Nasonite
Giuseppetti G, Rossi G, Tadini C
American Mineralogist 56 (1971) 1174-1179
The crystal structure of nasonite
_database_code_amcsd 0000251
10.08 10.08 13.27 90 90 120 P6_3/m
atom      x      y      z Biso
Pb   .25801 .26493 .10862 1.44
Ca1     1/3    2/3  .9936  .98
Ca2     1/3    2/3    .25  .95
Ca3     2/3    1/3    .25  .77
Cl1       0      0    .25 2.14
Cl2       0      0      0 2.02
Si    .0259  .4198  .3644  .52
O1    .0710  .3291  .4444 2.11
O2    .8588  .3949  .6208 1.08
O3    .8545  .3748  .3725 1.71
O4    .0714  .3830    .25 1.38