Mendozite Fang J H, Robinson P D American Mineralogist 57 (1972) 1081-1088 Crystal structures and mineral chemistry of double-salt hydrates: II. The crystal structure of mendozite, NaAl(SO4)2.11H2O _database_code_amcsd 0000289 21.75 9.11 8.30 90 92.47 90 C2/c atom x y z Biso Na 0 0 0 2.05 Al .25 .25 0 1.00 S .1314 .2532 .5295 1.22 O1 .1461 .3955 .6107 1.82 O2 .0747 .1926 .5903 2.56 O3 .1840 .1544 .5654 2.49 O4 .1248 .2758 .3548 2.40 Wat1 .2306 .3024 .2100 1.87 Wat2 .1832 .1231 .9857 1.86 Wat3 .1979 .4037 .9193 1.58 Wat4 0 .1231 .25 2.99 Wat5 .0683 .1864 .9161 2.25 Wat6 .0358 .4291 .1101 3.68