Ludwigite Irwin M B, Peterson R C The Canadian Mineralogist 37 (1999) 939-943 The crystal structure of ludwigite Locality: Crestmore quarry, California, USA _database_code_amcsd 0005628 9.2411 12.2948 3.0213 90 90 90 Pbam atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Mg1 0 0 0 .99 .0057 .0053 .0054 .0065 -.0008 0 0 Fe1 0 0 0 .01 .0057 .0053 .0054 .0065 -.0008 0 0 Mg2 .5 0 .5 .443 .0070 .0095 .0043 .0065 -.0004 0 0 Fe2 .5 0 .5 .557 .0070 .0095 .0043 .0065 -.0004 0 0 Mg3 .0023 .2798 0 .99 .0052 .0057 .0040 .0058 .0005 0 0 Fe3 .0023 .2798 0 .01 .0052 .0057 .0040 .0058 .0005 0 0 Al4 .2399 .1145 .5 .08 .0049 .0048 .0050 .0049 -.0010 0 0 Fe4 .2399 .1145 .5 .92 .0049 .0048 .0050 .0049 -.0010 0 0 B .2743 .3600 .5 .0056 .0062 .0049 .0057 .0006 0 0 O1 .8502 .0434 .5 .0069 .0063 .0054 .0090 -.0007 0 0 O2 .3841 .0772 0 .0072 .0067 .0057 .0095 .0006 0 0 O3 .6253 .1424 .5 .0072 .0060 .0064 .0091 .0003 0 0 O4 .1092 .1424 0 .0064 .0063 .0053 .0077 .0001 0 0 O5 .8508 .2373 .5 .0075 .0081 .0048 .0088 .0004 0 0