亚锰酸镧

亚锰酸镧是一种无机化合物，化学式为LaMnO₃，简写LMO。亚锰酸镧具有钙钛矿结构，由中心锰原子和氧八面體构成。立方晶系的钙钛矿结构由于受到氧八面体强烈的姜-泰勒效应，被扭曲为正交晶系的结构。^[1]

制备[编辑]

亚锰酸镧可由对应氧化物或碳酸盐的高温反应制备。^[2]

\mathrm {\ 2\ La_{2}O_{3}+4\ MnCO_{3}+O_{2}\longrightarrow 4\ LaMnO_{3}+\ 4\ CO_{2}}

\mathrm {La_{2}O_{3}+Mn_{2}O_{3}\longrightarrow \ 2\ LaMnO_{3}}

将硝酸镧和硝酸锰混合，蒸去溶剂后高温反应，也能得到亚锰酸镧。^[3]

^ S. Satpathy; et al. Electronic Structure of the Perovskite Oxides: La_1−xCa_xMnO₃. Physical Review Letters. 1996, 76: 960 [2019-01-07]. doi:10.1103/PhysRevLett.76.960. （原始内容存档于2017-06-10）.
^ Bockris, John O'M.; Otagawa, Takaaki. Mechanism of oxygen evolution on perovskites. The Journal of Physical Chemistry. 2002, 87 (15): 2960–2971. ISSN 0022-3654. doi:10.1021/j100238a048.
^ Liu, Yuxi; Dai, Hongxing; Du, Yucheng; Deng, Jiguang; Zhang, Lei; Zhao, Zhenxuan; Au, Chak Tong. Controlled preparation and high catalytic performance of three-dimensionally ordered macroporous LaMnO3 with nanovoid skeletons for the combustion of toluene. Journal of Catalysis. 2012, 287: 149–160. ISSN 0021-9517. doi:10.1016/j.jcat.2011.12.015.

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