Marialite
Papike J J, Zoltai T
American Mineralogist 50 (1965) 641-655
The crystal structure of a marialite scapolite
_database_code_amcsd 0000134
12.060 12.060 7.572 90 90 90 I4/m
atom     x     y     z  occ Biso
Na   .1340 .2113     0  .79 2.65
Ca   .1340 .2113     0  .19 2.65
K    .1340 .2113     0  .02 2.65
Si1  .3388 .4104     0       .82
Si2  .3374 .0851 .2060  .55  .76
Al2  .3374 .0851 .2060  .46  .76
O1   .4587 .3483     0      1.60
O2   .3066 .1206     0      2.14
O3   .0517 .3500 .2148      1.55
O4   .2293 .1289 .3281      1.37
Cl       0     0     0  .95