Dokl. Akad. Nauk SSSR, 1987 Volume 292, Number 5,Pages 1127–1130(Mi dan47832)
CRYSTALLOGRAPHY
The change of $\mathrm{Fe}^{3+}$ structural position under melting of acmite in the
$\mathrm{NaFeSi}_2\mathrm{O}_6$ – $\mathrm{Na}_2\mathrm{Si}_2\mathrm{O}_5$ – $\mathrm{SiO}_2$ system from the Mössbouer spectroscopy data