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- W2079311918 endingPage "3719" @default.
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- W2079311918 abstract "The 0.5Na2S + 0.5[xGeS2 + (1 – x)PS5/2] mixed glass former (MGF) glass system exhibits a nonlinear and nonadditive negative change in the Na+ ion conductivity as one glass former, PS5/2, is exchanged for the other, GeS2. This behavior, known as the mixed glass former effect (MGFE), is also manifest in a negative deviation from the linear interpolation of the glass transition temperatures (Tg) of the binary end-member glasses, x = 0 and x = 1. Interestingly, the composition dependence of the densities of these ternary MGF glasses reveals a slightly positive MGFE deviation from a linear interpolation of the densities of the binary end-member glasses, x = 0 and x = 1. From our previous studies of the structures of these glasses using IR, Raman, and NMR spectroscopies, we find that a disproportionation reaction occurs between PS7/24- and GeS32- units into PS43- and GeS5/21- units. This disproportionation combined with the formation of Ge4S104- anions from GeS5/21- groups leads to the negative MGFE in Tg. A best-fit model of the Tgs of these glasses was developed to quantify the amount of GeS5/21- units that form Ge4S104- molecular anions in the ternary glasses (∼5–10%). This refined structural model was used to develop a short-range structural model of the molar volumes, which shows that the slight densification of the ternary glasses is due to the improved packing efficiency of the germanium sulfide species." @default.
- W2079311918 created "2016-06-24" @default.
- W2079311918 creator A5015751758 @default.
- W2079311918 creator A5053454171 @default.
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- W2079311918 date "2014-03-25" @default.
- W2079311918 modified "2023-10-17" @default.
- W2079311918 title "Short Range Structural Models of the Glass Transition Temperatures and Densities of 0.5Na<sub>2</sub>S + 0.5[<i>x</i>GeS<sub>2</sub> + (1 – <i>x</i>)PS<sub>5/2</sub>] Mixed Glass Former Glasses" @default.
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- W2079311918 doi "https://doi.org/10.1021/jp411942t" @default.
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