Pickeringite Quartieri S, Triscari M, Viani A European Journal of Mineralogy 12 (2000) 1131-1138 Crystal structure of the hydrated sulphate pickeringite (MgAl2(SO4)4.22H2O): X-ray powder diffraction study _database_code_amcsd 0006848 6.1844 24.2715 21.2265 90 100.326 90 P2_1/c atom x y z occ Mg .3617 .5955 .0824 .93 Mn .3617 .5955 .0824 .07 Al1 .4301 .6141 .4240 Al2 .6996 .3417 .1983 S1 .0887 .2442 .5241 S2 .9799 .4623 .3886 S3 .1459 .1957 .2554 S4 .1596 .4735 .1022 O1 .1620 .2171 .4685 O2 .0390 .3032 .5060 O3 -.1047 .2196 .5413 O4 .2798 .2426 .5773 O5 .0335 .4340 .3310 O6 .9274 .5210 .3722 O7 .1796 .4587 .4379 O8 .7881 .4370 .4082 O9 .1509 .1821 .3232 O10 .2149 .2543 .2491 O11 -.0803 .1899 .2197 O12 .3039 .1616 .2288 O13 .1632 .4388 .1609 O14 .2281 .4365 .0533 O15 -.0656 .4921 .0812 O16 .3108 .5194 .1156 Wat1 .6861 .5911 .1187 Wat2 .3388 .6314 .1670 Wat3 .4270 .6667 .0405 Wat4 .0497 .6116 .0508 Wat5 .3912 .5589 -.0006 Wat6 .4861 .5548 .3687 Wat7 .1246 .6174 .3866 Wat8 .5764 .6622 .3741 Wat9 .3407 .6758 .4702 Wat10 .7324 .6062 .4596 Wat11 .3432 .5602 .4802 Wat12 .5275 .3426 .1147 Wat13 .9699 .3185 .1765 Wat14 .5918 .2680 .2072 Wat15 .8348 .3422 .2873 Wat16 .4137 .3626 .2124 Wat17 .7580 .4184 .1884 Wat18 .7474 .2636 .3532 Wat19 .2687 .5329 .2712 Wat20 .6925 .5153 .2283 Wat21 .3875 .4069 .3387 Wat22 .4065 .2859 .4173