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      Semiconducting Ge clathrates: Promising candidates for thermoelectric applications

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      Applied Physics Letters
      AIP Publishing

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          Lower limit to the thermal conductivity of disordered crystals

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            Thermal Conductivity of Silicon and Germanium from 3°K to the Melting Point

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              Clathrate Structure of Silicon Na8Si46 and NaxSi136 (x < 11).

              The crystal structure of two new cubic phases in the silicon-sodium system have been solved from their x-ray diffraction patterns. Both structures are of the clathrate type found for gas hydrates, consisting of tetrahedral networks which are combinations of pentagonal dodecahedra with 14-face polyhedra in one case and with 16-face polyhedra in the other case. There is strict correspondence between the silicon positions and the oxygen positions of the hydrate structures. For one compound, Na(8)Si(46), the centers of all polyhedra are occupied by sodium atoms. For the other compound, there occurs only partial occupancy of the polyhedral cages.
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                Author and article information

                Journal
                Applied Physics Letters
                Appl. Phys. Lett.
                AIP Publishing
                0003-6951
                1077-3118
                July 13 1998
                July 13 1998
                : 73
                : 2
                : 178-180
                Article
                10.1063/1.121747
                58e14e8d-cc65-4134-bd72-b7a2a90ad29f
                © 1998
                History

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