Richterite Robert J-L, Della Ventura G, Raudsepp M, Hawthorne F C European Journal of Mineralogy 5 (1993) 199-206 Rietveld structure refinement of synthetic strontium-rich potassium-richterites Sample: KSr_0 _database_code_amcsd 0006475 10.0547 17.997 5.2746 90 104.832 90 C2/m atom x y z occ Biso KA .0213 .5 .0270 .5 2.3 MgM1 0 .0895 .5 .6 MgM2 0 .1798 0 .6 MgM3 0 0 0 .6 NaM4 0 .2761 .5 .5 .9 CaM4 0 .2761 .5 .5 .9 SiT1 .2761 .0859 .3013 .4 SiT2 .2843 .1710 .8024 .4 O1 .1079 .0880 .2149 .8 O2 .1136 .1716 .7176 .8 OH3 .1078 0 .7236 .8 O4 .3542 .2486 .7854 .8 O5 .3345 .1300 .0945 1.1 O6 .3399 .1159 .6030 1.1 O7 .3271 0 .3072 1.2