Zirsinalite Pudovkina Z V, Chernitsova N M, Voronkov A A, Pyatenko Yu A Doklady Akademii Nauk SSSR 250 (1980) 865-867 Crystal structure of zirsinalite Na6Ca{Zr(Si6O18)} Locality: Koashva Mountain, Khibiny Massif, Kola Peninsula, Russia _database_code_amcsd 0012464 10.593 10.593 10.593 58.13 58.13 58.13 R-3c atom x y z occ Biso Na1 .5 0 0 1.22 Na2 .743 .757 .25 1.15 Ca .3767 .3767 .3767 .5 1.16 Zr 0 0 0 .93 Si .1307 .1346 .5853 .93 O1 .255 .296 .938 1.31 O2 .950 .234 .968 1.33 O3 .013 .487 .25 3.31 O4 .518 .982 .25 1.24