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.Základní údaje
Originální název
Alwilkinsite-(Y), a new rare-earth uranyl sulfate mineral from the Blue Lizard mine, San Juan County, Utah, USA
Autoři
KAMPF, Antony (840 Spojené státy), Jakub PLÁŠIL (203 Česká republika), Jiří ČEJKA (203 Česká republika), Joe MARTY (840 Spojené státy), Radek ŠKODA (203 Česká republika, garant, domácí) a Ladislav LAPČÁK (203 Česká republika)
Vydání
Mineralogical Magazine, Middlesex, Mineralogical Society, 2017, 0026-461X
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10504 Mineralogy
Stát vydavatele
Velká Británie a Severní Irsko
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 1.744
Kód RIV
RIV/00216224:14310/17:00100325
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000417988100009
Klíčová slova anglicky
alwilkinsite-(Y); new mineral; uranyl sulfate; crystal structure; Blue Lizard mine; Utah; USA
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 28. 3. 2018 13:31, Ing. Nicole Zrilić
Anotace
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.
Návaznosti
MUNI/A/1316/2015, interní kód MU |
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