Synthesis and structural characterization of a new perovskite series derived from LaNiO3: La5Ni4MO15(M Mo, Te, W)

Abstract

The synthesis and crystal structure of the orthorhombic La₅Ni₄MO₁₅(M Mo, Te, W) compounds are reported. These compounds can be regarded as being derived from LaNiO₃ by substitution of 20% of Ni³⁺ by M⁶⁺ with the consequent reduction of some Ni³⁺ to Ni²⁺ Neutron, X-ray and electron diffraction data have established that these compounds are isostructural and have a distorted perovskite structure in which the cations placed in B sites are randomly distributed.