fig9

Figure 9. (A) Crystal structure of the Li₁₀GeP₂S₁₂; (B) Single lithium-ion jumps within the hcp-like packing and bcc-like packing of anion frameworks^[145]. Reproduced with permission^[145]. Copyright 2020, Wiley-VCH GmBH; (C) The crystal structure of Li₁₀SnP₂S₁₂^[37]. Reproduced with permission^[37]. Copyright 2013, American Chemical Society; (D) (upper) Schematic of the hypothetical inductive effect in M-S Li bonding for M = Ge vs. M = Sn. (lower left) Changes in the S-Li distances and occupancies with changing force constant in Li₁₀Ge_1-xSn_xP₂S₁₂. (lower right) S-Li distance versus previously reported activation energies^[146]. Reproduced with permission^[146]. Copyright 2020, American Chemical Society; (E) Compositional complexity metric for LGPS-type and argyrodite-type versus crystal structure indicator, the volume ratio of anions to that of cations; (F) Arrhenius plots for the ionic conductivities of Li_9.54[Si_0.6Ge_0.4]_1.74P_1.44S_11.1Br_0.3O_0.6 and Li₁₀GeP₂S₁₂^[20]. Reproduced with permission^[20]. Copyright 2023, The American Association for the Advancement of Science.