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High-resolution, high-sensitive ac calorimeter.
(1992)
A high-resoln., high-sensitivity, automated ac calorimeter capable of heat capacity measurements
of very small samples (m < 20 mg) with a temp. resoln. of a few mK in the ac mode is described.
This calorimeter also can be ...
X-ray absorption spectroscopy studies of local structure and electronic properties of NaxSi136 (0 < x < 24) clathrates.
(2010)
The local structure and electronic properties were probed of Na-contg. type II Si clathrates by
x-ray absorption spectroscopy. The near-edge region of the spectrum is particularly sensitive to the
local structure surrounding ...
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 ...
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 ...
Heat capacity, lattice dynamics, and thermodynamic stability of the negative thermal expansion material HfMo2O8
(2007-06)
We explore the lattice dynamics of the negative thermal expansion material, cubic HfMo2O8,
through analysis of its heat capacity (measured from 0.5 to 300 K) and its room-temperature Raman
spectrum. Its heat capacity is ...
Thermal, vibrational, and thermoelastic properties of Y2Mo3O12 and their relations to negative thermal expansion
(American Physical Society, 2014-07-21)
Y2 Mo3O12, a material that exhibits negative thermal expansion (NTE) from 10 to 1173 K, offers an excellent opportunity to examine relationships between NTE and other physical properties over a wide temperature range. We ...
The heat capacities of thermomiotic ScF3 and ScF3–YF3 solid solutions
(Springer, 2015-05-01)
Scandium trifluoride (ScF3) exists in a cubic ReO3 structure that exhibits negative thermal expansion from 10 to 1100 K, while substituted Sc1−x Y x F3 materials display the same behavior at room temperature but transition ...
Zero Thermal Expansion in ZrMgMo3O12: NMR Crystallography Reveals Origins of Thermoelastic Properties
(American Chemical Society, 2015-03-23)
The coefficient of thermal expansion of ZrMgMo3O12 has been measured and was found to be extremely close to zero over a wide temperature range including room temperature ( = (1.6 ± 0.2) × 10–7 K–1 from 25 to 450 °C by X-ray ...
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 ...