Crystal Structure of New Compound of Platinum: PtLa6(La9,Sr3)(Pt0.9Сu0.1)4O42

Resumo

The crystal structure of new oxide PtLa₆(La₉Sr₃)(Pt_0.9Сu_0.1)₄O₄₂ is a three-dimensional framework, formed by chains of regular octahedra Pt1 and nine-vertex polyhedra La1, extended along coordinate axes. The framework is filled with regular oxygen octahedral, containing Pt2 atoms (Pt_0.9Сu_0.1) inside, and ten-vertex polyhedra La2 (La,Sr), located along diagonals. The Pt1О₆ octahedron shares vertices with only La1 polyhedra, while the other polyhedra share edges and faces. A framework of similar type was established in the LiFeLaO compound, which differs significantly by the composition and structure of chains of FeО₆ octahedra and La1 polyhedra. Previously similar chains of polyhedra and octahedra were found in Cu(La,Sr)₂O₄ and (Cu,Pt)(La,Sr)₂O₄ chain structures.