ISSN:
1572-8838
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Electrical Engineering, Measurement and Control Technology
Notes:
Abstract An examination of the literature has revealed that several of the properties of oxyhydroxides derived fromγ-MnO2 show a sharp change around the midpoint at MnO1.75. These include the lattice parameters, the activation energy for semiconduction, the magnetic susceptibility, the thermal behaviour and the electrical potential. Intermediate compounds have been observed by X-ray diffraction in the closely related systems ramsdellite/groutite and VO2/VOOH. It is suggested that for theγ-MnO2/δ-MnOOH system two solid solutions exist, one between MnO2 and MnO1.75 (e.g. Mn2O4H) and another between Mn2O4H and MnOOH. Ways in which the two solid solutions may arise involving different proton-electron filling mechanisms above and below the midpoint are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01112070
