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