Ba2 F18 Ni7 Renaudin J, Ferey G, Kozak A, Samouel M, Lacorre P Solid State Communications 65 (1988) 185-188 Crystal and magnetic structures of the ferrimagnet Ba2 Ni7 F18 _cod_database_code 1000249 _database_code_amcsd 0015455 6.924 7.218 7.437 94.39 93.20 115.82 P-1 atom x y z Ba1 .315 .697 .624 Ni1 0 0 .5 Ni2 .199 .884 .186 Ni3 .823 .618 .799 Ni4 .676 .718 .115 F1 .480 .565 .324 F2 .110 .762 .934 F3 .721 .986 .561 F4 .916 .712 .576 F5 .907 .878 .244 F6 .691 .811 .873 F7 .078 .606 .270 F8 .513 .924 .181 F9 .692 .497 .012