Ba Er2 Ni O5 Alonso J, Amador J, Martinez J, Rasines I, Rodriguez-Carvajal J, Saez-Puche R Solid State Communications 76 (1990) 467-474 Neutron diffraction study of the magnetic structure of Er2BaNiO5 _cod_database_code 1006035 _database_code_amcsd 0015482 3.7464 5.7289 11.2741 90 90 90 Immm atom x y z Er1 0 0 .2027 Ba1 0 .5 0 Ni1 .5 0 0 O1 .5 .2397 .1486 O2 0 0 0