Preparation and characterization of Bi<sub>26-2x</sub>Mn<sub>2x</sub>Mo<sub>10</sub>O<sub>69-d</sub> and Bi<sub>26.4</sub>Mn<sub>0.6</sub>Mo<sub>10-2y</sub>Me<sub>2y</sub>O<sub>69-d</sub> (Me = V, Fe) Solid Solutions
Chimica techno acta