Potassic-ferri-ferrorichterite Redhammer G J, Roth G European Journal of Mineralogy 14 (2002) 105-114 Crystal structure and Mossbauer spectroscopy of the synthetic amphibole potassic-ferri-ferrorichterite at 298 K and low temperatures (80-110 K) Sample: Ri15, T = 298 K _database_code_amcsd 0006923 10.1361 18.1648 5.3030 90 104.327 90 C2/m atom x y z occ Uiso KA2/m 0 .5 0 .0355 CaM4 0 .27751 .5 .26 .0128 NaM4 0 .27751 .5 .74 .0128 FeM1 0 .09181 .5 .0070 FeM2 0 .18397 0 .0067 FeM3 0 0 0 .0075 Si1 .27264 .08535 .29418 .0034 Si2 .28523 .17043 .80135 .0038 O1 .1103 .08988 .2104 .0061 O2 .1212 .17308 .7283 .0074 O3 .1058 0 .7084 .003 H .15 0 .70 .03 O4 .3642 .24536 .7971 .0094 O5 .3414 .12746 .0868 .0077 O6 .3363 .11632 .5871 .0080 O7 .3246 0 .2979 .0082