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Phase Chemistry in the Ca‐Mn‐Sb‐O System at 1160–1250 °C
Author(s) -
Bazuev Gennady V.,
Tyutyunnik Aleksander P.,
Golovkin Boris G.
Publication year - 2013
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.201300269
Subject(s) - orthorhombic crystal system , solid solution , manganese , monoclinic crystal system , phase diagram , chemistry , crystallography , valence (chemistry) , perovskite (structure) , crystal structure , phase (matter) , inorganic chemistry , organic chemistry
Phase equilibrium in the Ca‐Mn‐Sb‐O system was studied in air at the temperature range from 1160 to 1250 °C and a pseudo‐quaternary phase diagram for the system CaO‐MnO‐Mn 2 O 3 ‐Sb 2 O 5 is presented. The following compounds were discovered: new antimonate Ca 7 Sb 2 O 12 with a perovskite‐like structure, solid solutions Mn 2– x Ca x Sb 2 O 7 (0 ≤ x ≤ 1.6) with a 3 T ‐weberite structure, and Ca 2– x Mn x Sb 2 O 7 (0 ≤ x ≤ 0.23) with a 2 O ‐weberite structure, as well as solid solutions Ca 2 Mn 1+ x Sb 1– x O 6 with monoclinic (0 ≤ x ≤ 0.67) and orthorhombic (0.75 ≤ x ≤ 1) perovskite structures. The existence of a number of double and ternary oxides and solid solutions on the basis of Sb 5+ and Mn 2+ , Mn 3+ , Mn 4+ and with mixed manganese valence is confirmed.