Dumortierite Alexander V D, Griffen D T, Martin T J American Mineralogist 71 (1986) 786-794 Crystal chemistry of some Fe- and Ti-poor dumortierites Sample: #11, USNM 141800, from Ambositra, Madagascar _database_code_amcsd 0001025 11.802 20.222 4.695 90 90 90 Pmcn atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Si1 .75 .4057 .0873 .99 .0024 .0084 .0027 0 0 .0002 Si2 .5246 .3282 .5873 .98 .0052 .0042 .0033 -.0012 .0002 .0002 Al1 .75 .2498 .3973 .85 .0079 .0119 .0547 0 0 -.0005 Al2 .6102 .4725 .5580 .98 .0028 .0038 .0032 -.0005 .0001 -.0002 Al3 .4910 .4310 .0597 .97 .0024 .0034 .0029 .0000 .0000 -.0003 Al4 .3585 .2890 .0576 .99 .0048 .0059 .0065 .0011 -.0005 -.0016 B .25 .4156 .2267 .0066 .0072 .0064 0 0 .0026 O1 .75 .4539 .3765 .0040 .0134 .0077 0 0 -.0020 O2 .75 .3259 .1494 .0150 .0159 .0113 0 0 .0042 O3 .6397 .4241 .8953 .0064 .0115 .0062 .0008 .0006 .0008 O4 .4362 .2825 .3994 .0065 .0107 .0077 -.0020 -.0015 .0003 O5 .5504 .3933 .3956 .0069 .0086 .0073 -.0007 -.0003 -.0005 O6 .4539 .3501 .8807 .010 .0103 .0073 -.0032 .0005 -.0008 O7 .6397 .2867 .6478 .0136 .0155 .0130 .0014 -.0025 .0012 O8 .25 .3502 .1623 .0078 .0081 .0116 0 0 -.0022 O9 .3511 .4480 .2540 .0059 .0127 .0101 -.0012 .0011 -.0020 O10 .25 .2723 .7614 .0082 .0154 .0072 0 0 -.0011 O11 .4661 .4881 .7503 .0067 .0099 .0054 -.0007 .0007 -.0002