Preparation and Electrical Properties of ( LaO ) AgS and ( LnO ) CuS ( Ln = La , Pr , or Nd )

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Abstract
A layered compound, , was obtained from and in a sulfur gas atmosphere at 843 K, and from and in vacuo at 853–1373 K. The ac, ionic, and electronic conductivities and the thermoelectromotive forces of the products were measured under a purified helium gas atmosphere at 300–573 K and at 77.4–700 K, respectiyely. The compound was an n‐type mixed ionic conductor, whereas and were an electronic p‐type semiconductor. A conduction mechanism was proposed for and .

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