Synthesis, Crystal Structure Refinement, and Electrical Conductivity of Pb_(8−x)Na₂Sm_x(VO₄)₆O_(x/2)

Table 3

Interatomic distances (́Å) in Pb_(8−𝑥)Na₂Sm_𝑥(VO₄)₆O_(𝑥/2).

Composition, 𝑥	𝑥=0	𝑥=0.15
Pb(1)–O(1) x3	2.460(11)	2.538(12)
Pb(1)–O(2) x3	2.899(13)	2.806(13)
Pb(1)–O(3) x3	3.042(12)	2.988(12)
⟨Pb(1)--O(1--3)⟩	2.800(4)	2.777(4)
Pb(2)–O(1)	2.74(2)	2.74(2)
Pb(2)–O(2)	2.21(2)	2.21(2)
Pb(2)–O(3) x2	2.555(10)	2.518(10)
Pb(2)–O(3) x2	2.598(11)	2.677(12)
⟨Pb(2)--O(1--3)⟩	2.543(6)	2.557(7)
V–O(1)	1.67(2)	1.59(2)
V–O(2)	1.66(2)	1.76(2)
V–O(3) x2	1.664(11)	1.652(11)
⟨V--O⟩	1.665(9)	1.664(9)
Pb(2)–Pb(2) x2	4.385(3)	4.384(3)

Note: data are given for the solid solution with 𝑥=0 and 𝑥=0.15; hence, interatomic distances for the intermediate compositions will be within an error.