Resumo

GALDAMEZ, A; MANRIQUEZ, V; RUIZ, D  e  AVILA, R.E.. Physical Properties of the Phases A_0.7Bi_1.1P₂Se ₆ (A = Cu, Ag) and CuBi_1-XSb_XP₂Se ₆. J. Chil. Chem. Soc. [online]. 2005, vol.50, n.1, pp.413-416. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072005000100008.

The new selenophosphate phases A_0.7Bi_1.1P₂Se ₆ (A = Cu, Ag) and CuBi_1-XSb_XP₂Se ₆, stabilized by the chalcophosphate anions (P₂Se₆)^4-, were prepared by molten polythiophosphate fluxes. The reaction products were characterized by atomic absorption (ICP) and Scanning Electron Microscopy (SEM-EDX), powder X-ray (XRD), Fourier transform infrared spectroscopy (FTIR) and a.c. and d.c. electrical conductivity measurements. The phases A_0.7Bi_1.1P₂Se ₆ and CuBi_1-XSb_XP₂Se ₆ are structurally related to AMP₂Se₆ and they possess two-dimensional (2D) structure. These phases are semiconductors, with values of electrical conductivity, s_I, about 10^-4 W^-1cm^-1 at room temperature

Palavras-chave : selenodiphosphates; electrical properties.