Incommensurate structures and physical properties of antimony, bismuth and lanthanum misfit layer compounds.

Already before the discovery that crystals diffract X-rays, the morphology of crystals was explained with the three-dimensional (3D) repetition of a smallest unit. After this discovery (1912) the difraction pattern could be explained with 3D periodicity and crystal structures were determined on basis of a unit cell and a space group. However, it was also known that the morphology of some crystals did not obey the laws for 3D periodicity. ...

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Summary

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