Conductance, viscosity, density, proton magnetic resonance spectra, and glass transition temperatures of calcium nitrate tetrahydrate-cadmium nitrate tetrahydrate melts. An ideal fused salt system

C. T. Moynihan, C. R. Smalley, Charles Angell, E. J. Sare

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Abstract

Conductance, viscosity, density, pmr spectra, and glass transition temperature measurements have been performed for the binary hydrate melt system calcium nitrate tetrahydrate-cadmium nitrate tetrahydrate. Chemical shift vs. composition plots for the water proton resonance indicate that in these melts the Ca2+ and Cd2+ ions are equally hydrated. Glass transition temperatures are a linear function of cation fraction of Cd2+ and decrease from 222 to 210° as XCd2+ increases from 0 to 1. Both conductance and fluidity exhibit a non-Arrhenius temperature dependence for all compositions and have been described in terms of three-parameter equations of the forms Λ = AΛT-1/2 exp[-kΛ/(T - T0,Λ)] and φ = AφT-1/2 exp[-kφ/(T - T0,φ)]. It is shown that the parameters in these equations have a simple dependence on composition such that T0,Λ = T0,φ for each composition, kΛ and kφ are composition independent, and ln AΛ and ln Aφ show identical linear dependences on composition. Plots of T0,Λ and T0,φ vs. XCd2+ parallel similar plots for the glass transition temperature, Tg. Both conductance and fluidity isotherms show negative deviations from additivity as a function of composition, primarily as a result of the composition dependence of the T0,Λ and T0,φ parameters.

Original languageEnglish (US)
Pages (from-to)2287-2293
Number of pages7
JournalJournal of Physical Chemistry
Volume73
Issue number7
StatePublished - 1969
Externally publishedYes

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Fused salts
proton magnetic resonance
Cadmium
glass transition temperature
cadmium
nitrates
calcium
Calcium
Nitrates
Nuclear magnetic resonance
Viscosity
viscosity
salts
Chemical analysis
Fluidity
plots
proton resonance
Glass transition temperature
calcium nitrate
cadmium nitrate

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

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title = "Conductance, viscosity, density, proton magnetic resonance spectra, and glass transition temperatures of calcium nitrate tetrahydrate-cadmium nitrate tetrahydrate melts. An ideal fused salt system",
abstract = "Conductance, viscosity, density, pmr spectra, and glass transition temperature measurements have been performed for the binary hydrate melt system calcium nitrate tetrahydrate-cadmium nitrate tetrahydrate. Chemical shift vs. composition plots for the water proton resonance indicate that in these melts the Ca2+ and Cd2+ ions are equally hydrated. Glass transition temperatures are a linear function of cation fraction of Cd2+ and decrease from 222 to 210° as XCd2+ increases from 0 to 1. Both conductance and fluidity exhibit a non-Arrhenius temperature dependence for all compositions and have been described in terms of three-parameter equations of the forms Λ = AΛT-1/2 exp[-kΛ/(T - T0,Λ)] and φ = AφT-1/2 exp[-kφ/(T - T0,φ)]. It is shown that the parameters in these equations have a simple dependence on composition such that T0,Λ = T0,φ for each composition, kΛ and kφ are composition independent, and ln AΛ and ln Aφ show identical linear dependences on composition. Plots of T0,Λ and T0,φ vs. XCd2+ parallel similar plots for the glass transition temperature, Tg. Both conductance and fluidity isotherms show negative deviations from additivity as a function of composition, primarily as a result of the composition dependence of the T0,Λ and T0,φ parameters.",
author = "Moynihan, {C. T.} and Smalley, {C. R.} and Charles Angell and Sare, {E. J.}",
year = "1969",
language = "English (US)",
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pages = "2287--2293",
journal = "Journal of Physical Chemistry",
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TY - JOUR

T1 - Conductance, viscosity, density, proton magnetic resonance spectra, and glass transition temperatures of calcium nitrate tetrahydrate-cadmium nitrate tetrahydrate melts. An ideal fused salt system

AU - Moynihan, C. T.

AU - Smalley, C. R.

AU - Angell, Charles

AU - Sare, E. J.

PY - 1969

Y1 - 1969

N2 - Conductance, viscosity, density, pmr spectra, and glass transition temperature measurements have been performed for the binary hydrate melt system calcium nitrate tetrahydrate-cadmium nitrate tetrahydrate. Chemical shift vs. composition plots for the water proton resonance indicate that in these melts the Ca2+ and Cd2+ ions are equally hydrated. Glass transition temperatures are a linear function of cation fraction of Cd2+ and decrease from 222 to 210° as XCd2+ increases from 0 to 1. Both conductance and fluidity exhibit a non-Arrhenius temperature dependence for all compositions and have been described in terms of three-parameter equations of the forms Λ = AΛT-1/2 exp[-kΛ/(T - T0,Λ)] and φ = AφT-1/2 exp[-kφ/(T - T0,φ)]. It is shown that the parameters in these equations have a simple dependence on composition such that T0,Λ = T0,φ for each composition, kΛ and kφ are composition independent, and ln AΛ and ln Aφ show identical linear dependences on composition. Plots of T0,Λ and T0,φ vs. XCd2+ parallel similar plots for the glass transition temperature, Tg. Both conductance and fluidity isotherms show negative deviations from additivity as a function of composition, primarily as a result of the composition dependence of the T0,Λ and T0,φ parameters.

AB - Conductance, viscosity, density, pmr spectra, and glass transition temperature measurements have been performed for the binary hydrate melt system calcium nitrate tetrahydrate-cadmium nitrate tetrahydrate. Chemical shift vs. composition plots for the water proton resonance indicate that in these melts the Ca2+ and Cd2+ ions are equally hydrated. Glass transition temperatures are a linear function of cation fraction of Cd2+ and decrease from 222 to 210° as XCd2+ increases from 0 to 1. Both conductance and fluidity exhibit a non-Arrhenius temperature dependence for all compositions and have been described in terms of three-parameter equations of the forms Λ = AΛT-1/2 exp[-kΛ/(T - T0,Λ)] and φ = AφT-1/2 exp[-kφ/(T - T0,φ)]. It is shown that the parameters in these equations have a simple dependence on composition such that T0,Λ = T0,φ for each composition, kΛ and kφ are composition independent, and ln AΛ and ln Aφ show identical linear dependences on composition. Plots of T0,Λ and T0,φ vs. XCd2+ parallel similar plots for the glass transition temperature, Tg. Both conductance and fluidity isotherms show negative deviations from additivity as a function of composition, primarily as a result of the composition dependence of the T0,Λ and T0,φ parameters.

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