Borcarite Yamnova N A, Simonov M A, Kazanskaya E V, Belov N V Soviet Physics Doklady 20 (1975) 799-801 Refinement of the crystal structure of the Ca, Mg-carbonatoborate borcarite Ca4Mg/B4O6(OH)6/(CO3)2 Locality: Solongo metasomatite deposit, Buryatia, Russia _database_code_amcsd 0020477 4.445 17.843 8.378 90 90 101.94 A2/m atom x y z Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Ca1 .1548 .15531 .23368 .67 .01123 .00045 .00219 .00025 -.00056 -.00006 Mg1 0 0 0 .51 .00608 .00028 .00271 .00012 0 0 B1 .5 0 .2408 .55 .00846 .00040 .00219 .00006 0 0 B2 .6181 .0949 0 .59 .00674 .00046 .00245 .00012 0 0 C1 .7509 .1954 .5 .72 .00898 .00047 .00320 -.00051 0 0 O1 .3074 .0992 0 .65 .00727 .00050 .00286 .00029 0 0 O2 .7203 .0549 .1426 .61 .00846 .00045 .00215 -.00003 -.00007 .00013 OH3 .3095 .0415 .3391 .76 .01031 .00064 .00264 .00090 .00077 -.00025 O4 .6465 .2153 .3659 1.42 .02220 .00080 .00591 -.00090 -.00617 .00082 OH5 .8230 .1742 0 .74 .00951 .00038 .00387 -.00003 0 0 O6 .9617 .1566 .5 1.24 .01559 .00113 .00476 .00183 0 0