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
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