Dokl. Akad. Nauk SSSR, 1983 Volume 269, Number 4,Pages 850–852(Mi dan46035)
CRYSTALLOGRAPHY
A new type of silicate radical $\mathrm{Si}_5\mathrm{O}_{16}$ in the structure of
$\mathrm{Na}_4\mathrm{Sn}_2[\mathrm{Si}_5\mathrm{O}_{16}]\cdot\mathrm{H}_2\mathrm{O}$