Weeksite Baturin S V Doklady Akademii Nauk SSSR 282 (1985) 1132-1136 Crystal-structure of weeksite _database_code_amcsd 0018510 7.092 17.888 7.113 90 90 90 Cmmm atom x y z occ Biso U 0 .1982 0 1.15 Si1 0 .3744 0 1.1 Si2 0 0 .117 .5 1.0 Si3 .095 .5 .282 .5 1.1 O1 0 .199 .248 1.1 O2 .174 .316 0 1.3 O3 0 .427 .190 2.4 O4 0 .071 0 11.0 O5 0 .5 .5 2.9 O6 .179 0 .268 .5 2.8 Wat1 0 0 .5 6.4 Wat2 .179 .325 .5 .50 3.8 K .179 .325 .5 .31 3.8 Na .179 .325 .5 .19 3.8