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Oct 1982

Volume 11, Issue 4, pp. 1005-1169


Behavior of the AB2‐Type Compounds at High Pressures and High Temperatures

Leo Merrill

J. Phys. Chem. Ref. Data 11, 1005 (1982); http://dx.doi.org/10.1063/1.555670 (60 pages)

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Data on the polymorphic phase transformations of known compounds and new synthetic compounds of the type AB2 have been compiled and evaluated. All available pressure studies have been included and referenced. Pressure‐temperature phase diagrams showing first order solid‐solid phase boundaries and/or melting curves showing the best fit to the experimental data are included. For some materials which can be produced only by chemical synthesis techniques at high pressures and high temperatures, reaction‐product diagrams have been employed to estimate the region of thermodynamic stability. Crystallographic data of all the known phases of each material have been tabulated and evaluated. This review covers 168 compounds and 332 phases including the room temperature atmospheric pressure phase for each compound when it exists.
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64.70.K- Solid-solid transitions
64.70.D- Solid-liquid transitions
61.66.Fn Inorganic compounds
61.50.Ks Crystallographic aspects of phase transformations; pressure effects

Heat Capacity and Other Thermodynamic Properties of Linear Macromolecules VI. Acrylic Polymers

Umesh Gaur, Suk‐fai Lau, Brent B. Wunderlich, and Bernhard Wunderlich

J. Phys. Chem. Ref. Data 11, 1065 (1982); http://dx.doi.org/10.1063/1.555671 (25 pages) | Cited 9 times

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Heat capacity of poly(methyl methacrylate), polyacrylonitrile, poly(methyl acrylate), poly(ethyl acrylate), poly(n‐butyl acrylate), poly(iso‐butyl acrylate), poly(octadecyl acrylate), poly(methacrylic acid), poly(ethyl methacrylate), poly(n‐butyl methacrylate), poly(iso‐butyl methacrylate), poly(hexyl methacrylate), poly(dodecyl methacrylate), poly(octadecyl methacrylate) and polymethacrylamide is reviewed on the basis of measurements on 35 samples reported in the literature. A set of recommended data are derived for each acrylic polymer in the amorphous state. Enthalpy and entropy functions are calculated for poly(methyl methacrylate) and polyacrylonitrile. This is the sixth paper in a series of publications which will ultimately cover all heat capacity measurements on linear macromolecules.
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36.20.-r Macromolecules and polymer molecules
65.40.-b Thermal properties of crystalline solids
65.60.+a Thermal properties of amorphous solids and glasses: heat capacity, thermal expansion, etc.
65.80.-g Thermal properties of small particles, nanocrystals, nanotubes, and other related systems
65.20.-w Thermal properties of liquids
65.40.gd Entropy

Molecular Form Factors and Photon Coherent Scattering Cross Sections of Water

L. R. M. Morin

J. Phys. Chem. Ref. Data 11, 1091 (1982); http://dx.doi.org/10.1063/1.555672 (8 pages) | Cited 13 times

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Tabulations are presented of molecular form factors F(x), for values of x=sin(θ/2)/λ from 0 to 1.25 Å1, for liquid water at eight temperatures between 4 °C and 200 °C and for the free water molecule. For liquid water, x=0 to 1.25 Å1, the tabulated values are interpolated from experimental values of Narten and Levy (1971). For the free water molecule, x=0 to 1.25 Å1, the tabulated values are interpolated from calculated values of Blum (1971). For x=1.25 to 109 Å1, the independent atomic scattering hypothesis is assumed and the water molecular form factor F(x) is calculated from the hydrogen and oxygen atomic form factors given by Hubbell and Overbo (1979). Tables of coherent scattering cross sections, obtained by numerical integration of the Thomson formula, weighted by F2(x), are presented for liquid water at eight temperatures between 4 °C and 200 °C and for the free water molecule, for photon energies 5 keV to 1 MeV.
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61.25.Em Molecular liquids
78.70.Ck X-ray scattering
33.80.-b Photon interactions with molecules

Evaluation of Binary PTxy Vapor–Liquid Equilibrium Data for C6 Hydrocarbons. Benzene+Cyclohexane

Buford D. Smith, Ol Muthu, Ashok Dewan, and Matthew Gierlach

J. Phys. Chem. Ref. Data 11, 1099 (1982); http://dx.doi.org/10.1063/1.555673 (28 pages)

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The methods used to evaluate subcritical binary PTxy vapor‐liquid equilibrium data are described. The evaluation results for the benzene+cyclohexane system are presented. The needs for new experimental data are defined.
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64.70.F- Liquid-vapor transitions
65.20.-w Thermal properties of liquids
65.40.gd Entropy
51.30.+i Thermodynamic properties, equations of state

Evaluation of Binary Excess Enthalpy Data for C6 Hydrocarbons. Benzene+Cyclohexane

Buford D. Smith, Ol Muthu, Ashok Dewan, and Matthew Gierlach

J. Phys. Chem. Ref. Data 11, 1127 (1982); http://dx.doi.org/10.1063/1.555674 (23 pages)

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The methods used to evaluate excess enthalpy data are described. The evaluation results for the benzene+cyclohexane system are presented. The needs for new experimental data are defined.
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65.20.-w Thermal properties of liquids
65.40.gd Entropy

Evaluation of Binary Excess Volume Data for C6 Hydrocarbons. Benzene+Cyclohexane

Buford D. Smith, Ol Muthu, Ashok Dewan, and Matthew Gierlach

J. Phys. Chem. Ref. Data 11, 1151 (1982); http://dx.doi.org/10.1063/1.555669 (19 pages) | Cited 1 time

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The methods used to evaluate excess volume data are described. The evaluation results for the benzene+cyclohexane system are presented. The needs for new experimental data are defined.
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82.60.Lf Thermodynamics of solutions
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