The title compound with an ordered monoclinic (pseudotetragonal) perovskite structure has been prepared. The lattice constants are a=5.5239(5), b=5.5253(4), c=7.8936(6) Å, β=90.16(1)°, and Z=2. The superstructure was found to be due to a layer-like ordering of Na+ and La3+ ions along alternate c-planes as well as a NaCl-type ordering of Mg2+ and W6+ ions in the octahedral sites. This new compound is the first example for the occurence of cation ordering in the A site. The origin of the superstructure was discussed.
No takes yet. Share an insight, caveat, or question.
Sekiya et al. (1984) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: