Tilasite
Bladh K W, Corbett R K, McLean W J, Laughon R B
American Mineralogist 57 (1972) 1880-1884
The crystal structure of tilasite
_database_code_amcsd 0000298
6.688 8.944 7.570 90 121.17 90 Cc
atom     x     y     z Biso
As       0 .4293   .25  .42
Ca   .4867 .5817 .2392  .57
Mg    .252  .747    .5  .54
O1    .012  .311  .076   .7
O2    .263  .967  .626   .4
O3    .248  .537  .382   .7
O4    .001  .316  .422   .7
F     .508  .333  .247   .7