Gonnardite
Lee Y, Hriljac J A, Parise J B, Vogt T
American Mineralogist 91 (2006) 247-251
Pressure-induced hydration in zeolite tetranatrolite
Locality: Mt. Saint-Hilaire, Quebec, Canada
Note: P = 6.9 GPa
Note: high-pressure superhydrated phase
_database_code_amcsd 0004013
12.761 12.761 6.5127 90 90 90 I-42d
atom     x     y     z  occ Uiso
Na    .694   .25  .125 .731 .026
Ca    .694   .25  .125 .237 .026
Si1      0     0     0 .537 .026
Al1      0     0     0 .463 .026
Si2  .0552 .1328 .6212 .537 .026
Al2  .0552 .1328 .6212 .463 .026
O1    .379   .25  .125      .026
O2    .144  .050  .542      .026
O3    .017  .111  .873      .026
Wat4  .125   .25  .125      .026
Wat5  .889   .25  .125      .026