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: G4 Locality: Sahakondra, Ampamatoa, Madagascar _database_code_amcsd 0004350 10.3317 10.9904 5.7634 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 .09292 .21903 .25 .818 .0103 .0124 .0101 .0085 -.0017 0 0 Fe .09292 .21903 .25 .182 .0103 .0124 .0101 .0085 -.0017 0 0 Al1 0 0 0 .0078 .0085 .0084 .0064 .0002 .0001 .0000 Al2 .5 0 0 .0080 .0078 .0096 .0066 -.0001 .0002 .0005 Al3 .22643 .44795 .25 .0084 .0081 .0097 .0073 -.0002 0 0 B .2512 .0003 .75 .0099 .011 .010 .009 .0008 0 0 Si .43376 .26334 .25 .0085 .0096 .0082 .0076 -.0002 0 0 O1 .2755 .2888 .25 .0113 .0100 .0095 .0143 -.0001 0 0 O2 .1184 .0216 .25 .0090 .0086 .0107 .0075 -.0001 0 0 O3 .1212 -.0036 .75 .0094 .0087 .0121 .0075 .0003 0 0 O4 .4739 .1201 .25 .0101 .0127 .0091 .0085 .0010 0 0 O5 .5463 .0997 .75 .0089 .0094 .0092 .0080 -.0004 0 0 O6 -.00720 .1708 -.0225 .0102 .0129 .0084 .0094 .0003 -.0018 .0003 O7 .1807 .50117 -.0453 .0107 .0089 .0151 .0079 .0005 .0002 .0010