Paul Keller: Ekatite, (Fe3+,Fe2+,Zn)12(OH)6[AsO3]6[AsO3,HOSiO3]2, a new mineral from Tsumeb, Namibia, and its crystal structure. In: European Journal of Mineralogy. Band13, 2001, S.767–777, doi:10.1127/0935-1221/2001/0013-0769 (rruff.info [PDF; 829kB]).
Paul Keller: Ekatite, (Fe3+,Fe2+,Zn)12(OH)6[AsO3]6[AsO3,HOSiO3]2, a new mineral from Tsumeb, Namibia, and its crystal structure. In: European Journal of Mineralogy. Band13, 2001, S.767–777, doi:10.1127/0935-1221/2001/0013-0769 (rruff.info [PDF; 829kB]).