Citation: Medarde, M.; Rodriguez-Carvajal, J. (1997). Oxygen vacancy ordering in La~2-x~Sr~x~NiO~4-\d~ (0 <= x <= 0.5): the crystal structure and defects investigated by neutron diffraction. Zeitschrift f\"ur Physik B: Condensed Matter, 102, pp. 307-315.
Formula: La1.75 Ni O2.212 Sr0.25
Chemical name:Lanthanum strontium nickel oxide (1.75/0.25/1/2.2)