SYNTHESIS OF Pb2Fe2O5 BY THERMAL DECOMPOSITION OF Pb2[Fe(CN)6].4H2O

DIEGO MAURICIO GIL; RAÚL ERNESTO CARBONIO; MARÍA INÉS GÓMEZ

JOURNAL OF THE CHILEAN CHEMICAL SOCIETY

SOC CHILENA QUIMICA

Año: 2010 vol. 55 p. 189 - 192

0717-9324

In the present work the synthesis, thermal analysis and structural characterization of Pb2[Fe(CN)6].4H2O are described in orderto obtain mixed oxides with technological properties. The starting materials and the decomposition products were characterized by IR spectroscopy, powder X-ray diffraction (XRDP) and scanning electron microscopy (SEM). The crystal structure of Pb2[Fe(CN)6].4H2O has been refined by Rietveld analysis using X- ray powder diffraction data. It Crystallizes in the monoclinic system with space group P21/m and the cell unit parameters are a = 10.9755(2)Å, b = 7.6285(1)Å, c = 8.5696(1) Å y ß = 98.8375(9)°. Pb2Fe2O5 has been obtained by a simple method, the thermal decomposition of Pb2[Fe(CN)6].4H2O at 700 °C in air. Pb2Fe2O5 crystallizes in the tetragonal system with cell unit parameters a = b = 7.80 A, c = 15.82 A. PbO is also obtained.