Sol-Gel Synthesis, X-Ray Diffraction Studies, and Electric Conductivity of Sodium Europium Silicate

Table 5

Selected interatomic distances, (Å).

Composition	Si–O(1)	Si–O(2)	Si–O(3)	Max. difference	Reference
NaEu9(SiO4)6O2	1.56	1.69	1.69 × 2	0.13	Current work
Eu8.18Na1.08(SiO4)6(OH)1.62-2yOy	1.668	1.567	1.616 × 2	0.101	[12]
La9.33(SiO4)6O2	1.618	1.630	1.623 × 2	0.012	[13]
La9.67Si6O26.5	1.622	1.633	1.631 × 2	0.011	[14]
La9.55(SiO4)6O2.32	1.621	1.631	1.617 × 2	0.014	[15]
La9.33(SiO4)6O2	1.65	1.60	1.63 × 2	0.05	[16]
Nd9.33(SiO4)6O2	1.63	1.64	1.61 × 2	0.03	[16]