Table 1: Refined compositions of Ca3NbGa3Si2O14 and La3Ga5.5Nb0.5O14 crystals according to the results of the neutron diffraction analysis (NDA).

CrystalUnit cell parameters,
,
Refined composition (NDA)

CNGS-1 8.0911 (2)
4.9811 (1)
( )
LGN-1 8.2283 (4)
5.1268 (3)
( )( )Ga3( )( )
LGN-2 8.2293 (3)
5.1272 (2)
( )( )Ga5( )