Chemistry: Recent submissions
Now showing items 161-180 of 234
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High-throughput resistivity apparatus for thin-film combinatorial libraries
(2005-09)An apparatus, capable of measuring the dc resistance versus temperature of a 49-member library prepared by thin-film deposition techniques was designed and tested. The library is deposited by dc magnetron sputtering onto ... -
Thermal conductivities of a clathrate with and without guest molecules.
(1992)The thermal conductivities of Dianin's compd. [4-(p-hydroxyphenyl)-2,2,4-trimethylchroman] and its ethanol adduct in the temp. range 20-250 K are reported. This clathrate has the same stable structure both with and without ... -
Investigation of factors affecting crystallization of cyclopentane clathrate hydrate
(2008-11)We report the results of systematic investigations of the influence of thermal history and other factors on crystallization of a model clathrate hydrate (cyclopentane hydrate) studied as water-in-oil and oil-in-water ... -
The Phase-Transitions of Ferroelastic K2SeBr6 - a Calorimetric and X-Ray-Diffraction Study
(1990-12)No abstract available. -
Thermal conductivity of (Er1-xYx)(2)Ti2O7 pyrochlore oxide solid solutions
(2012-08)The thermal conductivities of pyrochlore oxide solid solutions of general formula (Er1-xYx)(2)Ti2O7 with 0 <= x <= 1 have been determined for high-quality single crystals aligned along the [110] direction, over the ... -
A study of phase transitions in cadmium perchlorate hexahydrate (Cd(ClO4)2.6H2O) by adiabatic calorimetry and infrared spectroscopy.
(1985)A calorimetric study of Cd(ClO4)2.6H2O from 20 to 345 K shows 3 phase transformations, at 124.8, 238.45, and 271.62 K. IR spectra indicate that the low-temp. structure (below 124.8 K) contains 1 type of [Cd(OH2)6]2+, of ... -
A calorimetric investigation of the low-temperature phase transition in sodium hydroxide-d.
(1986)The heat capacity of NaOD from 20 to 350 K is reported. An anomaly centered at 153.2 ± 0.1 K (?H = 131.1 ± 0.7 J/mol, ?S = 0.864 ± 0.005 J/K.mol) corresponds to the onset of a low-temp. antiferroelec. phase. This ... -
Phase transitions in M(ClO4)2.6H2O (M = magnesium, zinc). Investigations by adiabatic calorimetry and infrared spectroscopy.
(1986)IR spectra of Mg(ClO4)2.6H2O at 10 K indicate a complex structure contg. at least 16 distinct types of H2O protons. At 107.9 K this structure transforms sharply to a much simpler disordered form (?Strans = 7.754 J K-1 ... -
The nature of ammonium ion disorder in ammonium tetrafluoroaluminate, NH4AlF4.
(1985)To clarify previous conflicting reports concerning the existence of an order-disorder phase transition in NH4AlF4 at T ?150 K, the heat capacity of this compd. was measured from T = 15 to 305 K, by adiabatic calorimetry. ... -
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Why is there no low-temperature phase transition in NaOH?
(1999-02)Although NaOH and NaOD exhibit parallel polymorphism at high temperatures, NaOD exhibits a low-temperature phase transition to a hydrogen-bonded antiferroelectric phase and no comparable transition has been found in NaOH. ... -
Deductions about the Structure of Phase-Iii from Thermodynamic Measurements on Solid Isotopic Methanes
(1979)No abstract available. -
Thermodynamic Characterization of the Low-Temperature Phase-Transformations in Koh and Kod
(1988-10)No abstract available. -
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Phase-III of Cd4 - Reconciliation of Inelastic Neutron-Scattering and Heat-Capacity Measurements of Rotational Tunneling Levels
(1982)No abstract available. -
Automated, low-temperature dielectric relaxation apparatus for measurement of air-sensitive, corrosive, hygroscopic, powdered samples
(1999-07)An automated apparatus for dielectric determinations on solid samples was designed to allow cryogenic measurements on air-sensitive, corrosive, hygroscopic, powdered samples, without determination of sample thickness, ... -
Phase-Transitions in Mg(ClO4)2.6H20, Zn(ClO4)2.6H2O - Investigations by Adiabatic Calorimetry and Infrared-Spectroscopy
(1986-03)No abstract available.