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_q6, treated at 650 C for 15 min
Locality: Kimito, Finland
_database_code_amcsd 0018718
4.7507 4.7507 9.2794 90 90 90 P4_2/mnm
atom      x     y      z  occ
Fe(A)     0     0      0 .502
Ta(A)     0     0      0 .498
Fe(B)     0     0 .33266 .249
Ta(B)     0     0 .33266 .686
Nb(B)     0     0 .33266 .065
O1    .3014 .3014      0
O2    .2995 .2995  .3306