Richterite Senda K, Ishida K, Jenkins D M American Mineralogist 90 (2005) 1062-1071 X-ray Rietveld refinement and FTIR spectra of synthetic (Si,Ge)-richterites Sample: Ge4Ri, Si48Ge52 _database_code_amcsd 0003794 10.1237 18.147 5.3386 90 105.067 90 C2/m atom x y z occ Biso NaA .0 .5 .0 .45 2.68 Ca4 .0 .2773 .5 .49 1.58 Na4 .0 .2773 .5 .51 1.58 Mg1 .0 .0882 .5 .47 Mg2 .0 .1783 .0 .61 Mg3 .0 .0 .0 .42 Si1 .2803 .0850 .304 .58 .51 Ge1 .2803 .0850 .304 .42 .51 Si2 .2856 .1731 .8087 .39 .50 Ge2 .2856 .1731 .8087 .61 .50 O1 .113 .0839 .217 .69 O2 .113 .1702 .726 .64 OH3 .106 .0 .725 .64 O4 .355 .2495 .790 .96 O5 .346 .1365 .121 .86 O6 .342 .1099 .624 .84 O7 .339 .0 .262 .93