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  • Author(s):
    Jakub Plášil, Anthony R. Kampf, Peter C. Burns
    Abstract:

    Redcanyonite (IMA2016-082), (NH4)2Mn(UO2)4O4(SO4)24, occursunderground in the Blue Lizard mine, Red Canyon, White Canyon district,San Juan County, Utah, USA. It occurs with natrozippeite, brochantite, devilline, posnjakite, johannite, gypsum, bobcookite, pickingerite, pentahydrite, and the NH4-analog of zippeite, ammoniozippeite. Redcanyonite occurs as radial aggregates of red-orange needles and blades individually reaching up to 0.2 mm in length, with aggregates measuring up to 1 mm i…

    Date Published:
    2018-05
  • Author(s):
    Yi Liu, Blake Becker, Brandon Burdine, Ginger E. Sigmon, Peter C. Burns
    Abstract:

    Mesoporous uranium-doped TiO2 anatase materials were studied to determine the influence of U-doping on the photocatalytic properties for Rhodamine B (RhB) degradation. The physico-chemical properties of the samples were characterized and the results of X-ray diffraction, transmission electron microscopy, and Raman spectroscopy demonstrate homogeneous incorporation of uranium into the anatase lattice. X-ray photoelectron spectroscopy of the doped anatase confirmed the dominance of the U4+ spec…

    Date Published:
    2017
  • Author(s):
    Travis A. Olds, Luke R. Sadergaski , Jakub Plášil, Anthony R. Kampf, Peter C. Burns, Ian M. Steele, Joe Marty, Shawn M. Carlson, Owen P. Mills
    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 occ…

    Date Published:
    2017
  • Author(s):
    Sergey M. Aksenov, Natalia A. Yamnova, Elena Yu. Borovikova, Anatoly S. Volkov, Dmitry A. Ksenofontov, Olga V. Dimitrova, Olga A. Gurbanova, Dina V. Deyneko, Fabrice Dal Bo, Peter C. Burns
    Abstract:

    The bismuth(III) oxophosphate Bi3(PO4)O3 was obtained by hydrothermal synthesis. The unit cell has a = 5.6840(6) Å, b = 7.0334(7) Å, c = 9.1578(9) Å, α = 78.958(2)°, β = 77.858(2)°, γ = 68.992(2)°, V = 331.41(6) Å3, space group P1̅, and Z = 2. The crystal chemical formula that reflects the presence of oxo-centered tetrahedra and triangles is 2DOIIIOIV2Bi3. The crystal structure contains [O3Bi3]3+∞∞-heteropolyhedral corrugated layers parallel to (001), which alternate along [001] with i…

    Date Published:
    2018
  • Author(s):
    Hulya Kacmaz, Peter C. Burns
    Abstract:

    The Koprubasi uranium deposit is the largest known uranium deposits in Turkey. Uranium mineralization is hosted in Neogene fluvial sediments that consist of predominantly sandstone and conglomerate interlayered with siltstone, claystone and mudstone. Sediments were primarily derived from metamorphic rocks adjacent to the basins of deposition, with some volcanic contribution in the form of tuffs. The sandstones and conglomerates are the most widespread sediments within the study area and host …

    Date Published:
    2017