Co Nb2 O21 P6 Averbuch-Pouchot M, Durif A Zeitschrift fur Kristallographie 180 (1987) 195-202 Crystal data and structure of Nb2Co(P2O7)3 and Nb2Mg(P2O7)3 _cod_database_code 1007181 _database_code_amcsd 0010975 15.32 7.890 6.490 90 90.76 90 P2_1/n atom x y z Nb1 .16612 .0227 .4611 Co1 0 .5 0 P1 .1668 .3916 .7188 P2 .1607 .6035 .3437 P3 .0181 .8863 .8140 O1 .2589 .9226 .627 O2 .1943 .2426 .579 O3 .0809 .365 .811 O4 .1707 .5555 .579 O5 .3559 .2957 .150 O6 .2458 .076 .242 O7 .0934 .5029 .238 O8 .4162 .483 .813 O9 .4521 .220 .621 O10 .0688 .112 .304 O11 0 0 0