Cu3Na2(Si4O12) Kawamura K, Kawahara A Acta Crystallographica B32 (1976) 2419-2422 Crystal structure of synthetic copper sodium silicate: Cu3Na2(Si4O12) Locality: synthetic _database_code_amcsd 0020110 7.519 10.203 13.567 90 90 90 Pnma atom x y z Biso Cu1 .2629 .25 .2186 .41 Cu2 .25 .25 .4397 .36 Cu3 0 0 0 .37 Si1 .2218 .5218 .3378 .33 Si2 .3200 .5350 .1233 .31 Na1 .0319 .75 .1737 1.38 Na2 .1872 .75 .4872 1.03 O1 .2336 .3702 .3296 .66 O2 .2898 .3811 .1200 .87 O3 .0291 .5761 .3804 .79 O4 .2391 .5298 .2277 .59 O5 .3715 .5928 .4043 .52 O6 .2171 .6094 .0344 .61