Clinokurchatovite Simonov M A, Egorov-Tismenko Y K, Yamnova M A, Belokoneva E L, Belov N V Soviet Physics Doklady 25 (1980) 1125-1128 Crystal structure of natural monoclinic kurchatovite Ca2(Mg0.86Fe0.14)(Mg0.92Fe0.08)[B2O5]2 _database_code_amcsd 0015608 12.45 5.514 11.145 90 90 104.13 P2_1/b atom x y z occ Biso Ca1 .58981 .93362 .37295 .6 Ca2 .09302 .46114 .38168 .63 Mg1 .26278 .5108 .12778 .86 .31 Fe1 .26278 .5108 .12778 .14 .31 Mg2 .76430 .0096 .12796 .92 .28 Fe2 .76430 .0096 .12796 .08 .28 B1 .8272 .0384 .3833 .58 B2 .3263 .5284 .3758 .6 B3 .9913 .3647 .1243 .63 B4 .4892 .8412 .1199 .6 O1 .4422 .5513 .3721 .75 O2 .9433 .0723 .3902 .71 O3 .4307 .6151 .0817 .68 O4 .0953 .4133 .1696 .76 O5 .9338 .1314 .0932 .69 O6 .7750 .1730 .4555 .73 O7 .7690 .8664 .3047 .68 O8 .2822 .6744 .3023 .67 O9 .2605 .3580 .4503 .69 O10 .5956 .8817 .1592 .74