Congolite Dowty E, Clark J R Zeitschrift fur Kristallographie 138 (1973) 64-99 Crystal-structure refinements for orthorhombic boracite, Mg3B7O13Cl, and a trigonal, iron-rich analogue Locality: Bischofferode, Thuringen, Germany _database_code_amcsd 0010745 8.612 8.612 21.0650 90 90 120 R3c atom x y z occ Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Fe .1480 .2971 .327 .8 .74 .0034 .0038 .00038 .0019 .0001 .0003 Mg .1480 .2971 .327 .2 .74 .0034 .0038 .00038 .0019 .0001 .0003 B11 .162 -.169 .0828 .59 .0024 .0057 .0002 .0032 -.0003 -.0004 B2 .099 -.105 -.0286 .78 .0011 .0043 .0002 .0006 -.0006 -.0009 B3 0 0 .102 .96 .0028 .0028 .0009 .0014 0 0 O1 0 0 -.0126 .70 .0023 .0023 .0006 .0011 0 0 O21 -.160 -.001 .1056 .59 .0018 .0024 .0004 .0009 -.0002 -.0002 O22 .289 0.261 -.0353 .64 .0024 .0035 .0003 .0014 -.0001 -.0003 O23 .199 -.022 -.0869 .67 .0025 .0030 .0001 -.0005 -.0001 -.0001 O24 -.306 -.226 .0204 .66 .0049 .0012 .0003 .0011 .0001 .0003 Cl 0 0 .2654 1.16 .0050 .005 .0007 .0025 0 0