Citation: Ijjaali, I.; Ibers, J.A.; Bin Deng (2005). Seven new rare-earth transition-metal oxychalcogenides: Syntheses and characterization of Ln4 Mn O Se6 (Ln = La, Ce, Nd), Ln4 Fe O Se6 (Ln = La, Ce, Sm), and La4 Mn O S6. Journal of Solid State Chemistry, 178, pp. 1503-1507.