Structural analysis of complex oxides Ln2MnTa1+xO7+δ (Ln = rare earth and yttrium) with pyrochlore-related structures

Synthesis, characterization and magnetic properties of complex oxides Ln2Mn2/3Re4/3O7 (Ln=Er, Y) and Y2Zn2/3Re4/3O7

“…These structures include complex oxides Ln 2 Mn 3+ BO 7 [4] such oxides were considered as rhombohedrally distorted pyrochlores [5,6]. In works [7][8][9][10], high-resolution electron spectroscopy, electron diffraction and X-ray structural analysis were used to show that these compounds may exist in two modifications: trigonal (space group P3 1 21, z = 6, zirkelite structure type) and monoclinic (space group C2/c, z = 8, structure type of zirconolite CaZrTi 2 O 7 ).…”

Structural, hyperfine and Raman properties of RE2FeSbO7 compounds

“…In these cases, the only magnetic sublattice is the one formed by the rare-earth cations, which form a structure of sharing corners tetrahedra. In a few cases, RE 2-M 2 O 7 pyrochlores were prepared with transition cations which could, plausibly, have magnetic moments [4,5].…”

Synthesis and structure investigation of ternary oxides based on molybdenum and lanthanum

“…In the presence of partial cation substitution the pattern can be complicated, especially when the ionic radii are significantly different. As a result of such distortions of the unit cell, pyrochlores with the trigonal [16,17], tetragonal [18e20], orthorhombic [21e24], and monoclinic system [25e29] can be formed.…”