Sejkoraite-(Y), a new member of the zippeite group containing trivalent cations from Jáchymov (St. Joachimsthal), Czech Republic: Description and crystal structure refinement.

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Authors	PLÁŠIL Jakub DUŠEK Michal NOVÁK Milan ČEJKA Jiří CÍSAŘOVÁ Ivana ŠKODA Radek
Year of publication	2011
Type	Article in Periodical
Magazine / Source	American Mineralogist
MU Faculty or unit	Faculty of Science
Citation
Doi	http://dx.doi.org/10.2138/am.2011.3713
Field	Solid matter physics and magnetism
Keywords	sejkoraite-(Y); new mineral; uranyl; zippeite group; crystal structure; vibration spectroscopy; Jáchymov
Description	Sejkoraite-(Y) is a new member of the zippeite group from the Cervená vein, Jáchymov (Street Joachimsthal) ore district, Western Bohemia, Czech Republic. It grows on altered surface of relics of primary minerals: uraninite, chalcopyrite, and tennantite. The crystal structure of sejkoraite-(Y) has been solved by the charge flipping method from single-crystal X-ray diffraction data and refined to Robs = 0.060 with GOFobs = 2.38, based on 6511 observed reflections. Raman and infrared spectra of sejkoraite-(Y) are discussed.
Related projects:	Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)