@article {4655,
	title = {Tensor LEED analysis for the Cu(111)-(root x root 7)R19.1 degrees-S surface structure},
	journal = {Surface Science},
	volume = {441},
	number = {2-3},
	year = {1999},
	note = {ISI Document Delivery No.: 253RWTimes Cited: 11Cited Reference Count: 36},
	month = {Nov},
	pages = {425-435},
	type = {Article},
	abstract = {A tensor LEED analysis is reported for the (root 7 x root 7)R19.1 degrees structure formed by S at the Cu(lll)surface. A new structural model is found which corresponds to a modified version of the copper sulphide overlayer model first proposed by Domange and Oudar. In that model, the topmost layer has 3/7 monolayer each of Cu and S atoms, but the modification involves one S atom per unit mesh moving down to displace a Cu atom from the second metal layer. Relaxations among the topmost Cu atoms result in one S atom being effectively three-fold coordinate while the other two are sixfold coordinate and 12-fold coordinate: the averaged S-Cu bond lengths are indicated to equal 2.19, 2.47 and 2.62 Angstrom respectively. Some discussion is included of factors that may influence this choice of surface structure. (C) 1999 Elsevier Science B.V. All rights reserved.},
	keywords = {ADSORPTION, chemisorption, copper, ENERGY-ELECTRON-DIFFRACTION, LAYERS, low energy electron diffraction, LOW INDEX SINGLE CRYSTAL, METAL-SURFACES, MOLECULE, RAY STANDING-WAVE, RECONSTRUCTION, RU(0001), SUBSTRATE, SULFUR, sulphur, SURFACE, surface reconstruction},
	isbn = {0039-6028},
	url = {<Go to ISI>://000083570400024},
	author = {Saidy, M. and Mitchell, K. A. R.}
}
@article {4061,
	title = {The structure of the Pd(111)-(root 7x root 7)R19.1 degrees-S surface: comparison with the corresponding P/Rh(111) surface},
	journal = {Surface Science},
	volume = {393},
	number = {1-3},
	year = {1997},
	note = {ISI Document Delivery No.: YP959Times Cited: 15Cited Reference Count: 35},
	month = {Dec},
	pages = {L119-L125},
	type = {Letter},
	abstract = {The structure of the Pd(lll)-(root 7 x root 7)R19.1<degrees-S surface has been determined by low-energy electron diffraction and has been shown to involve a reconstructed topmost metal layer based on a packed arrangement of Pd pentagons and triangles, with S atoms at 3/7 monolayer coverage occupying eight-coordinate sites at the centre of each Pd pentagon. Comparisons are made with the structure recently determined for the corresponding P/Rh(lll) system. In both cases, the atomic density in the reconstructed layer increases to five metal atoms and three chemisorbed atoms for every seven atoms in the regular metal surface. Some details are closely similar between the two systems, but an intriguing difference is also indicated. In S/Pd(lll), four metal atoms in each pentagonal ring appear close to hcp-type three-fold sites, while the other is close to a fee-type three-fold site. This contrasts with the situation for the topmost layer of the P/Rh(lll) system, for which the reversed lateral registry has been reported (i.e. the atoms of each pentagonal ring occupy three-fold sites where four are of the fee type and one of the hcp type). (C) 1997 Elsevier Science B.V.},
	keywords = {ADSORBATE STRUCTURE, ARRANGEMENT, chemisorption, CRYSTAL SURFACES, CRYSTALLOGRAPHY, ENERGY-ELECTRON-DIFFRACTION, LEED INTENSITY ANALYSIS, low energy electron diffraction crystallography, LOW INDEX SINGLE, METAL-SURFACES, palladium, PD(111) SURFACE, RECONSTRUCTION, SULFUR, sulphur, surface structure},
	isbn = {0039-6028},
	url = {<Go to ISI>://000071333200009},
	author = {Liu, W. and Mitchell, K. A. R. and Berndt, W.}
}
