The Rare Earths in Modern Science and Technology

The 13th Rare Earth Research Conference was held October 16- 19, 1977 in Wilson Lodge at Oglebay Park near Wheeling, West Vir­ g1n1a. From the small conference held originally at Lake Arrow­ head, California in 1960 the meetings have grown steadily in size and stature until they are now recognized as the premier conference devoted exclusively to the science and technology of rare earth systems. In keeping with the spirit which has prevailed since the Lake Arrowhead days a number of improvements were instituted on the oc­ casion of the 13th Conference. For the first time poster sessions were introduced, and they proved to be a splendid success. This was a year of another first - a review system for manuscripts. Dr. McCarthy, who undertood the arduous task of Program Chairman, and Dr. Rhyne, who along with Dr. McCarthy edited the conference proceedings, were mainly responsible for suggesting and implement­ ing these innovations. The layout at Wilson Lodge was nearly ideal for the conference in that poster and oral sessions were in very close proximity, facilitating the efforts of the attendees to make the most of the conference.

Applications to Hydrogen Storage and MHD Materials.- Prospects for the Use of Hydrogen as an Energy Carrier.- Performance Characteristics of the Hycsos Chemical Heat Pump System Based on Rare Earth Transition Metal AB5 Hydrides.- Hydrogen Absorption in Ternary Substituted AB5 Alloys with Particular Reference to La1-XYX Ni5 and LaNi5-xAlx Alloys.- Solar Furnace Experiments for Thermophysical Properties Studies of Rare-Earth Oxide MHD Materials.- Rare Earth Ceramics for MHD-Power Generators.- Influence of Composition and Cation Stoichiometry on the Volatility, Electrical Conductivity and Thermal Expansion of LaCrO3 Based Oxides.- Hydrides.- Sublattice Magnetization of ErFe2-H.- Low Temperature Magnetic Properties of the Hydrides and Deuterides of Er(Fe1-xMnx)2.- An Explanation for the Schottky-Like Anomaly in the Low Temperature Heat Capacity of Lu-H Alloys.- Magnetization Measurements on Er1-xThxFe3 and Some of Their Hydrides.- Catalysis.- Intermetallic Compounds as Catalysts for Hydrogenation of Carbon Oxides.- Methanation by Rare Earth Intermetallic Catalysts.- Chemiluminescence Induced by Catalysis: III. Luminescent Transitions of Europium Ions in a Thoria Matrix During the Catalysis of Carbon Monoxide Oxidation.- Bioinorganic and Coordination Chemistry.- Rare Earth Ion Probes of Metal Binding Sites on Yeast tRNAPhe.- Lanthanide Ions as Probes in Antibodies.- Laser-Induced Lanthanide Ion Luminescence as a Probe of Structure in Calcium Binding Proteins.- Steric Effects on Lanthanide Complexation Reactions in Mixed Solvents.- Lanthanide (III) and Actinide (III) Chelate Kinetics Via Solvent Extraction.- N,N,N?,N?-Tetramethylmalonamide (TMMA) Adducts of Lanthanide Hexafluorphosphates.- Erbium Chloride Complexation in Aqueous Dimethylsulfoxide.- Adducts of Lanthanide Iodides and Tetramethylene-Sulphoxide (TMSO).- Solid State Chemistry.- The Chemist’s Role in the Improvement of the Physical Properties of Rare-Earth Compounds. Some Examples Concerning Divalent Europium.- Phase Relationships and Crystal Chemistry of Compounds Containing Cerium Oxide.- Preparation and Crystal Chemistry of Some New Lanthanon Iron Borates.- Crystal Chemistry and Oxidation-Reduction of Phases in Rare Earth Tantalate-Niobate Systems.- Crystal Chemical Review of REMO3 Compounds (M = First Row Transition Metals).- Crystal Chemistry and Some Magnetic Properties of the Rare-Earth Titanium (III) Oxides, RTiO3, R = Gd, Dy, Ho, Er, Lu.- Preparation and Structure of Sodium Lanthanide Orthophosphates, Na3Ln(PO4)2.- High-Pressure Synthesis of Lanthanide/Boron and Actinide/ Boron Compounds.- Polyhedral Atomic Volumes and Generalized Coordination Numbers for the Rare Earth Chlorides and Bromides.- High Resolution Electron Microscopy of Polytypes in DyAl3.- Oxysulfides Formed by Lanthanum and a Second Cation: As, Sb, Bi; Ga, In; Ge, Sn.- Carbonation of Cerium Oxychloride.- Light Lanthanoid Partitioning in Rocks and Minerals Containing Rare Earths.- Vitreous Rare Earth Fluorozirconates.- Seal-Glass Compositions in the System Dy2O3-Al2O3-SiO2.- Single Crystal Growth from the Fluxed Melt of New Neodymium Doped Materials for Mini-Laser.- Use of Europium as a Probe in the Study of the Fe2+-Fe3+ Redox Equilibrium.- A Novel Terbium (IV) Hydroxy Iodate?.- The Rare Earth Carboxides.- Metallurgy.- The Effect of Oxygen and Hydrogen on the Transition and Melting Temperatures of Samarium.- Zone Refining of Rare Earth Metals.- Crystallographic Quality of RFe2 Crystals Containing Ho.- Single Crystals of Rare Earth Metals, Alloys and Intermetallic Compounds.- Phase Relations in the LaNi5-xCuX, LaNi5-xAlX and Related Systems.- Powder Metallurgical Processing of RFe2 Alloys.- Mischmetal in Steelmaking — Present and Future.- Nonmetallic and Intermetallic Phases Containing Rare Earths in Low Alloy Steels Treated with Mischmetal Alloys.- Solid State Physics.- Appearance-Potential Study of the 4f States of Dysprosium.- Ionization Cross Sections for Rare Earth Metals.- Low Temperature Heat Capacities of Rare Earth Sesquisulfides.- A Theoretical Method for the Determination of Electron and Positron Ranges in Rare Earth Metals.- An Analysis of Diffraction Data for Amorphous SmFe2 and TbFe2.- Magnetism.- Experiments on the Coexistence of Superconductivity and Long-Range Magnetic Order in Ternary Rare Earth Compounds.- Substitutional and Ordering Effects in the YCo5 Structure.- Neutron Diffraction of Y6Fe23 and Y6Mn23.- Effect of Rare Earth and Transition Metal Substitution on the Anisotropy of R2Co17 Compounds (R = Er, Tm, Yb).- The Magnetic Anisotropy of an Er2Fe17 Single Crystal.- Magnetization and Anisotropy of Some R2Co7 Phases at Low Temperature.- Magnetic Behavior of RCu4Al (R = Gd, Tb, Dy and Ho) Compounds.- Hyperfine Interactions in Oxygen Stabilized Rare-Earth Iron, R12Fe32O2 Compounds.- Magnetic Susceptibility of Cerium Tantalate Compounds.- Phonon and Magnon Resonances in GdFe2 Films.- The Curie Constant of Rare Earths.- Optical Properties of Solids.- Optical Properties of Rare Earth Metals.- Measurement of the 4f Electron Coulomb Repulsion Energy in GdSb, GdTe and EuO by Inelastic Electron Scattering and X-Ray Photoemission Spectroscopy.- Temperature Dependences of the Faraday Rotation and Cotton Mouton Effect in Dysprosium Iron Garnet.- High Optical Mode Conversions Induced by the Epitaxy Birefringence in Gd and Tb Substituted Garnet Films.- Actinides.- The First Preparation of an Einsteinium (II) Compound, EsCl2.- Absorption Spectrophotometric and X-Ray Diffraction Evidence for Mixed-Valence Compounds in Anhydrous Halides of Lanthanide-Actinide Mixtures.- Fluorescence and Excitation Spectra of Bk3+, Cf3+, and Es3+ Ions in Single Crystals of LaCl3.- Lasers, Fluorescence and f-f Absorption.- Predictions of the Laser Characteristics of Tm3+ in Phosphate, Borate, Germanate and Tellurite Glasses.- Rare Earth Vapor Laser Studies.- Stimulated Emission at 0.64 ?m in Trivalent Pr Doped LiYF4.- Observation of Magnetic-Dipole Transitions for Pr3+ in LiYF4.- Radiative and Non-Radiative Transition Probabilities for Eu3+ in KY3F10.- Spectra-Structure Relations in KY3F10 Isotypic Compounds Doped with Eu2+ or Eu3+.- Energy Transfers in Holmium and Yttrium Fluoride.- Spectroscopic Investigation of NaCl: Sm2+ Fluorescence — a Departure from the Norm.- Radiationless Processes in BaClF:Sm2+.- Flame Excited Luminescence and Radical Recombination Luminescence of Tb3+ and Eu3+ in Rare Earth Oxide Phosphors and Silicate Glasses.- Spectroscopy.- New Arguments for Atomic Character of the 4f Shell.- Photochemical Separation of Rare Earths in the Liquid Phase.- Direct Determination of Rare Earths from Mixed Aqueous Solution by Plasma Emission Spectroscopy.- Structural and Optical Properties of Lanthanum-Gallium Sulfides Glasses.- Vibrational Spectra of Rare Earth Thiospinels.- Optical Absorption of Cation and Anion Substituted Sm2S3.- Author Index.