Grandidierite Dzikowski T J, Groat L A, Grew E S American Mineralogist 92 (2007) 863-872 The geometric effects of VFe2+ for VMg substitution on the crystal structures of the grandidierite-ominelite series Sample: G17 Locality: Madagascar _database_code_amcsd 0004348 10.3250 10.9575 5.7600 90 90 90 Pbnm atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Mg .09183 .21910 .25 .976 .0068 .0081 .0061 .0062 -.0013 0 0 Fe .09183 .21910 .25 .024 .0068 .0081 .0061 .0062 -.0013 0 0 Al1 0 0 0 .0052 .0056 .0050 .0050 .0001 -.0002 .0000 Al2 .5 0 0 .0055 .0047 .0065 .0052 -.0001 .0002 .0005 Al3 .22634 .44791 .25 .0053 .0048 .0056 .0055 -.0003 0 0 B .2512 .0003 .75 .0072 .0081 .0061 .0074 .0001 0 0 Si .43356 .26330 .25 .0056 .0062 .0047 .0058 .0000 0 0 O1 .2750 .2882 .25 .0084 .0068 .0060 .0124 -.0000 0 0 O2 .1186 .0224 .25 .0061 .0057 .0064 .0061 .0000 0 0 O3 .1210 -.0035 .75 .0067 .0053 .0091 .0058 .0002 0 0 O4 .4738 .1199 .25 .0072 .0100 .0054 .0063 .0010 0 0 O5 .5465 .1002 .75 .0061 .0060 .0060 .0061 -.0005 0 0 O6 -.00731 .17099 -.0227 .0075 .0098 .0056 .0071 .0002 -.0016 .0004 O7 .18068 .50112 -.0452 .0079 .0058 .0118 .0059 .0000 .0001 .0008