Zur Darstellung und Struktur einer neuen FeNbO4-Modifikation.

Abstract

Three different polymorphs of FeNbO4 were prepared by chemical transport. One of them is a new modification, which crystallisizes in the GaNbO4-type, monoclinic, space group C2, a = 12.52 Å; b= 3.83 Å; c = 6.67 A; β = 107.5°. The detailed structure, composed of 2 x 2 ‘blocks’ of corner shared metal-oxygen octahedra, was investigated by electron-diffraction and two-dimensional high resolution electron microscopy.