Influence of Sr-doping in Ba7Rh6O18, a new one-dimensional oxide of the homologous series (A3Rh2O6)alpha(A3Rh3O9)beta.
The synthesis and microstructural characterization, by means of selected-area electron diffraction and high-resolution electron microscopy, of Ba7Rh6O18 is reported. This material, isostructural to Ba7Co6O18, is formed by rows of one trigonal prism and five face-sharing octahedra running parallel to the c-axis of a trigonal unit cell with parameters a = 1.004(5) and c = 3.165(7) nm. The substitution of Sr by Ba is accommodated by means of twin formation due to a rearrangement of the rows of polyhedra.
Departamento de Química Inorgánica, Facultad de Químicas, Universidad Complutense, E-28040 Madrid, Spain.
María
M
Hernando
Khalid
K
Boulahya
Aurea
A
Varela
Marina
M
Parras
José M
JM
González-Calbet