Letter | Published:

Cerium Tungstate as a Semi-Conductor

Nature volume 158, pages 753754 (23 November 1946) | Download Citation



BOTH Zambonini1 and Beintema2 claim to have prepared tetragonal bipyramidal crystals of cerium tungstate, Ce2 (WO4)3, by fusing a precipitate, using sodium chloride as a flux. Subsequent work by Sillen and Sundvall3 showed that the compound was actually NaCe(WO4)2 of scheelite-type structure. Tammann4 has also described a cerium tungstate, but the only observations made were on the change with temperature of electrical resistance of powdered compacts. The resistance of a pellet 1 mm. thick and 14 mm. diameter was given as 40,000 Ω at 600° C. and 1,700 Ω at 800° C.

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    , R. R. Accad. dei Lincei, 12, 519 (1913).

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    , Proc. Konin. Akad. Wetenschappen, Amsterdam, 38, 1 (1935).

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    , and , Arkiv. für Kemi., Min. Geol., 17A, No. 10 (1943).

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    , Z. anorg. Chemie, 119, 35 (1928).

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    , "Crystal Physics" (Camb. Univ. Press, 1938), 225.

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    , J. App. Phys., 16, 553 (1945).

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  1. British Coal Utilisation Research Association, 13 Grosvenor Gardens, S.W.1. Oct. 16.

    • J. B. NELSON
    •  & J. H. MCKEE


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