Abstract
AbstractThe structure and different electronic properties of K0.9Mo6O17 are well known. Up to now, a charge density wave instability is associated with the metal‐metal transition observed at 120 K. It is shown that the distortion can be associated with a two‐dimensional deformation structure. The atoms move, especially the Mo atoms of the layers situated in the middle of the molybdenum‐oxygen slab of composition Mo6O17. The structural rearrangement, originating from a single physical phenomenon, namely the reestablishment of the balance of electrostatic charges when the slab contracts with decreasing temperature, is supported by the observation of the relative intensities of the superlattice reflections in electron diffraction. It is in agreement with the temperature dependence of the conductivity. The relationships between effects and causes of the transition are discussed in the earlier and the new interpretation.
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