Condensed Phase Isotope Effects, Especially Vapor Pressure Isotope Effects: Aqueous Solutions

1975 ◽  
pp. 101-130 ◽  
Author(s):  
W. ALEXANDER VAN HOOK
Keyword(s):  
Vapor Pressure ◽  
Aqueous Solutions ◽  
Condensed Phase ◽  
Isotope Effects

scholarly journals 45Scandium NMR Investigations in Aqueous Solutions

1983 ◽  
Vol 38 (3) ◽  
pp. 317-321 ◽  
Author(s):  
E. Haid ◽  
D. Köhnlein ◽  
G. Kössler ◽  
O. Lutz ◽  
W. Messner ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Chemical Shifts ◽  
Isotope Effects ◽  
Larmor Frequency ◽  
Relaxation Rates ◽  
Nmr Chemical Shifts ◽  
Typical Behaviour ◽  
Solvent Isotope ◽  
Scandium Chloride ◽  
Solvent Isotope Effects

Abstract45Sc NMR chemical shifts, linewidths, and longitudinal relaxation rates have been measured in aqueous solutions of scandium chloride and sulphate as a function of the appropriate acid. A common typical behaviour of these parameters without sudden changes has been observed. Also signals in the basic range have been obtained. H2O -D2O solvent isotope effects on Larmor frequency and relaxation rates are presented.

scholarly journals GaPO4 Single Crystals: Growth Condition by Hydrothermal Refluxing Method

Molecules ◽  
2020 ◽  
Vol 25 (19) ◽  
pp. 4518
Author(s):  
Denis Balitsky ◽  
Etienne Philippot ◽  
Vladimir Balitsky ◽  
Ludmila Balitskaya ◽  
Tatiana Setkova ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Vapor Pressure ◽  
Aqueous Solutions ◽  
Technological Development ◽  
Spatial Separation ◽  
Spontaneous Crystallization ◽  
Β Phase ◽  
Retrograde Solubility ◽  
High Vapor ◽  
Oh Content

Bulk GaPO4 is an advanced piezoelectric material operating under high temperatures according to the α-β phase transition at 970 °C. This work presents the technological development of a hydrothermal refluxing method first applied for GaPO4 single crystal growth. Crystals of 10–20 g were grown in mixtures of aqueous solutions of low- and high-vapor-pressure acids (H3PO4/HCl) at 180–240 °C (10–20 bars). The principal feature of the refluxing method is a spatial separation of crystal growth and nutrient dissolution zones. This leads to a constant mass transportation of the dissolved nutrient, even for materials with retrograde solubility. Mass transport is carried out by dissolution of GaPO4 nutrient in a dropping flow of condensed low-vapor-pressure solvent. This method allows an exact saturation at temperature of equilibrium and avoids spontaneous crystallization as well loss of seeds. Grown crystals have a moderate OH− content and reasonable structural uniformity. Moreover, the hydrothermal refluxing method allows a fine defining of GaPO4 concentration in aqueous solutions of H3PO4, H2SO4, HCl and their mixtures at set T–P parameters (T < 250 °C, p = 10–30 bars). The proposed method is relatively simple to use, highly reproducible for crystal growth of GaPO4 and probably could applied to other compounds with retrograde solubility.

Vapor pressure isotope effects in liquid methyl fluoride

1983 ◽  
Vol 87 (16) ◽  
pp. 3153-3160 ◽  
Author(s):  
Takao Oi ◽  
Jan Shulman ◽  
Anthony Popowicz ◽  
Takanobu Ishida
Keyword(s):  
Vapor Pressure ◽  
Isotope Effects ◽  
Methyl Fluoride

Medium cluster model for vapor pressure isotope effects

1977 ◽  
Vol 66 (10) ◽  
pp. 4433-4441 ◽  
Author(s):  
J. S. Pollin ◽  
Takanobu Ishida
Keyword(s):  
Vapor Pressure ◽  
Cluster Model ◽  
Isotope Effects

Vapor pressure isotope effects in methanol

1971 ◽  
Vol 75 (12) ◽  
pp. 1815-1820 ◽  
Author(s):  
J. L. Borowitz ◽  
Fritz S. Klein
Keyword(s):  
Vapor Pressure ◽  
Isotope Effects
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