1,541 research outputs found
Computational Thermodynamics and Kinetics in Materials Modelling and Simulations
Over the past two decades, Computational Thermodynamics and Kinetics have been tremendously contributed to materials modeling and simulations and the demands on quantitative
conceptual design and processing of various advanced materials arisen from various industries and academic
institutions involved in materials manufacturing, engineering and applications are still rapidly increasing
N-(3,4-Dichlorophenyl)thiourea
In the title compound, C7H6Cl2N2S, the benzene ring and the mean plane of the thiourea fragment [—N—C(=S)—N] make a dihedral angle of 66.77 (3)°. Intermolecular N—H⋯S and N—H⋯Cl hydrogen bonds link the molecules into a three-dimensional network
Wigner solution of the quark gap equation
Solutions and their evolutions of the quark gap equation are studied within
the Nambu-Jona--Lasinio model, which is a basic issue for studying the QCD
phase structure and locating the possible critical end point. It is shown that
in the chiral limit case of the vacuum, chiral symmetry will hold if the
coupling strength is small, then the system only has the Wigner solution at
. If increasing , two symmetric minima will appear as the positive and
`negative' Nambu solutions, however, the solution now corresponds to a
maximum instead of a minimum of the thermodynamical potential, so is not a
physically stable state anymore (we call it `pseudo-Wigner solution'). Besides,
it is shown that as the current quark mass increases, the pseudo-Wigner
solution will become negative, and disappear together with the negative Nambu
solution if is large enough. Similar things happen if we increase the
temperature or quark chemical potential . Some interesting phenomenon is,
from some a second local minimum will show up. As increases
gradually, it will be stabler than the Nambu solution, survives even the Nambu
solution disappears, and approaches , which are just the features of the
Wigner solution we expect.Comment: version accepted for publication in the European Physical Journal
catena-Poly[[triaqua(pyridine-κN)nickel(II)]-μ-sulfato-κ2 O:O′]
The title compound, [Ni(SO4)(C5H5N)(H2O)3]n, was synthesized by the hydrothermal reaction of NiSO4·6H2O, pyridine and water. The central NiII atom is coordinated in a distorted octahedral environment by a pyridine N atom, three aqua O atoms and two O atoms of bridging sulfate anions, yielding a zigzag chain. A three-dimensional network is generated via complex hydrogen bonds involving the sulfate and aqua ligands and a pyridine C—H group
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