Bultfonteinite McIver E J Acta Crystallographica 16 (1963) 551-558 The structure of bultfonteinite, Ca4Si2O10F2H6 Locality: Bultfontein mine, Kimberley, South Africa _database_code_amcsd 0009278 10.992 8.185 5.671 93.95 91.32 89.85 P-1 atom x y z Biso Ca1 .1331 .7938 .7834 .66 Ca2 .3695 .7942 .2873 .70 Ca3 .1204 .4759 .2495 .76 Ca4 .3829 .4791 .7448 .80 Si1 .4266 .2404 .2146 .50 Si2 .0701 .2397 .7325 .50 O1 .2797 .2678 .1841 .53 O2 .2192 .2708 .7593 .57 O3 .0162 .3280 .4955 .37 O4 .0018 .3152 .9597 .40 O5 .4935 .6830 .9870 .53 O6 .4795 .3190 .4575 .57 OH1 .0422 .0382 .7003 .40 OH2 .4580 .0369 .1963 .50 F1 .2512 .6186 .0250 .43 F2 .2478 .6253 .5061 .27 Wat1 .1935 .9564 .1642 .70 Wat2 .3094 .9579 .6488 .90