Introduction 951
I. Changes in the Unit-cell Volumes of Chemical Compounds Produced by Substitution of Heavier Isotopes for Lighter Ones 951
II. Temperature Dependence of Isotope Effects in the Lattice Parameters and Shifts in Phasetransition Temperatures in Deuterated Compounds 954
III. Low-temperature Apparatus for Studying the Structures of Isotopes 957
IV. Isotopic Morphotropy of the Isotopes of Hydrogen 960
V. Isotope Effects in the Lattices of the Isotopes of the Inert Gases (He, Ne) 961
VI. Isotope Effects in the Lattice Parameters of Isotopes of Metals (Li, Ni) and the Temperature Dependence of These Effects 963
VII. Attempted Theoretical Treatments of the Problem of Isotope Effects in the Structural Properties of Solids 965
VIII. The Magnitude and Sign of the Isotope Effect in Crystals with Differing Binding Forces 968
IX. Solid Solutions of the Hydrogen Isotopes and the Liquid-solid Phase Diagrams for Systems Consisting of the Hydrogen Isotopes 969
X. Conclusion 972
Bibliography 973