Phase diagram and lattice parameter data for the GaAsySb1−y system

1973 ◽  
Vol 2 (3) ◽  
pp. 455-464 ◽  
Author(s):  
Michel F. Gratton ◽  
John C. Woolley
Keyword(s):  
Phase Diagram ◽  
Lattice Parameter Data ◽  
Lattice Parameter

Phase diagram and lattice parameter values for the Hg2x(AgIn)1−xTe2 alloys

1988 ◽  
Vol 107 (1) ◽  
pp. 165-169 ◽  
Author(s):  
P. Grima ◽  
M. Quintero ◽  
G. S. Pérez ◽  
R. Tovar ◽  
J. C. Woolley
Keyword(s):  
Phase Diagram ◽  
Lattice Parameter ◽  
Parameter Values

Phase Diagram and Lattice Parameter Values of Hg2x(AgIn)1−xSe2 Alloys

1992 ◽  
Vol 134 (1) ◽  
pp. K1-K4 ◽  
Author(s):  
P. Grima Gallardo ◽  
Y. Ng Lee
Keyword(s):  
Phase Diagram ◽  
Lattice Parameter ◽  
Parameter Values

Thermal Expansion Of GaN And Ain

1997 ◽  
Vol 482 ◽  
Author(s):  
Kai Wang ◽  
Robert R. Reeber
Keyword(s):  
Experimental Data ◽  
Residual Stress ◽  
Thermal Expansion ◽  
Lattice Parameter Data ◽  
Equations Of State ◽  
Lattice Parameter ◽  
Epitaxial Films ◽  
Residual Stress Distribution ◽  
Interatomic Potentials ◽  
Semiempirical Models

AbstractThe temperature dependence of the thermal expansion and the bulk modulus are critical for predicting the residual stress distribution in epitaxial films and provides information relevant for interatomic potentials and equations of state. The thermal expansions of aluminum nitride (AIN) and gallium nitride (GaN) are calculated with two models that employ the limited elastic and lattice parameter data. These semiempirical models allow prediction of the thermal expansions to higher temperatures. Calculated results are compared with experimental data.

scholarly journals Evidence for a high-pressure isostructural transition in nitrogen

2021 ◽  
Author(s):  
Chunmei Fan ◽  
Shan Liu ◽  
Jingyi Liu ◽  
Qiqi Tang ◽  
Binbin Wu ◽  
...  
Keyword(s):  
Phase Transition ◽  
Phase Diagram ◽  
High Pressure ◽  
Lattice Parameter ◽  
Molecular Symmetry ◽  
Solid Nitrogen ◽  
Slight Rotation ◽  
Pressure Phase ◽  
Important Objective ◽  
Isostructural Phase Transition

Abstract Understanding the high-pressure behaviors of diatomic molecules (H2, O2, N2, etc) is one of the most basic as well as important objective in high-pressure physics. Under high pressure diatomic molecule solids often exhibit rich crystal polymorphs. High-pressure isostructural transitions (HPIT) in solid hydrogen and oxygen, involving considerable technical challenges, have been experimentally documented, suggesting a possible prevailing pressure-driven molecular-symmetry breaking pathway. In spite of extensive efforts, however, HPIT in nitrogen has not been observed so far. Here we present a monoclinic-to-monoclinic isostructural phase transition (λ→λ’) in solid nitrogen at approximately 50 GPa accompanied with anomalies in lattice parameter, atomic volume and Raman vibron modes. Further ab initio calculations strongly confirmed the HPIT in nitrogen, showing the weak distortion of orientation and slight rotation in nitrogen molecules possibly drive the low-pressure phase, λ-N2, to an isostructural high-pressure phase, λ’-N2 without changing crystal symmetry. In addition, we probed in detail the phase stability and revisited the pressure-temperature (P-T) phase diagram of nitrogen, discovering a new high-pressure amorphous phase, η’-N2.

Novel Discrete Micellar Cubic Phase From a Mixture of GMO/Ethanol/Water

2005 ◽  
Vol 58 (11) ◽  
pp. 762 ◽  
Author(s):  
Rivka Efrat ◽  
Abraham Aserin ◽  
Dganit Danino ◽  
Ellen J. Wachtel ◽  
Nissim Garti
Keyword(s):  
Phase Diagram ◽  
Liquid Crystalline ◽  
Ternary Phase Diagram ◽  
Lattice Parameter ◽  
Phase Region ◽  
Small Island ◽  
Cubic Phase ◽  
Cubic Symmetry ◽  
Low Viscosity ◽  
Novel Structure

During the reconstruction the ternary phase diagram of glycerol monooleate (GMO)/ethanol/water, we detected a novel structure not previously seen. The new phase, denoted QL (micellar cubic liquid), is located within the 49–54 wt.-% water/41–33 wt.-% GMO binary mixture line and at 10–13 wt.-% EtOH in a small island within the phase diagram close to the cubic liquid-crystalline phase region. The QL phase is transparent (not tinted), of a low viscosity (36.6 Pa s), non-birefringent, and stable at room temperature. Evidence from severe centrifugation, synchrotron small-angle X-ray scattering (SAXS) measurements, and rheological behavior revealed that the sample is a single phase. SAXS reflections suggest that two types of domain may coexist. The symmetry of the QL phase is Pm3n. A cubic micellar structure is the dominant mesostructure of this unique sample. Cryo-TEM images show highly ordered domains with cubic symmetry, of lattice parameter 103 ± 2 Å. A possible transformation pathway to the QL phase is a ‘rupture and refusion’ mechanism, as the phase seems to have discontinuous symmetry.

scholarly journals PASCal: a principal axis strain calculator for thermal expansion and compressibility determination

2012 ◽  
Vol 45 (6) ◽  
pp. 1321-1329 ◽  
Author(s):  
Matthew J. Cliffe ◽  
Andrew L. Goodwin
Keyword(s):  
Thermal Expansion ◽  
Lattice Parameter Data ◽  
Principal Axis ◽  
Molecular Conformation ◽  
Variable Temperature ◽  
Lattice Parameter ◽  
Mechanical Anisotropy ◽  
Variable Pressure ◽  
Coordination Polyhedra ◽  
Compressibility Effect

This article describes a web-based tool (PASCal; principal axis strain calculator; http://pascal.chem.ox.ac.uk) designed to simplify the determination of principal coefficients of thermal expansion and compressibilities from variable-temperature and variable-pressure lattice parameter data. In a series of three case studies,PASCalis used to reanalyse previously published lattice parameter data and show that additional scientific insight is obtainable in each case. First, the two-dimensional metal–organic framework [Cu2(OH)(C8H3O7S)(H2O)]·2H2O is found to exhibit the strongest area negative thermal expansion (NTE) effect yet observed; second, the widely used explosive HMX exhibits much stronger mechanical anisotropy than had previously been anticipated, including uniaxial NTE driven by thermal changes in molecular conformation; and third, the high-pressure form of the mineral malayaite is shown to exhibit a strong negative linear compressibility effect that arises from correlated tilting of SnO6and SiO4coordination polyhedra.

Phase Diagram, Lattice Parameter, and Optical Energy Gap Values for the Cd2x(CuGa)yMn2zTe2 Alloys

1993 ◽  
Vol 107 (1) ◽  
pp. 264-272 ◽  
Author(s):  
R. Goudreault ◽  
J.C. Woolley ◽  
M. Quintero ◽  
R. Tovar
Keyword(s):  
Phase Diagram ◽  
Energy Gap ◽  
Lattice Parameter ◽  
Optical Energy Gap ◽  
Optical Energy ◽  
Gap Values
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