Two new iron(IV) oxides with high-spin configuration . SrLaMg0.50Fe0.50O4 and SrLaZn0.50Fe0.50O4</SBT>
Two new iron(IV) oxides have been prepared using high oxygen pressure: SrLa M0.50Fe(IV) 0.50O 4 ( M = Mg, Zn). In both phases with a K 2NiF 4-type-derived structure the elongation of the (FeO 6) octahedron is sufficient to stabilize a high-spin state ( t32 gd1z2). The electronic configuration has been characterized by structural, magnetic, and Mössbauer spectroscopic investigations.