Hercynite Andreozzi G B, Lucchesi S American Mineralogist 87 (2002) 1113-1120 Intersite distribution of Fe2+ and Mg in the spinel (sensu stricto) - hercynite series by single-crystal X-ray diffraction Sample: He6a/e _database_code_amcsd 0002878 8.1221 8.1221 8.1221 90 90 90 *Fd3m .125 .125 .125 atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Al .5 .5 .5 .884 .0044 .0044 .0044 .0000 .0000 .0000 Mg .5 .5 .5 .089 .0044 .0044 .0044 .0000 .0000 .0000 Fe .5 .5 .5 .027 .0044 .0044 .0044 .0000 .0000 .0000 Mg .125 .125 .125 .366 .0061 .0061 .0061 0 0 0 Al .125 .125 .125 .194 .0061 .0061 .0061 0 0 0 Fe .125 .125 .125 .440 .0061 .0061 .0061 0 0 0 O .26308 .26308 .26308 .0084 .0084 .0084 .0000 .0000 .0000