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 Kim5_q0, untreated Locality: Kimito, Finland _database_code_amcsd 0018701 4.7533 4.7533 9.2773 90 90 90 P4_2/mnm atom x y z occ Fe(A) 0 0 0 .524 Ta(A) 0 0 0 .476 Fe(B) 0 0 .33257 .238 Ta(B) 0 0 .33257 .697 Nb(B) 0 0 .33257 .065 O1 .3041 .3041 0 O2 .2985 .2985 .3304