软锰矿
锰
X射线晶体学
衍射
材料科学
电化学
化学
晶体结构
晶体缺陷
结晶学
冶金
物理化学
物理
电极
光学
作者
Jimmy Hill,C. M. Freeman,Margaretha H. Rossouw
标识
DOI:10.1016/s0022-4596(03)00393-1
摘要
De Wolff disorder, microtwinning, and point defects which are characteristic for γ-MnO2 have been studied using molecular modeling. Particular attention was paid to the effects these defects have on the X-ray diffraction (XRD) pattern. Comparisons with observed XRD patterns allow identification of structural features in chemical (CMD) and electrochemical (EMD) manganese dioxide. The major factor determining the structure of γ-MnO2 is de Wolff disorder. CMD materials are characterized by a larger percentage of pyrolusite while EMD materials contain more ramsdellite. Microtwinning occurs to a larger extent in EMD than in CMD materials. EMD materials are also higher in energy.
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