Cymrite-K Fasshauer D W, Chatterjee N D, Marler B Physics and Chemistry of Minerals 24 (1997) 455-462 Synthesis, structure, thermodynamic properties, and stability relations of K-cymrite, K[AlSi3O8].H2O _database_code_amcsd 0008028 5.3348 5.3348 7.7057 90 90 120 P6/mmm atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) K 0 0 0 .03730 Al 1/3 2/3 .28831 .25 .01243 Si 1/3 2/3 .2883 .75 .01243 O1 .5 0 .21369 .01419 O2 1/3 2/3 .5 .01429 Wat 0 0 .5 .0103 .0103 .2231 .0052 0 0