Studenitsite
Yamnova N A, Egorov-Tismenko Y K, Pushcharovskii D Y, Malinko S V, Dorokhova G I
Crystallography Reports 38 (1993) 749-752
Crystal structure of a new natural Na,Ca-hydroborate NaCa2[B9O14(OH)4]*2H2O
Locality: volcanic ash deposit, near Belgrade, Yugoslavia
_database_code_amcsd 0012343
11.503 10.53 12.58 90 90 99.48 P2_1/b
atom      x      y      z Biso
Na    .5116  .9772  .1400 1.70
Ca1  .12868 .46906 .12912  .67
Ca2  .65432 .63452 .10010  .54
B1    .9365  .6585  .0861  .69
B2    .5695  .8145  .4313  .60
B3    .8876  .8187  .2187  .67
B4    .9475  .1739  .0212  .96
B5    .5008  .2283  .2393  .53
B6    .3906  .0966  .3796  .52
B7    .9086  .2041  .8301  .72
B8    .3112  .1061  .7287  .61
B9    .2943  .2569  .2902  .70
O1    .6084  .7987  .2141  .57
O2    .4014  .3068  .2490  .78
O3    .8105  .8688  .2814  .84
O4    .4576  .1756  .4640  .77
O5    .2818  .6498  .1470  .88
O6    .6458  .4080  .1182  .72
O7    .4695  .6038  .2101  .52
O8    .5146  .2090  .1235  .81
Oh9   .3499  .9626  .4144  .75
O10   .0412  .1619  .3493  .80
O11   .0365  .7775  .4802  .94
O12   .1991  .3158  .2666  .92
Oh13  .8824  .0290  .4430 1.07
O14   .0062  .8582  .2344  .75
Oh15  .6941  .0246  .2258  .87
O16   .8506  .7266  .1427  .88
O17   .8840  .1349  .9326 1.10
Ow18  .2847  .1946  .0307 1.90
Oh19  .9188  .1049  .1142 1.62
Ow20  .6479  .0563  .9783 2.23
H1     .138   .014   .603  4.3
H2     .765   .054   .186  3.1
H3     .721   .078   .967  5.2
H4     .628   .090   .630  5.3
H5     .978   .132   .167  6.7
H6     .216   .144   .031  7.3
H7     .359   .931   .953 14.7
H8     .344   .168   .060  8.3