Chestermanite Alfredsson V, Bovin J O, Norrestam R, Terasaki O Acta Chemica Scandinavica 45 (1991) 797-804 The structure of the mineral chestermanite, Mg2.25Al0.16Fe0.43Ti0.02Sb0.13O2BO3. A combined single-crystal X-ray and HREM study _database_code_amcsd 0011934 18.5250 12.272 3.0218 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) MgM1 0 0 0 .484 .0056 .0056 .0057 .0056 .0001 0 0 AlM1 0 0 0 .034 .0056 .0056 .0057 .0056 .0001 0 0 FeM1 0 .5 0 .233 .0056 .0069 .0087 .0106 -.0014 0 0 TiM1 0 .5 0 .011 .0056 .0069 .0087 .0106 -.0014 0 0 SbM1 0 0 0 .482 .0056 .0056 .0057 .0056 .0001 0 0 MgM2 0 .5 0 .706 .0087 .0069 .0087 .0106 -.0014 0 0 AlM2 0 .5 0 .05 .0087 .0069 .0087 .0106 -.0014 0 0 MgM3 .1247 .1708 .5 .934 .0081 .0081 .0078 .0084 -.0008 0 0 AlM3 .1247 .1708 .5 .066 .0081 .0081 .0078 .0084 -.0008 0 0 FeM4 .1275 .3893 0 .181 .0082 .0087 .0060 .0099 .0002 0 0 TiM4 .1275 .3893 0 .009 .0082 .0087 .0060 .0099 .0002 0 0 MgM4 .1275 .3893 0 .756 .0082 .0087 .0060 .0099 .0002 0 0 AlM4 .1275 .3893 0 .054 .0082 .0087 .0060 .0099 .0002 0 0 FeM5 .2570 .2710 0 .44 .0075 .0064 .0076 .0086 -.0004 0 0 TiM5 .2570 .2710 0 .02 .0075 .0064 .0076 .0086 -.0004 0 0 MgM5 .2570 .2710 0 .504 .0075 .0064 .0076 .0086 -.0004 0 0 AlM5 .2570 .2710 0 .036 .0075 .0064 .0076 .0086 -.0004 0 0 MgM6 .3746 .1089 .5 .934 .0084 .0087 .0075 .0090 .0009 0 0 AlM6 .3746 .1089 .5 .066 .0084 .0087 .0075 .0090 .0009 0 0 MgM7 .3728 .3885 .5 .934 .0086 .0083 .0083 .0093 -.0008 0 0 AlM7 .3728 .3885 .5 .066 .0086 .0083 .0083 .0093 -.0008 0 0 B1 -.0115 .2513 0 .0082 B2 .2373 .0293 0 .0080 O1 .0686 .0317 .5 .0096 O2 .0629 .2472 0 .0086 O3 .0702 .4629 .5 .0124 O4 .1991 .1266 0 .0092 O5 .1834 .3137 .5 .0121 O6 .3117 .0313 0 .0088 O7 .3208 .2454 .5 .0107 O8 .3006 .4321 0 .0085 O9 .4507 .1525 0 .0091 O10 .4500 .3474 0 .0090