Cubic ↔ Orthorhombic Transition in the Stoichiometric Spinel LiMn2 O 4
Cubic ↔ Orthorhombic Transition in the Stoichiometric Spinel LiMn2 O 4
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化学计量尖晶石 LiMn2 O 4 中的立方 ↔ 斜方转变
DOI：
10.1149/1.1390716
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发表时间：
1999
影响因子：
--
通讯作者：
M. Hervieu
中科院分区：
文献类型：
--
作者：
G. Rouse;C. Masquelier;J. Rodríguez;M. Hervieu
化学计量尖晶石LiMn2O4在接近室温时经历了从立方对称到正交对称的转变。差示扫描量热和电导率实验表明，该相变发生在290 (3)K时，加热时的滞后为~ 13 K。这种转变使得LiMn2O4在室温下根据其热历史的不同，采取立方或正交形式。在350k下记录的中子衍射数据的Rietveld细化证实了立方对称性（Fd3）
The stoichiometric spinel LiMn2O4 undergoes a transition from cubic to orthorhombic symmetry close to room temperature. Differential scanning calorimetry and conductivity experiments show that the transition takes place at 290 (3) K upon cooling with a hysteresis of~ 13 K during heating. This transition makes LiMn2O4 adopt either the cubic or orthorhombic form at room temperature, depending on its thermal history. Rietveld refinements of neutron diffraction data recorded at 350 K confirm the cubic symmetry (Fd3