Hydrokenoralstonite
Pabst A
American Mineralogist 24 (1939) 566-576
Formula and structure of ralstonite
Locality: Ivigtut, Greenland
_database_code_amcsd 0000023
9.87 9.87 9.87 90 90 90 Fd3m
atom    x    y    z  occ
Na   .625 .625 .625 .175
Al   .125 .125 .125 .812
Mg   .125 .125 .125 .188
F    .190    0    0 .647
OH1  .190    0    0 .353
OH2    .5   .5   .5 .875