Determination of the oxidation state of manganese in lepidolite by X-ray photoelectron spectroscopy
- 1 December 1982
- journal article
- Published by Mineralogical Society in Clay Minerals
- Vol. 17 (4), 477-481
- https://doi.org/10.1180/claymin.1982.017.4.11
Abstract
It is usually assumed that the oxidation state of the small proportion of Mn sometimes present in micas is +2, although there is evidence from electronic spectroscopy (Burns, 1970) for at least the occasional occurrence of Mn(III) in manganophyllite. We describe here X-ray photoelectron spectroscopic (XPS) measurements on the Mn in a Norwegian lepidolite which was the subject of a concurrent structural study by X-ray photoelectron diffraction (Evans & Raftery, 1982). To establish the Mn oxidation state we have compared the Mn2p core-electron binding energies (BE), the Mn2P3/2-O ls BE differences, and the Mn2p XPS peak profiles from the four common oxides of manganese (MnO, Mn3O4, Mn2O3 and MnO2) with those from the lepidolite. A re-examination of these oxides was undertaken because the agreement between reports in the literature was unsatisfactory, and uncertainty existed concerning the integrity of some of the surfaces previously examined.Keywords
This publication has 16 references indexed in Scilit:
- X-ray photoelectron diffraction studies of lepidoliteClay Minerals, 1982
- Interfacing AEI/Kratos electron spectrometers to a microcomputer for data acquisition and processingSurface and Interface Analysis, 1982
- Chemisorption and the initial stage of oxidation on MnSurface Science Letters, 1981
- X-ray photoelectron studies of titanium in biotite and phlogopiteClay Minerals, 1980
- Use of the oxygen KLL Auger lines in identification of surface chemical states by electron spectroscopy for chemical analysisAnalytical Chemistry, 1980
- Study of transition metal oxides by photoelectron spectroscopyProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1979
- Escape depths of X-ray (MgKα)-induced photoelectrons and relative photoionization cross sections for the 3p subshell of the elements of the first long periodJournal of Physics C: Solid State Physics, 1977
- Determination of atomic partial charges using X-ray photoelectron spectroscopy: application to crystalline solidsJournal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics, 1975
- Systematics of Core-Electron Exchange Splitting in-Group Transition-Metal CompoundsPhysical Review B, 1973
- Solid Oxides and Hydroxides of Manganese1Journal of the American Chemical Society, 1950