隧道结构中耦合的阳离子和电荷调制，Na(0.40(2))MnO(2)。
Coupled commensurate cation and charge modulation in the tunneled structure, Na(0.40(2))MnO(2).
机构信息
NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States.
出版信息
J Am Chem Soc. 2011 Sep 7;133(35):13950-6. doi: 10.1021/ja109707q. Epub 2011 Aug 12.
Na(0.40(2))MnO(2) belongs to a family of mixed Mn(3+) and Mn(4+) porous oxides that contains both octahedral and square pyramidal Mn-O units. Neutron and synchrotron radiation studies identify the presence of both sodium ordering (T(Na) ≈ 310 K) and Mn charge and orbital ordering. Below T(Na), the centrosymmetric Pbam structure adopts an (ab 4c) supercell of Pnnm symmetry that accommodates a coupled commensurate modulation down the c-axis channels of both Na position and occupancy with Mn valence.
Na(0.40(2))MnO(2) 属于一类混合 Mn(3+) 和 Mn(4+) 的多孔氧化物，其中包含八面体和四方锥 Mn-O 单元。中子和同步辐射研究确定了钠离子有序（T(Na) ≈ 310 K）和 Mn 电荷及轨道有序的存在。低于 T(Na)时，中心对称的 Pbam 结构采用 Pnnm 对称的 (ab 4c) 超胞，其中容纳了沿 c 轴通道的 Na 位置和占有率以及 Mn 价的耦合协调调制。
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