Dokl. Akad. Nauk SSSR, 1969 Volume 186, Number 4,Pages 820–823(Mi dan34676)
CRYSTALLOGRAPHY
Experimental investigation of the enthalpy of chemically reacting system
$\mathrm{Na}_2\mathrm{Ti}_2\mathrm{Si}_2\mathrm{O}_9=
\mathrm{Na}_2\mathrm{Ti}_2\mathrm{O}_3[\mathrm{Si}_2\mathrm{O}_6]$