Dokl. Akad. Nauk SSSR, 1970 Volume 193, Number 1,Pages 87–89(Mi dan35519)
CRYSTALLOGRAPHY
Apatite-like phases in $\mathrm{MeO}$ – $\mathrm{Nd}_2\mathrm{O}_3$ – $\mathrm{SiO}_2$ systems (where
$\mathrm{Me}=\mathrm{Mg},\mathrm{Ca},\mathrm{Ba}$) based on infrared spectroscopy data