Nd1.8 Ni O3.72 Sr0.2 Medarde M, Rodriguez-Carvajal J, Vallet-Regi M, Gonzalez-Calbet J, Alonso J Physical Review B - Condensed Matter 49 (1994) 8591-8599 Crystal structure and microstructure of Nd1.8 Sr0.2 NiO3.72: a K2 Ni F4- type nickelate with monoclinic symmetry and ordered oxygen vacancies _cod_database_code 1006140 _database_code_amcsd 0015288 5.3578 5.4394 12.250 90 90 90.788 B2/n atom x y z occ Nd1 0 -.008 .3626 .9 Sr1 0 -.008 .3626 .1 Ni1 0 0 0 O1 .25 .25 -.011 .76 O2 .25 .25 .489 .94 O3 0 .053 .1781