La1.75 Ni O2.212 Sr0.25 Medarde M, Rodriguez-Carvajal J Zeitschrift fur Physik B102 (1997) 307-315 Oxygen vacancy ordering in La(2-x) Sr(x) Ni O(4-delta) (0 <= x <=0.5): the crystal structure and defects investigated by neutron diffraction _cod_database_code 1006137 _database_code_amcsd 0015865 3.7797 3.8549 12.657 90 90 90 Immm atom x y z occ La1 0 0 .3623 .875 Sr1 0 0 .3623 .125 Ni1 0 0 0 O1 .5 0 0 .086 O2 0 .5 0 .123 O3 0 0 .1733