Influence of Alkaline-Earth-Metal Substitutions on the Bismuth Ruthenate Structure: BiA'RuOO' (A' = Mg, Ca, Sr).

Solid solutions with the formula of BiA'RuO (A' = Mg, Ca, Sr; 0 ≤ ≤ 0.2 for Mg, 0 ≤ ≤ 1 for Ca, and 0 ≤ ≤ 0.5 for Sr) have been synthesized and characterized.

Os Instability in the Pyrochlore Structure: TlBiOsO.

Osmium-containing oxides are rare due to the difficulty in stabilizing complex structures with a fixed stoichiometry and metastability of the phases. Bismuth-substituted thallium osmate pyrochlore samples, TlBiOsO, were synthesized using solid-state reactions where the solubility limit was found to be approximately = 1.4.