrossRefGoogle Scholar
Sheldrick, G.M. (2015) SHELXT – Integrated spacegroup and crystal-structure determination. Acta Crystallographica, A71, 3–8.Google Scholar
Strand, E. (1954) Report on the North Markey Group Red Canyon District, DMEA docket 4260:DefenseMinerals Exploration Administration (DMEA) dockets, available online: http://minerals.usgs.gov/dockets/ut.htm Google Scholar
Urbanec, Z. and Čejka, J. (1979) Infrared spectra of rutherfordine and sharpite. Collection of Czechoslovak Chemical Communications, 44, 1–9.CrossRefGoogle Scholar
Wood, R.M. and Palenik, G.J. (1999) Bond valence sums in coordination chemistry. Sodium-oxygen complexes. Inorganic Chemistry, 38, 3926–3930.CrossRefGoogle Scholar