Detailed Information on Publication Record
2017
Alwilkinsite-(Y), a new rare-earth uranyl sulfate mineral from the Blue Lizard mine, San Juan County, Utah, USA
KAMPF, Antony, Jakub PLÁŠIL, Jiří ČEJKA, Joe MARTY, Radek ŠKODA et. al.Basic information
Original name
Alwilkinsite-(Y), a new rare-earth uranyl sulfate mineral from the Blue Lizard mine, San Juan County, Utah, USA
Authors
KAMPF, Antony (840 United States of America), Jakub PLÁŠIL (203 Czech Republic), Jiří ČEJKA (203 Czech Republic), Joe MARTY (840 United States of America), Radek ŠKODA (203 Czech Republic, guarantor, belonging to the institution) and Ladislav LAPČÁK (203 Czech Republic)
Edition
Mineralogical Magazine, Middlesex, Mineralogical Society, 2017, 0026-461X
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10504 Mineralogy
Country of publisher
United Kingdom of Great Britain and Northern Ireland
Confidentiality degree
není předmětem státního či obchodního tajemství
Impact factor
Impact factor: 1.744
RIV identification code
RIV/00216224:14310/17:00100325
Organization unit
Faculty of Science
UT WoS
000417988100009
Keywords in English
alwilkinsite-(Y); new mineral; uranyl sulfate; crystal structure; Blue Lizard mine; Utah; USA
Tags
International impact, Reviewed
Změněno: 28/3/2018 13:31, Ing. Nicole Zrilić
Abstract
V originále
The new mineral alwilkinsite-(Y) (IMA2015-097), Y(H2O)(7)[(UO2)(3)(SO4)(2)O(OH)(3)]center dot 7H(2)O, was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. The mineral is slightly flexible before brittle failure with splintery fracture and perfect cleavage parallel to [010], has Mohs hardness of similar to 2-2 1/2, exhibits dull greenish-grey fluorescence and has a calculated density of 3.371 g cm(-3). Alwilkinsite-(Y) occurs as yellowish-green needles, elongate on [010], with domatic terminations and exhibits the forms {102}, {301} and {12 (4) over bar}. It is optically biaxial (+) with alpha = 1.573(1), beta = 1.581(1), gamma = 1.601(1) (white light), the measured 2V is 65.3(1)degrees, the dispersion is r < nu (weak), the optical orientation is X = c, Y = a, Z = b and there is no pleochroism. Electron microprobe analyses yielded the empirical formula (Y0.66Dy0.08Gd0.06Er0.05Nd0.03Yb0.03Sm0.02Ce0.01)(Sigma 0.94) (H2O)(7) [(UO2)(3)(S1.01O4)(2)O(OH)(3)]center dot 7H(2)O. The eight strongest powder X-ray diffraction lines are [d(obs) angstrom(I)(hkl)]: 9.88(100)(101,002), 7.47(13)(102), 5.621(17)(103,201), 4.483(18)(104), 3.886(14)(130,222), 3.322(46) (multiple), 3.223(13)(multiple) and 3.145(16)(034). Alwilkinsite-(Y) is orthorhombic, P2(1)2(1)2(1), a = 11.6194(5), b = 12.4250(6), c = 19.4495(14) angstrom, V = 2807.9(3) angstrom(3) and Z = 4. The structure of alwilkinsite-(Y) (R-1 = 0.042 for 4244 F-o > 4 sigma F) contains edge-sharing chains of uranyl bipyramids with outlying sulfate tetrahedra that are similar to the chain linkages within the uranyl sulfate sheets of the zippeite structure. Short segments of the uranyl sulfate chains in the alwilkinsite-(Y) structure have the same topology as portions of the uranyl sulfate linkages in uranopilite. Alwilkinsite-(Y) is named for Alan (Al) J. Wilkins, MD (born 1955), the discoverer of the mineral.
Links
| MUNI/A/1316/2015, interní kód MU |
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