Aphthitalite
Okada K, Ossaka J
Acta Crystallographica B36 (1980) 919-921
Structures of potassium sodium sulphate and tripotassium sodium disulphate
_database_code_amcsd 0009708
5.6801 5.6801 7.309 90 90 120 P-3m1
atom     x      y     z
K1       0      0     0
Na2      0      0    .5
K3     2/3    1/3 .6831
S      2/3    1/3 .2338
O1     2/3    1/3 .0316
O2   .8073 -.8073 .3018