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X-ray photoelectron studies of Ca, Sr and Ba and their oxides and carbonates

1992; Elsevier BV; Volume: 59; Issue: 2 Linguagem: Inglês

10.1016/0368-2048(92)85002-o

1873-2526

M.I. Sosulnikov, Yu. A. Teterin,

X-ray Diffraction in Crystallography

X-ray photoelectron studies were carried out for bulk samples of the metals Ca, Sr and Ba, their oxides formed on the metal surfaces and their carbonates in the energy range 0–1000 eV. The dependence of oxygen O1s electron binding energy Eb (eV) on the inverse metal-oxygen distance (1/RM−0, nm−1) was found for the oxides MO (M = Mg, Ca, Sr, Ba) to be Eb(O1s) = 2.27/RM−0 + 519.4 eV, where Eb values are given relative to Eb(C1s) = 285.0 eV. It was shown that fine structure features, attributed to the "giant Coster-Kronig fluctuation", in the spectra of Ba4p electrons vary a little on going from the metal to the oxide and the carbonate. Sensitivity factors k which are needed for elemental quantitative analysis by the equation n1/n2 = (I1/I2)k were measured for the oxides and carbonates studied, where ni represents the element concentration and Ii represents the line intensity (i = 1, 2).