Ammoniozippeite, a New Uranyl Sulfate Mineral from the Blue Lizard Mine, San Juan County, Utah, and the Burro Mine, San Miguel County, Colorado, USA

Abstract

Research Article| May 30, 2018 Ammoniozippeite, a New Uranyl Sulfate Mineral from the Blue Lizard Mine, San Juan County, Utah, and the Burro Mine, San Miguel County, Colorado, USA Anthony R. Kampf; Anthony R. Kampf § Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, California 90007, U.S.A. § Corresponding author e-mail address: akampf@nhm.org Search for other works by this author on: GSW Google Scholar Jakub Plášil; Jakub Plášil Institute of Physics ASCR, v.v.i., Na Slovance 1999/2, 18221 Prague 8, Czech Republic Search for other works by this author on: GSW Google Scholar Travis A. Olds; Travis A. Olds Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, U.S.A. Search for other works by this author on: GSW Google Scholar Barbara P. Nash; Barbara P. Nash Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah 84112, U.S.A. Search for other works by this author on: GSW Google Scholar Joe Marty Joe Marty 5199 E. Silver Oak Road, Salt Lake City, Utah 84108, U.S.A. Search for other works by this author on: GSW Google Scholar Author and Article Information Anthony R. Kampf § Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, California 90007, U.S.A. Jakub Plášil Institute of Physics ASCR, v.v.i., Na Slovance 1999/2, 18221 Prague 8, Czech Republic Travis A. Olds Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, U.S.A. Barbara P. Nash Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah 84112, U.S.A. Joe Marty 5199 E. Silver Oak Road, Salt Lake City, Utah 84108, U.S.A. § Corresponding author e-mail address: akampf@nhm.org Publisher: Mineralogical Association of Canada First Online: 25 May 2018 Online Issn: 1499-1276 Print Issn: 0008-4476 © 2018 Mineralogical Association of Canada The Canadian Mineralogist (2018) 56 (3): 235–245. https://doi.org/10.3749/canmin.1800002 Article history First Online: 25 May 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Anthony R. Kampf, Jakub Plášil, Travis A. Olds, Barbara P. Nash, Joe Marty; Ammoniozippeite, a New Uranyl Sulfate Mineral from the Blue Lizard Mine, San Juan County, Utah, and the Burro Mine, San Miguel County, Colorado, USA. The Canadian Mineralogist 2018;; 56 (3): 235–245. doi: https://doi.org/10.3749/canmin.1800002 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyThe Canadian Mineralogist Search Advanced Search Abstract The new mineral ammoniozippeite (IMA2017-017), (NH4)2[(UO2)2(SO4)O2]·H2O, was found in both the Blue Lizard mine San Juan County, Utah, and the Burro mine, San Miguel County, Colorado, USA. At both mines, it occurs as a low-temperature, secondary phase. The mineral is yellow to yellowish orange with pale yellow streak and fluoresces dull green yellow under 405 nm laser light. Crystals are transparent and have vitreous luster. It is brittle, with Mohs hardness of about 2½, splintery fracture, and three cleavages: {010} and {001} perfect, {100} good. The calculated density for the ideal formula is 4.433 g/cm3. Crystals are acicular to bladed, elongate on [100], up to about 0.2 mm in length at the Blue Lizard, and up to 2 mm at the Burro. Ammoniozippeite is optically biaxial (+) with α = 1.678(2), β = 1.724(3), γ = 1.779(3) (white light); the measured 2V is 87.1(5)°; r < v dispersion is weak; the optical orientation is X = b, Y = c, Z = a; and pleochroism is X colorless, Y orange yellow, and Z yellow orange (X ≪ Y < Z). Electron microprobe analyses (WDS mode) provided the empirical formulae [(NH4)1.97Na0.03]Σ2.00(U1.00O2)2(S1.01O4)O2·H2O and [(NH4)1.99K0.06Na0.04]Σ2.09(U1.01O2)2(S0.97O4)O2·H2O for crystals from the Burro and Blue Lizard mines, respectively. The five strongest X-ray powder diffraction lines for Burro mine material are [dobs Å(I)(hkl)]: 7.17(100)(020), 3.580(21)(040), 3.489(42)(203), 3.138(63)(223), and 1.6966(18)(229,426). Ammoniozippeite is orthorhombic, Ccmb, a 8.7944(3), b 14.3296(7), c 17.1718(12) Å, V 2164.0(2) Å3, and Z = 8. The structure of ammoniozippeite (R1 = 0.0396 for 932 reflections with Io > 2σI) contains edge-sharing zig-zag chains of pentagonal bipyramids that are linked by sharing corners with SO4 groups, yielding a [(UO2)2(SO4)O2]2– sheet based on the zippeite-type topology. The interlayer region contains two NH4+ groups and one H2O group pfu, statistically distributed over three sites. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

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