Structure et proprietes physiques des phases Cu2TlX2, Cu3 YTl2X4 (AVEC X = Se,Te et Y = Fe,Ga, Al) |
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| Authors: | G. Brun B. Gardes J.C. Tedenac A. Raymond M. Maurin |
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| Affiliation: | Laboratoire de Chimie Minérale C, Chimie des Matériaux E.R.A. 314 U.S.T.L. Place E. Bataillon 34060 Montpellier Cédex France |
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| Abstract: | Ternary (Cu2TlX2) and quarternary (Cu3YTl2X4) compounds (with X = Se, Te and Y = Fe, Ga, Al) have been prepared and characterized. All of them have the same lamellar structure where tetrahedras (CuYX4)n and thallium atoms in coordination eight form successive layers. Some are metallic conductors (Cu2TlX2) whereas others are semi-conductors (Cu3YTlX4). The metallic behaviour could be due to thallium monovalent-thallium trivalent interactions within the layers. |
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