Brewsterite-Sr Perrotta A J, Smith J V Acta Crystallographica 17 (1964) 857-862 The crystal structure of brewsterite, (Sr,Ba,Ca)(Al2Si6O16)*5H2O Locality: Strontian, Argyll, Scotland Note: zeolite _database_code_amcsd 0009286 6.772 17.51 7.744 90 94.30 90 P2_1/m atom x y z occ Biso Sr .2507 .25 .1778 .58 1.02 Ba .2507 .25 .1778 .30 1.02 Ca .2507 .25 .1778 .14 1.02 AlA .3187 .0814 .8220 .33 .95 AlB .4053 .0568 .2105 .33 .84 AlC .5566 .1584 .5345 .33 .86 SiA .3187 .0814 .8220 .67 .95 SiB .4053 .0568 .2105 .67 .84 SiC .5566 .1584 .5345 .67 .86 SiD .9106 .0527 .6412 .88 O1 .3461 .1057 .0286 1.5 O2 .4244 .1227 .3600 2.4 O3 .7909 .1214 .5466 1.5 O4 .4519 .1406 .7141 1.6 O5 .0731 .0915 .7604 2.3 O6 .2212 .9970 .2379 2.5 O7 .3835 .9920 .7959 1.7 O8 0 0 .5 2.6 O9 .5765 .25 .4986 2.1 Wat1 .0545 .25 .4703 .98 3.5 Wat2 .9319 .1469 .1537 .98 5.7 Wat3 .5896 .25 .0256 .98 4.6 Wat4 .0544 .25 .8642 .98 2.5