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_100 _database_code_amcsd 0006477 10.1534 18.115 5.2723 90 105.421 90 C2/m atom x y z occ Biso KA .0127 .5 .0228 .5 2.3 MgM1 0 .0898 .5 .6 MgM2 0 .1799 0 .6 MgM3 0 0 0 .6 NaM4 0 .2804 .5 .5 .9 SrM4 0 .2804 .5 .5 .9 SiT1 .2717 .0848 .3071 .4 SiT2 .2840 .1709 .8115 .4 O1 .1025 .0876 .2185 .8 O2 .1172 .1696 .7268 .8 OH3 .1085 0 .7188 .8 O4 .3557 .2468 .8013 .8 O5 .3372 .1282 .1054 1.1 O6 .3351 .1136 .6052 1.1 O7 .3275 0 .3100 1.2