Chopinite
Berthet G, Joubert J, Bertaut E
Zeitschrift fur Kristallographie 136 (1972) 98-105
Vacancies ordering in new metastable orthophosphates (Co3)P2O8
and (Mg3)P2O8 with olivine-related structure
_cod_database_code 1008830
_database_code_amcsd 0016699
5.911 10.214 4.734 90 90 90.99 P2_1/b
atom    x    y     z
Mg1    .5    0     0
Mg2  .263 .277 -.023
P1   .242 .103  .426
O1   .266 .079  .746
O2   .239 .453  .202
O3   .059 .190  .350
O4   .439 .145  .272