Table 1. Ionic conductivity of cation-substituted compounds X₁₀MP₂S₁₂.

Compound	DFT simulation		Experimental
	Ea (eV)	Conductivity, 298 K (mS cm−1)	Ea (eV)	Conductivity, 298 K (mS cm−1)
Na10SiP2S12	0.229	10.28	NA	NA
Na10GeP2S12	0.270	3.50	NA	NA
Na10SnP2S12	0.317	0.94	0.356	0.4 (this work)
Li10SiP2S12	0.20	23 (ref. 20)	0.196	2.3 (ref. 21)
Li10GeP2S12	0.21	13 (ref. 20)	0.22–0.25	9–12 (refs 11, 22)
Li10SnP2S12	0.24	6 (ref. 20)	0.24–0.27	4–7 (refs 23, 24)

NA, not applicable. DFT simulation and experimental results on the sodium structures are from this work. Experimental and calculated values for the Li compounds are taken from the literature.