Osumilite Winter W, Armbruster T, Lengauer C European Journal of Mineralogy 7 (1995) 277-286 Crystal structure refinement of synthetic osumilite-type phases: BaMg2Al6Si9O30, SrMg2Al6Si9O30 and Mg2Al4Si11O30 Sample: CBa, BaMg2Al6Si9O30 _database_code_amcsd 0006585 10.129 10.129 14.340 90 90 120 P6/mcc atom x y z occ Biso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) BaC 0 0 1/4 1.847 .0238 .0238 .0225 .01191 .0000 .0000 MgA 1/3 2/3 1/4 .53 .0062 .0062 .0078 .0031 .0000 .0000 SiT1 .10461 .35270 .10916 .75 .629 .0081 .0101 .0060 .0048 .0001 -.0010 AlT1 .10461 .35270 .10916 .25 .629 .0081 .0101 .0060 .0048 .0001 -.0010 AlT2 1/2 1/2 1/4 .53 .0086 .0086 .0054 .0063 .0000 .0000 O1 .1205 .4016 0 1.41 .026 .019 .0077 .010 .0000 .0000 O2 .2134 .2807 .1367 1.86 .0273 .036 .0200 .0255 -.0001 -.0033 O3 .1386 .4951 .17939 .90 .0120 .0137 .0099 .0075 -.0015 -.0033