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Phase Equilibria in the La–Sr–Mn–O System

✍ Scribed by V.A. Cherepanov; L.Yu. Barkhatova; V.I. Voronin

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
295 KB
Volume
134
Category
Article
ISSN
0022-4596

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✦ Synopsis

Based on the results of X-ray diffraction analysis of quenched samples and coulometric titration measurements, the phase equilibria of the La-Sr-Mn-O system at 1100°°C were examined and are illustrated in the form of phase diagrams. Two types of solid solutions La 1؊x Sr x MnO 3؎y and (La 1؊x Sr x ) 2 MnO 4؎ were found to exist in the system. The homogeneity ranges of solid solutions depended on thermodynamic conditions (T, P O 2 , and composition of the system).

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Phase Equilibrium of the La–Ca–Mn–O Syst
Phase Equilibrium of the La–Ca–Mn–O System
✍ Y.X. Wang; Y. Du; R.W. Qin; B. Han; J. Du; J.H. Lin 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 188 KB

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, crystalliz