I Techniques.- I. 1 Theory.- Resolution in Scanning Tunneling Microscopy.- Tunneling Current Between Two Nonplanar Surfaces.- Tensor LEED; New Prospects for Surface Structure Determination by LEED.- Comparison of the Quasidynamical and Tensor LEED Approximation for LEED Intensity Spectra from a Reconstructed Surface.- Surface Barrier Bound State Energies from Elastic Electron Scattering.- The Theory of SEELFS from Adsorbates.- Multiple-Scattering Studies of Normal and Off-Normal Photoelectron Diffraction of C(2×2)S-Ni(001).- I. 2 Experiment.- High Resolution Profile Imaging of Reconstructed Gold Surfaces.- Low Energy Electron Microscopy (LEEM).- Surface Structure Analysis by Scanning LEED Microscopy.- Structural Information from Stimulated Desorption: A Critical Assessment.- Comparative Study of Graphite and Intercalated Graphite by Tunneling Microscopy.- Auger Neutralization Lifetimes for Low-Energy Ne+ Ions Scattered from Pt(111) Surfaces.- Determination of Surface Structure from the Observation of Catastrophes.- II Clean Metals.- II. 1 Relaxation and Reconstruction.- Surface Structures from LEED: Metal Surfaces and Metastable Phases.- Electrostatic Models of Relaxation on Metal Surfaces.- Asymptotic Behavior of Relaxation and Reconstruction Near Crystalline Surfaces: Application to V(100) and Al(331) Surfaces.- Ion Channeling and Blocking Investigations of the Structure of Ideal and Reconstructed Metal Surfaces.- Reconstruction of fcc(110) Surfaces.- Calculations of Structural Phases of Transition Metal Surfaces Using the Embedded Atom Method.- The (111) Surface Reconstruction of Gold in the Glue Model.- Second Layer Displacements in the Clean Reconstructed W(100) Surface.- Calculation of Ni(100) Vibrational Properties Using the Matching Procedure.- II. 2 Alloys.- LEED Study of the Structure of the Pt3Ti(510) Stepped Single Crystal Surface.- Atomic Structure of Three Low-Index Surfaces of the Ordered Binary Alloy NiAl.- Structure, Electronic Properties and Dynamics of the NiAl(110) Surface.- Multilayer Segregation on Pt-Ni(111), (100) and (110): Influence of the Variation of Pair Interactions at the Surface.- III Adsorbates on Metals.- Surface EXAFS on Low-Z Elements.- An Application of SEXAFS to Sub-Monolayer Complexes on Polycrystalline Surfaces.- X-Ray Absorption Fine Structure Study of Mercaptide on Cu(111).- Adsorption Position of Deuterium on the Pd(100) and Ni(111) Surface Determined by Transmission Channeling.- Adsorption of Hydrogen on Rhodium (110).- Relaxation and Reconstruction on Ni(110) and Pd(110) Induced by Adsorbed Hydrogen.- EELFS Determination of Interatomic Distances in Adsorbed Monolayers.- The Structures of CO, NO and Benzene on Various Transition Metal Surfaces: Overview of LEED and HREELS Results.- Formation and Stability of a Metastable c(2×4)O Structure on an Unreconstructed Ni(110) Surface.- Surface Structures Determined by Kinetic Processes: Adsorption and Diffusion of Oxygen on Pd(100).- Mercury Adsorption on Ni(111).- Ion Scattering Study of the W(001)-(5×1)-C Surface.- Structural Determination of Oxygen Chemisorption-Site Geometry on W(211) by Low-Energy He+ ISS.- Structure of Oxygen on Ni3Al(110).- Early Stages of Ni(110) Oxidation — An STM Study.- Symmetry Rules in Chemisorption.- The Electronic Structure of Adsorbed Oxygen on Ag(110).- IV Clean Semiconductors.- Understanding the Si 7×7: Energetics, Topology, and Stress.- Scanning Tunneling Microscopy of Semiconductor Surfaces and Interfaces.- Surface X-Ray Diffraction: the Ge(001)2×1 Reconstruction and Surface Relaxation.- RHEED Intensity Analysis on a Single Domain Si(100)-2×1.- Surface Electronic Structure of Si(100)2×1 Studied with Angle-Resolved Photoemission.- Screened Coulomb Interaction at Semiconductor Surfaces: The Contribution of Surface States.- On the Reconstruction of the Diamond (111) Surface.- Charge Self-Consistent Empirical Tight Binding Cluster Method for Semiconductor Surface Structures.- Two New Models for the As-Stabilized GaAs ($$ \overline {111} $$)-(2×2) Surface.- V Adsorbates on Semiconductors.- High Sensitivity Detection of a Few Atomic Layers of Adsorbate by RHEED-TRAXS (Total Reflection Angle X-Ray Spectroscopy).- Submonolayers of Lead on Silicon (111) Surfaces: An X-Ray Standing Wave Analysis.- Atomic Geometry of the Si(111)?3 × ?3-Sn Surface by X-ray Photoelectron and Auger Electron Diffraction.- Surface X-Ray Diffraction: The Atomic Geometry of the Ge(111)7×7-Sn and Ge(111)5×5-Sn Reconstructions.- Chemisorption Geometry of Molybdenum on Silicon Surfaces.- Si(100) Surface Reordering upon Ga Adsorption.- Synchrotron Radiation Study of the Au-Si(100) Interface.- Studies of the High Temperature Nitridation Structures of the Si(111) Surface by LEED, AES and EELFS.- Hydrogen Bonding onto Microcrystalline Surfaces within Anodized Porous Silicon Crystals Studied by Infrared Spectroscopy.- The Oxygen Coverage on Diamond Surfaces.- H-Induced Reconstruction at the (110) Faces of GaAs and InP.- Indiffusion and Chemisorption of B, C, and N on GaAs and InP.- Structure of Platinum Metal Clusters Deposited on the TiO2 Surface by X-Ray Photoelectron Diffraction (XPED).- VI Epitaxy.- Strained Layer Epitaxy.- Critical Misfits for Lattice-Matched Strained Monolayers.- Interface Pseudomorphism Detected by Mössbauer Spectroscopy.- The Study of Epitaxy with Spot Profile Analysis of LEED (SPA-LEED).- Epitaxial Growth Studied by Surface X-Ray Diffraction.- The Epitaxial Growth of Nickel on Cu(100) Studied by Ion Channeling.- Structure and Ferromagnetism of Thin Magnetic Layers.- VII Phase Transitions.- VII. 1 Transitions in Two Dimensions.- Temperature-Dependent Dynamics of a Displacively Reconstructed Surface: W(001).- Surface Core Level Shifts for the Clean-Surface and Hydrogen-Induced Phase Transitions on W(100).- Theory of Phase Transitions on H/W(110) and H/Mo(110) Systems.- Critical Phenomena of Surface Phase Transitions: Theoretical Studies of the Structure Factor.- Order-Disorder Critical Behaviour in the System Oxygen on Ru(001).- Structure and Phase Transitions of Incommensurate Xe Layers on Pt(111).- The Temperature Dependence of the Near Order Structure of Au(110) Studied by Ion Scattering Spectrometry (ISS).- High Resolution He-Scattering Studies of Physisorbed Films.- VII. 2 Roughening.- The Step Roughening of the Cu(113) Surface: A Grazing Incidence X-Ray Scattering Study.- Roughening on (11m) Metal Surfaces.- Determination of the Kink Formation Energy and Step-Step Interaction Energy for Vicinal Copper Faces by Thermal Roughening Studies.- The Phase Diagram of Vicinal Si(111) Surfaces Misoriented Toward the [110] Direction.- Atom Scattering from a Markovian bcc(001) Surface.- VII. 3 Surface Melting.- Theory of Surface Melting and Non-Melting.- Experimental Investigations of Surface Melting.- Mean-Field Theory of Surface Melting.- Mobility of the Surface Melted Layer of CH4 Thin Films.- Diffraction Studies of Langmuir Films.- VIII Defects, Disorder and Morphology.- Simulation of Substitution Disorder Within Chemisorbed Monolayers.- Ordered Dimer Structures and Defects on Si(001) Studied by High Resolution Helium Atom Scattering.- Structure of the CaF2(111) Surface and Its Change with Electron Bombardment Studied by Impact Collision Ion Scattering Spectroscopy (ICISS).- Electron-Beam-Induced Surface Reduction in Transition-Metal Oxides.- Surface Structure of Metallic Glasses Studied by Scanning Tunneling Microscopy.- The Surface and Near Surface Structure of Metal-Metalloid Glasses.- Calculation of Diffracted Laser Beam Intensities from Non-Sinusoidal Periodic Surface Profiles Extending in the [001]-Direction on Pt(110).- Structural Changes on Ni Surfaces Induced by Catalytic CO Hydrogenation.- Surface Generation of Rayleigh Waves by Picosecond Laser Pulses.- Index of Contributors.