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 Kim20_q0, untreated Locality: Kimito, Finland _database_code_amcsd 0018712 4.7561 4.7561 9.2880 90 90 90 P4_2/mnm atom x y z occ Fe(A) 0 0 0 .482 Ta(A) 0 0 0 .518 Fe(B) 0 0 .33282 .259 Ta(B) 0 0 .33282 .676 Nb(B) 0 0 .33282 .065 O1 .3029 .3029 0 O2 .3007 .3007 .3307