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Phase Equilibrium of the La–Ca–Mn–O System

✍ Scribed by Y.X. Wang; Y. Du; R.W. Qin; B. Han; J. Du; J.H. Lin

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
188 KB
Volume
156
Category
Article
ISSN
0022-4596

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✦ Synopsis

Phase equilibrium of the La+Ca+Mn+O system at 9003C in atmosphere was examined and illustrated in the form of a phase diagram. La 1؊x Ca x MnO 3 forms a solid solution with two distinct perovskite structures (R3 c and Pnma). A new compound La 2 Ca 2 MnO 7 , identi5ed in the phase diagram, crystallizes in a rhombohedral structure (R3 ) with the lattice constants of a ‫؍‬ 5.62176(4), c ‫؍‬ 17.3161(2) A s . The phase regions in the La+Ca+Mn+O system were clari5ed based on the X-ray di4raction analysis of the samples.

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