Resolving Composition and Structure of RE–Sb–O–C Natural Superlattice Phases (RE = La, Ho)

Abstract A family of rare earth antimonide oxycarbides have been prepared and structurally characterized. These superlattice phases are constructed from NaCl‐type RE Sb slabs sandwiched between RE –O–C layers. Depending on the carbon content and synthetic conditions, three different RE –Sb–O–C structures can be obtained. At lower temperatures, RE 9– δ Sb 5 (O,C) 5 phases are obtained for RE = La, Ho. These phases adopt a stuffed Sc 2 Sb‐type …