![]() ![]() The calculated cell parameters of the dominant perovskite-type phase are reported in Table 1 for the three samples. In the case of LalMnl-973 two phases have been detected both with perovskite-type structure, one orthorombic and the other rombohedral. A perovskite type phase with hexagonal-rombohedral structure represents the main phase of LalCol-973, but traces of C03O4 and La2C05 are also present. ![]() XRD and skeletal FTIR/FTFIR data for LalCol, LalMnl and LalFel calcined at 973 K evidence that only LalFel-973 is actually monophasic and consists of a perovskite-type phase with orthorombic structure. In perovskite-type catalysts the formation of the final phase is completed already at 973 K. Joint Committee on Powder Diffraction Standards (JCPDS), Standard Powder Diffraction File, International Center for Diffraction Data, Swarthmore, PA. Faller, University of Berne, 1989, in JCPDS Database Coll. This index is available from JCPDS-International Centre for Diffraction Data, 1601 Park Lane Swarthmore, PA 19081. JCPDS-ICDD Elemental and Lattice Spacing Index ilDDO). SMA-29, JCPDS, International Centre for Diffraction Data, Swarthmore, Pa., 1979.
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