期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 131, 期 44, 页码 16244-16247出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja906668c
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资金
- Global COE Program [19GS0207, 19014010, 19340098]
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan
- Grants-in-Aid for Scientific Research [19014010, 19340098] Funding Source: KAKEN
A-site-ordered perovskites LaMn3Cr4O12 and LaMn3Ti4O12 were synthesized under high-pressure and high-temperature conditions. The charge formula of LaMn3Cr4O12 was found to be LaMn3+3Cr43+O12 with Mn3+ at the square-coordinated A site. The valence of the A-site Mn ions in LaMn3Ti4O12 appeared to be less than +2, and the charge combination in this compound seemed to be LaMn31.67+Ti44+O12. Although the square-coordinated A site in A-site-ordered perovskites has been widely known to be occupied by Jahn-Teller active Mn3+, the present results show that the valence of Mn at the A site can vary from +3 to possible +1.67.
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