Dr. John Rumble has long been a leader in developing and providing access to databases in numerous S&T disciplines. From 1980 through 2004, he worked in the NIST Standard Reference Data Program and later was responsible for NIST measurement services programs. From 2004 to 2011, He was Executive Vice President of Information International Associates in Oak Ridge, Tennessee. Today he is President of R&R Data Services in Gaithersburg MD.

Rumble has served on numerous national and international STI policy committees and review panels and was a member of the Board on International Scientific Organizations of the National Academy of Sciences.

Dr. Rumble was among the first to build online, PC, and Internet/web-based factual databases for scientific and technical (S&T) data. While at NIST, he sponsored data projects with scientists in China, Japan, England, France, Germany, and Russia. During that time, he also worked with many industry organizations and professional societies to develop industry-related data programs in materials science and chemistry, as well as standards for S&T data exchange.

Dr. Rumble has considerable experience in chemistry, physics, materials science, nanomaterials, and informatics and data science experience and has published widely in all these areas. Rumble received a Ph.D. in Chemical Physics from Indiana University.

In 1998-2002, Rumble served as President of CODATA, the ICSU Committee on Data for Science and Technology. Dr. Rumble is Fellow of IUPAC, AAAS, APS, ASTM International, ASM International, and IAFoST, as well as a Foreign Member of the Russian Academy of Metrology. He was awarded the CODATA 2006 Prize for outstanding achievements in S&T data. He has served two terms as Editor-in-Chief of the CODATA Data Science Journal.

During the last five years, Dr. Rumble has led a multi-disciplinary effort to develop a uniform system for describing nanomaterials. This work has been done under the auspices of CODATA International and the International Council for Science. Rumble has put together a unique group of international union representatives from the diverse scientific and technical fields interested in nanotechnology, including chemistry, physics, materials science, food science and technology, nutrition science, toxicology, and more. In addition, he has reached out to more general audiences in these fields through international workshops, symposia at union conferences, and liaisons with U.S. and European Nanosafety projects. This work is available at [...]

Introduction

The Editor and Editorial Board

Preface

New Data and Updates in the 104th Edition

On the Evaluation of Chemistry and Physics Data

Current Contributors

Part 1 Data on Chemical Substances

Section 1: Elements and Their Isotopes

Introduction

The Elements

Standard Atomic Weights

Atomic Masses and Isotopic Abundances

Abundance of Elements in the Earth's Crust and in the Sea

Melting, Boiling, Triple, and Critical Points and Densities of the Elements

Heat Capacity of the Elements at 25 °C

Table of the Isotopes

Phase Transitions in the Solid Elements at Atmospheric Pressure

Crystal Structures and Lattice Parameters of Allotropes of the Elements

Density of Molten Elements as a Function of Temperature

Physical Properties of the Rare-Earth Metals

Thermal and Physical Properties of Pure Elemental Metals

Electrical Resistivity of Pure Elemental Metals

Electron Work Function of the Elements

Magnetic Susceptibility of the Elements

Optical Properties of Selected Elements

Index of Refraction of Liquid Elements

Vapor Pressure of the Metallic Elements - Equations

Vapor Pressure of the Metallic Elements - Data

Section 2: Atomic Structure and Spectroscopy Data

Introduction

Electron Configuration and Ionization Energy of Neutral Atoms in the Ground State

Ionization Energies of Atoms and Atomic Ions

Electron Affinities of the Atomic Elements

Persistent Lines of the Neutral Atomic Elements

Atomic Transition Probabilities

Atomic Radii of the Elements

Polarizabilities of the Atomic Elements

Section 3: Properties of Organic Compounds

Introduction

Physical Constants of Organic Compounds

CAS Registry Number Index of Organic Compounds

Diamagnetic Susceptibility of Selected Organic Compounds

Critical Constants of Organic Compounds

Dissociation Constants of Organic Acids and Bases

Miscibility of Organic Solvents

Dependence of Boiling Point of Organic Liquids on Pressure

Bond Lengths in Crystalline Organic Compounds

Bond Lengths in Organometallic Compounds

Perfluoro- and Polyfluoroalkyl Substances New (Doa)

Section 4: Properties of Inorganic Compounds

Introduction

Physical Constants of Inorganic Compounds

CAS Registry Number Index of Inorganic Compounds

Critical Constants of Inorganic Compounds

Permittivity (Dielectric Constant) of Inorganic Solids

Density of Molten Inorganic Salts as a Function of Temperature

Dissociation Constants of Inorganic Acids and Bases

Index of Refraction of Inorganic Liquids

Index of Refraction of Inorganic Crystals

Magnetic Susceptibility of Selected Inorganic Compounds

Optical Properties of Selected Inorganic Solids and Teflon

Phase Transitions of Metal Carbides New (Burgess)

Aqueous Solubility of Inorganic Compounds as a Function of Temperature

Solubility Product Constants of Inorganic Salts

Solubility Chart for Inorganic Salts

Solubility of Common Inorganic Salts as a Function of Temperature

Properties of Gas Clathrate Hydrates

Physical and Optical Properties of Minerals

Crystallographic Data on Minerals

Section 5: Properties of Water

Introduction

Thermophysical Properties of Water and Steam

Fixed-Point Thermophysical Properties of H2O and D2O

Properties of Saturated Liquid D2O

Vapor Pressure and Other Saturation Properties of Water

Standard Density of Water as a Function of Temperature

Ionization Constant of Water as a Function of Temperature and Pressure

Ionization Constant of Normal and Heavy Water at Saturated Vapor Pressure

Electrical Conductivity of Water

Permittivity (Dielectric Constant) of Water at Various Frequencies

Properties of Ice and Supercooled Water

Vapor Pressure of Ice

Melting Point of Ice as a Function of Pressure Document (title changed)

Index of Refraction of Water

Section 6: Properties of Polymers

Introduction

Abbreviations Used in Polymer Science and Technology

Physical Properties of Selected Polymers

Solvents for Common Polymers

Glass Transition Temperatures for Selected Polymers

Dielectric Constant of Selected Polymers

Pressure-Volume-Temperature Relationships for Polymer Melts

Vapor Pressures (Solvent Activities) for Binary Polymer Solutions

Solubility Parameters of Selected Polymers

Section 7: Properties of Bio-Medical Compounds and Substances

Introduction

Properties of Amino Acids

Structures of Common Amino Acids

Properties of Purine and Pyrimidine Bases

The Genetic Code

Properties of Fatty Acids and Their Methyl Esters

Composition and Properties of Common Oils and Fats

Carbohydrate Names and Symbols

Standard Transformed Gibbs Energies of Formation for Biochemical Reactants

Apparent Equilibrium Constants for Enzyme-Catalyzed Reactions

Apparent Equilibrium Thermodynamics of Protein-Ligand Binding Reactions

Thermodynamic Quantities for the Ionization Reactions of Buffers in Water

Biological Buffers

Typical pH Values of Biological Materials and Foods

Properties and Functions of Common Drugs

Properties of Controlled Substances

Section 8: Chemical Structure, Bonding, and Molecular Spectroscopy Data

Introduction

Structure of Free Molecules in the Gas Phase

Characteristic Bond Lengths in Free Molecules

Dipole Moments

Hindered Internal Rotation

Bond Dissociation Energies

Electronegativity

Force Constants for Bond Stretching

Fundamental Vibrational Frequencies of Small Molecules

Spectroscopic Constants of Diatomic Molecules

Polarizabilities of Molecules

Ionization Energies of Gas-Phase Molecules

Electron Affinities of Molecules

Part 2 Data for the Practice of Chemistry and Physics

Section 9: Physical Chemistry Data

Introduction

CODATA Key Values for Thermodynamics

Standard Thermodynamic Properties of Chemical Substances

Thermodynamic Properties as a Function of Temperature

Thermodynamic Properties of Aqueous Ions

Proton Affinities

Heat of Combustion

Heat Capacity of Selected Solids

Electrical Conductivity of Aqueous Solutions

Molar Electrical Conductivity of Aqueous HF, HCl, HBr, and HI

Molar Electrical Conductivity of Electrolytes in Aqueous Solution

Ionic Conductivity and Diffusion at Infinite Dilution

Electrochemical Series

Activity Coefficients of Acids, Bases, and Salts

Mean Activity Coefficients of Electrolytes as a Function of Concentration

Enthalpy of Dilution of Acids

Enthalpy of Solution of Electrolytes

Concentrative Properties of Aqueous Solutions

Ebullioscopic Constants for Calculation of Boiling Point Elevation

Cryoscopic Constants for Calculation of Freezing Point Depression

Freezing Point Lowering by Electrolytes in Aqueous Solution

Azeotropic Data for Binary Mixtures

Section 10: Environmental Chemistry Data

Introduction

Chemical Reaction Rate Constants for Atmospheric Studies

Properties of Refrigerants

Global Warming Potential of Greenhouse Gases

Atmospheric Concentration of Carbon Dioxide, 1958-2023

Aqueous Solubility and Henry's Law Constants of Organic Compounds

Properties of Seawater

Solubility of Hydrocarbons in Seawater

Octanol-Water Partition Coefficients

Global Temperature Trend, 1880-2022

Solar Irradiance at the Earth

Geographical and Seasonal Variations in Solar Radiation

Infrared Absorption by the Earth's Atmosphere

U.S. Standard Atmosphere (1976)

Section 11: Solid-State Chemistry and Physics Data

Introduction

Techniques for Materials Characterization

Symmetry of Crystals

Ionic Radii in Crystals

The Madelung Constant and Crystal Lattice Energy

Elastic Constants of Single Crystals

Polarizability of Atoms and Ions in Solids

Electrical Resistivity of Binary Alloys

Electrical Resistivity of Graphite Materials

Curie Temperature of Selected Ferroelectric Crystals

Properties of Antiferroelectric Crystals

Properties of Superconductors

High-Temperature Superconductors

Organic Superconductors

Properties of Semiconductors

Selected Properties of Semiconductor Solid Solutions

Properties of Organic Semiconductors

Diffusion Data for Semiconductors

Properties of Magnetic Materials

Organic Magnets

Properties of Selected Materials at Cryogenic Temperatures

Thermoelectric Properties of Metals and Semiconductors

Thermal Conductivity of Metals and Semiconductors as a Function of Temperature

Fermi Energy and Related Properties of Metals

Secondary Electron Emission

Electron Inelastic Mean Free Paths

Electron Stopping Powers

Attenuation Coefficients for High-Energy Electromagnetic Radiation

Thermal Conductivity of Crystalline Dielectrics

Thermal Conductivity of Ceramics and Other Insulating Materials

Section 12: Industrial Chemistry Data

Introduction

Thermophysical Properties of Air

Thermophysical Properties of Fluids

Thermophysical Properties of Selected Fluids at Saturation

Vapor Pressure of Compounds and Elements

Vapor Pressure of Fluids at Temperatures below 300 K

Vapor Pressure of Saturated Salt Solutions

Enthalpy of Vaporization

Enthalpy of...