Tapiolite-(Fe) Zema M, Tarantino S C, Giorgiani A Mineralogical Magazine 70 (2006) 319-328 Structural changes induced by cation ordering in ferrotapiolite Note: Crystal Kim23_q0, untreated Locality: Kimito, Finland _database_code_amcsd 0018719 4.7551 4.7551 9.2818 90 90 90 P4_2/mnm atom x y z occ Fe(A) 0 0 0 .530 Ta(A) 0 0 0 .470 Fe(B) 0 0 .33261 .235 Ta(B) 0 0 .33261 .700 Nb(B) 0 0 .33261 .065 O1 .3015 .3015 0 O2 .2993 .2993 .3281