Structure and Dynamics of a Lattice of Tetragonal Germanates R2Ge2O7 (R = Tb-Lu, Y): Ab Initio Calculation

V. S. Ryumshin, V. A. Chernyshev

The crystal structure, phonon spectrum, and elastic constants of a series of rare-earth germanates (including yttrium germanate R2Ge2O7 (R = Tb-Lu, Y)) with a tetragonal structure…