| Abstract: | On the Electronic Structure of [Y9C4O]I8 The new [Y9C4O]I8 structure exhibits striking similarities with layered structures of the well-known rare-earth metal carbide halides [M2C]X2 and [M2C2]X2 (M = rare-earth metal, X = halide) which already have been studied concerning their electronic structures and conductivities. In contrast to the last compounds, [Y9C4O]I8 formally contains one extra electron. This electron appears to be delocalized in various metallic orbitals. The oxygen atoms which are located in the bent sections in the metal double layers as well as the halide double layers in the structure are considered to act as barriers for electronic mobility. Therefore a one-dimensional metallic conductivity is expected to be dominant. |
