Citation: Plasil, J.; Mills, S. J.; Fejfarova, K.; Dusek, M.; Novak, M.; Skoda, R.; Cejka, J.; Sejkora, J. (2011). The crystal structure of natural zippeite, K1.85H+0.15[(UO2)4O2(SO4)2(OH)2](H2O)4, from Jachymov, Czech Republic. The Canadian Mineralogist, 49, pp. 1089-1103.