Sursassite Nagashima M, Akasaka M, Minakawa T, Libowitzky E, Armbruster T American Mineralogist 94 (2009) 1440-1449 Sursassite: hydrogen bonding, cation order, and pumpellyite intergrowth Locality: Molinello, Italy Sample Number: 5 _database_code_amcsd 0004990 8.6982 5.7887 9.7777 90 108.918 90 P2_1/m atom x y z occ Mn1 .16738 .25 .31398 Mn2 .26707 .25 .67527 Al1 .5 0 .5 Al2 .5 0 0 Al3 0 .5 0 Si1 .3078 .75 .1925 Si2 .2069 .75 .8078 Si3 .1573 .75 .4944 O1 .2654 .5140 .5027 O2 .1916 .5238 .1637 O3 .3143 .5174 .8342 O4 .4154 .75 .0823 O5 .4482 .75 .3542 O6 .0848 .25 .9295 O7 .4390 .25 .3692 O8 .0717 .75 .8940 O9 .0912 .75 .6363 O10 -.0074 .75 .3574 O11 .4129 .25 .0738 H6A .05 .25 .824 .5 H6B .201 .25 .94 .5 H7 .325 .25 .31 H11A .295 .25 .05 .5 H11B .40 .25 .168 .5