Polarized Raman spectroscopy was used to investigate the room‐temperature phonon
characteristics of a series of rare‐earth arsenate (REAsO4, RE= Sm, Eu, Gd, Tb, Dy, Ho, Tm,
Yb, and Lu) single crystals. The Raman data were interpreted in a systematic manner based
on the known tetragonal zircon structure of these compounds, and assignments and
correlations were made for the observed bands. We found that the wavenumbers of the
internal modes of the AsO4 tetrahedron increased with increasing atomic number. This …

[en] Polarized Raman Spectroscopy was used to investigate the room-temperature phonon
characteristics of a series of rare-earth arsenate (REAsO4, RE= Sm, Eu, Gd, Tb, Dy, Ho, Tm,
Yb, and Lu) single crystals. The Raman data were interpreted in a systematic manner based
on the known tetragonal zircon structure of these compounds, and assignments and
correlations were made for the observed bands. We found that the wavenumber of the
internal modes of the AsO4 tetrahedron increased with increasing atomic number, and for …