Russell Egdell - Academia.edu (original) (raw)

Papers by Russell Egdell

Research paper thumbnail of Anomalous enhancement of O 2p states near the Fermi level in the superconductor Bi2Sr2CaCu2O8-δ

Research paper thumbnail of Why is lead dioxide metallic?

Chemical Physics Letters, 2005

Research paper thumbnail of Henry Moseley, X-ray spectroscopy and the periodic table

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences

Just over 100 years ago, Henry Moseley carried out a systematic series of experiments which showe... more Just over 100 years ago, Henry Moseley carried out a systematic series of experiments which showed that the frequencies of the X-rays emitted from an elemental target under bombardment by cathode rays were characteristic of that element and could be used to identify the charge on its atomic nucleus. This led to a reorganization of the periodic table, with chemical elements now arranged on the basis of atomic number Z rather than atomic weight A, as had been the case in previous tables, including those developed by Mendeleev. Moseley also showed that there were four ‘missing elements’ before gold. With further measurements up to uranium Z = 92, the Swedish physicist Manne Siegbahn identified two more missing elements. This paper provides an introduction to Moseley and his experiments and then traces attempts to ‘discover’ missing elements by X-ray spectroscopy. There were two successes with hafnium (Z = 72) and rhenium (Z = 75), but many blind alleys and episodes of self-deception wh...

Research paper thumbnail of Photoelectron spectra of metal tetrahydroborates

Journal of the Chemical Society, Dalton Transactions, 1978

Research paper thumbnail of Structural and electronic investigations of In2O3 nanostructures and thin films grown by molecular beam epitaxy

Research paper thumbnail of Interaction of bromine with Ni(110) studied by scanning tunnelling microscopy

Research paper thumbnail of Identification of Lone Pair Surface States on Indium Oxide

The Journal of Physical Chemistry C

Research paper thumbnail of The sodium tungsten bronzes: a study of the changes in electronic structure with composition using high-resolution electron spectroscopy

Journal of Physics C: Solid State Physics

ABSTRACT

Research paper thumbnail of ChemInform Abstract: HELIUM I PHOTOELECTRON STUDIES OF C-NITROSO COMPOUNDS

Chemischer Informationsdienst

Research paper thumbnail of Oxygen Deficiency and V and Sb Doping in TiO<sub>2</sub> and SnO<sub>2</sub>: Influences on Surface Electronic Structure

Key Engineering Materials, 1995

Research paper thumbnail of On the Involvement of Shallow Core 5D Electrons in the Bonding in Hgo

Research paper thumbnail of A critical evaluation of the mode of incorporation of nitrogen in doped anatase photocatalysts

Physical Chemistry Chemical Physics 12 960 969, Jan 11, 2010

Research paper thumbnail of On the difference in valence electron plasmon energy and density of states between beta- and cubic-Si 3 N 4

Research paper thumbnail of High resolution X-ray photoemission of SrCu 2O 2

Chem Phys Lett, 2005

ABSTRACT

Research paper thumbnail of Photoemission and electron-energy-loss-spectroscopy study of BaRuO3

Research paper thumbnail of Electron mean free paths from quantitative X-ray photoelectron spectroscopic studies of a modified thionine electrode

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1984

ABSTRACT

Research paper thumbnail of Direct observation of sintering in a model oxide supported metal catalyst STM of Pd on WO3(001)

Journal of the Chemical Society, Faraday Transactions, 1998

... STM of Pd on WO 3 (001) Richard A. Dixon and Russell G. Egdell Inorganic Chemistry L aborator... more ... STM of Pd on WO 3 (001) Richard A. Dixon and Russell G. Egdell Inorganic Chemistry L aboratory, South Parks Road, Oxford, UK OX1 3QR ... 9 Th. Bertrams, F. Winkelmann, Th. Uttich, HJ Freund and H. Neddermeyer, Surf. Sci., 1995, 331–333, 1515. ...

Research paper thumbnail of The influence of relativistic effects on electronic energy levels in metal tetraiodides MI4 (M=Ti, Zr, Hf, Th)

Research paper thumbnail of Photoelectron Spectra of some Substituted Benzenes

Research paper thumbnail of Characterisation of bandgap states in V-doped TiO2 by high-resolution X-ray photoemission spectroscopy

Journal of the Chemical Society, Faraday Transactions, 1995

... X-ray photoemission to identify electronic states associated with dopants in oxide systems ev... more ... X-ray photoemission to identify electronic states associated with dopants in oxide systems even at dopant levels of the order of a few atom%. References 1 2 ... SOC., 1989,87, 65. G. Centi, D. Pinelli, F. Trifiro, D. Ghoussoub, M. Guelton and L. Gengembre, J. Catal., 1991, 130, 238. ...

Research paper thumbnail of Anomalous enhancement of O 2p states near the Fermi level in the superconductor Bi2Sr2CaCu2O8-δ

Research paper thumbnail of Why is lead dioxide metallic?

Chemical Physics Letters, 2005

Research paper thumbnail of Henry Moseley, X-ray spectroscopy and the periodic table

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences

Just over 100 years ago, Henry Moseley carried out a systematic series of experiments which showe... more Just over 100 years ago, Henry Moseley carried out a systematic series of experiments which showed that the frequencies of the X-rays emitted from an elemental target under bombardment by cathode rays were characteristic of that element and could be used to identify the charge on its atomic nucleus. This led to a reorganization of the periodic table, with chemical elements now arranged on the basis of atomic number Z rather than atomic weight A, as had been the case in previous tables, including those developed by Mendeleev. Moseley also showed that there were four ‘missing elements’ before gold. With further measurements up to uranium Z = 92, the Swedish physicist Manne Siegbahn identified two more missing elements. This paper provides an introduction to Moseley and his experiments and then traces attempts to ‘discover’ missing elements by X-ray spectroscopy. There were two successes with hafnium (Z = 72) and rhenium (Z = 75), but many blind alleys and episodes of self-deception wh...

Research paper thumbnail of Photoelectron spectra of metal tetrahydroborates

Journal of the Chemical Society, Dalton Transactions, 1978

Research paper thumbnail of Structural and electronic investigations of In2O3 nanostructures and thin films grown by molecular beam epitaxy

Research paper thumbnail of Interaction of bromine with Ni(110) studied by scanning tunnelling microscopy

Research paper thumbnail of Identification of Lone Pair Surface States on Indium Oxide

The Journal of Physical Chemistry C

Research paper thumbnail of The sodium tungsten bronzes: a study of the changes in electronic structure with composition using high-resolution electron spectroscopy

Journal of Physics C: Solid State Physics

ABSTRACT

Research paper thumbnail of ChemInform Abstract: HELIUM I PHOTOELECTRON STUDIES OF C-NITROSO COMPOUNDS

Chemischer Informationsdienst

Research paper thumbnail of Oxygen Deficiency and V and Sb Doping in TiO<sub>2</sub> and SnO<sub>2</sub>: Influences on Surface Electronic Structure

Key Engineering Materials, 1995

Research paper thumbnail of On the Involvement of Shallow Core 5D Electrons in the Bonding in Hgo

Research paper thumbnail of A critical evaluation of the mode of incorporation of nitrogen in doped anatase photocatalysts

Physical Chemistry Chemical Physics 12 960 969, Jan 11, 2010

Research paper thumbnail of On the difference in valence electron plasmon energy and density of states between beta- and cubic-Si 3 N 4

Research paper thumbnail of High resolution X-ray photoemission of SrCu 2O 2

Chem Phys Lett, 2005

ABSTRACT

Research paper thumbnail of Photoemission and electron-energy-loss-spectroscopy study of BaRuO3

Research paper thumbnail of Electron mean free paths from quantitative X-ray photoelectron spectroscopic studies of a modified thionine electrode

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1984

ABSTRACT

Research paper thumbnail of Direct observation of sintering in a model oxide supported metal catalyst STM of Pd on WO3(001)

Journal of the Chemical Society, Faraday Transactions, 1998

... STM of Pd on WO 3 (001) Richard A. Dixon and Russell G. Egdell Inorganic Chemistry L aborator... more ... STM of Pd on WO 3 (001) Richard A. Dixon and Russell G. Egdell Inorganic Chemistry L aboratory, South Parks Road, Oxford, UK OX1 3QR ... 9 Th. Bertrams, F. Winkelmann, Th. Uttich, HJ Freund and H. Neddermeyer, Surf. Sci., 1995, 331–333, 1515. ...

Research paper thumbnail of The influence of relativistic effects on electronic energy levels in metal tetraiodides MI4 (M=Ti, Zr, Hf, Th)

Research paper thumbnail of Photoelectron Spectra of some Substituted Benzenes

Research paper thumbnail of Characterisation of bandgap states in V-doped TiO2 by high-resolution X-ray photoemission spectroscopy

Journal of the Chemical Society, Faraday Transactions, 1995

... X-ray photoemission to identify electronic states associated with dopants in oxide systems ev... more ... X-ray photoemission to identify electronic states associated with dopants in oxide systems even at dopant levels of the order of a few atom%. References 1 2 ... SOC., 1989,87, 65. G. Centi, D. Pinelli, F. Trifiro, D. Ghoussoub, M. Guelton and L. Gengembre, J. Catal., 1991, 130, 238. ...

Research paper thumbnail of Henry Moseley, X-ray spectroscopy and the periodic table

Philosophical Transactions of the Royal Society A, 2020

Just over 100 years ago, Henry Moseley carried out a systematic series of experiments which showe... more Just over 100 years ago, Henry Moseley carried out a systematic series of experiments which showed that the frequencies of the X-rays emitted from an elemental target under bombardment by cathode rays

were characteristic of that element and could be used to identify the charge on its atomic nucleus. This led to a reorganization of the periodic table, with chemical elements now arranged on the basis of atomic number Z rather than atomic weight A, as had been the case in previous tables, including those developed by Mendeleev. Moseley also showed that there were four ‘missing elements’ before gold.

With further measurements up to uranium Z = 92, the Swedish physicist Manne Siegbahn identified two more missing elements. This paper provides an
introduction to Moseley and his experiments and then traces attempts to ‘discover’ missing elements by X-ray spectroscopy. There were two successes
with hafnium (Z = 72) and rhenium (Z = 75), but many blind alleys and episodes of self-deception when dealing with elements 43, 61, 85 and 87. These
all turned out to be radioactive, with extremely small natural abundances: all required synthesis by a nuclear reaction, with radiological characterization in the first instance. Finally, the paper moves on to consider the role of X-ray spectroscopy in exploring the periodic table beyond uranium. Although the discovery of artificial radioactive elements with Z > 92 again depended on nucleosynthesis and radiological characterization, measurement of the frequencies or energies of characteristic X-rays remains the ultimate goal in proving the existence of an element.

This article is part of the theme issue ‘Mendeleev and the periodic table’.