Ewingite: Earth’s most complex mineral

0482898 - FZÚ 2018 RIV US eng J - Článek v odborném periodiku
Olds, T.A. - Plášil, Jakub - Kampf, A.R. - Simonetti, A. - Sadergaski, L.R. - Chen, Y.-S. - Burns, P.C.
Ewingite: Earth’s most complex mineral.
Geology. Roč. 45, č. 11 (2017), s. 1007-1010. ISSN 0091-7613. E-ISSN 1943-2682
Grant CEP: GA MŠMT(CZ) LO1603
Institucionální podpora: RVO:68378271
Klíčová slova: ewingite * crystal structure * X-ray diffraction * Plavno mine
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 5.073, rok: 2017

The newly discovered mineral ewingite is the most structurally complex mineral known.
Ewingite is found in the abandoned Plavno mine in the Jáchymov ore district, western Bohemia (Czech Republic), and was studied by synchrotron X-ray diffraction. The structure of ewingite contains nanometer-scale anionic uranyl carbonate cages that contain 24 uranyl polyhedra, as well as Ca and Mg cations and H2O groups located in interstitial regions inside and between the cages. The discovery of ewingite suggests that nanoscale uranyl carbonate cages could be aqueous species in some systems, and these may affect the geochemical behavior of uranium.
Trvalý link: http://hdl.handle.net/11104/0278285