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_q5, treated at 600 C for 650 min
Locality: Kimito, Finland
_database_code_amcsd 0018717
4.7506 4.7506 9.2811 90 90 90 P4_2/mnm
atom      x     y      z  occ
Fe(A)     0     0      0 .499
Ta(A)     0     0      0 .501
Fe(B)     0     0 .33266 .250
Ta(B)     0     0 .33266 .685
Nb(B)     0     0 .33266 .065
O1    .3034 .3034      0
O2    .2988 .2988  .3298