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Revised phase diagram and X‐ray data of The Mn 3 O 4 Al 2 O 3 System in air
Author(s) -
Dekker E. H. L. J.,
Rieck G. D.
Publication year - 1975
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19754150110
Subject(s) - tetragonal crystal system , phase diagram , manganese , diffraction , lattice constant , powder diffraction , materials science , crystallography , x ray crystallography , diagram , analytical chemistry (journal) , phase (matter) , mineralogy , crystal structure , chemistry , metallurgy , physics , optics , mathematics , organic chemistry , chromatography , statistics
The phase diagram of the quasi‐binary Mn 3 O 4 Al 2 O 3 system in air has been redetermined at temperatures from 850 to 1550°C with the help of the X‐ray powder diffraction technique including high‐temperature diffractometry. Lattice constants of manganese aluminates and the powder diffraction patterns of Mn 3 O 4 , MnAl 2 O 4 and Mn 2 AlO 4 are presented. The influence of specimen cooling on the cubic‐to‐tetragonal transition of MnAl spinels is demonstrated. The inversion degree of the spinal compounds is discussed.