Hyalophane De Pieri R, Quareni S, Hall K M Acta Crystallographica B33 (1977) 3073-3076 Refinement of the structures of low and high hyalophanes Sample: High hyalophane _database_code_amcsd 0009609 8.556 13.045 7.189 90 115.63 90 C2/m atom x y z occ K .28321 0 .1327 .43 Ba .28321 0 .1327 .39 Na .28321 0 .1327 .17 Ca .28321 0 .1327 .01 Si1 .0088 .18313 .2244 .645 Al1 .0088 .18313 .2244 .355 Si2 .7059 .11771 .3458 .645 Al2 .7059 .11771 .3458 .355 O1a 0 .1424 0 O1b .6278 0 .2879 O2 .8275 .1412 .2250 O3 .0305 .3099 .2559 O4 .1833 .1258 .4022