Tychite
Watanabe T
Scientific Papers of the Institute of Physical and Chemical Research 21 (1933) 40-62
Les structures cristallines de la northupite 2MgCO32Na2CO32NaCl
et de la tychite 2MgCO32Na2CO3Na2SO4
_database_code_amcsd 0015445
13.90 13.90 13.90 90 90 90 Fd3
atom     x     y     z
Mg    .625  .625  .625
C     .150  .150  .850
Na       0  .225     0
S        0     0     0
O1    .125  .102  .777
O2   .0625 .0625 .0625