High‐pressure Nucleation of Low‐Density Polymorphs**
نویسندگان
چکیده
New polymorphs β and γ of bis-3-nitrophenyl disulphide, crystallized above 0.3 GPa, are less dense than the ambient-pressure polymorph α. This counterintuitive density relation results from high-entropy nucleation subsequent kinetic crystallization. The work performed by pressure compensates high entropy temperature product, substantiated in varied conformers increased chemical potential. Pressure-increased viscosity promotes polymorphs, accordance with empirical Ostwald's rule stages. It contrasts to mechanochemical techniques, favouring high-density polymorphs.
منابع مشابه
Polymorphs, Proteins, and Nucleation Theory: A Critical Analysis
Over the last eight years new theories regarding nucleation, crystal growth, and polymorphism have emerged. Many of these theories were developed in response to observations in nature, where classical nucleation theory failed to account for amorphous mineral precursors, phases, and particle assembly processes that are responsible for the formation of invertebrate mineralized skeletal elements, ...
متن کاملNucleation of crystals that are mixed composites of all three polymorphs in the Gaussian core model.
We present results of computer simulations of homogeneous crystal nucleation in the Gaussian core model. In our simulations, we study the competition between the body-centered-cubic (bcc), face-centered-cubic (fcc), and hexagonal-close-packed crystal phases. We find that the crystal nuclei that form from the metastable fluid phase are typically "mixed"; they do not consist of a single crystal p...
متن کاملHighpressure phases of NaAlH4 from first principles
Related Articles Influence of monovalent ions on density fluctuations in hydrothermal aqueous solutions by small angle X-ray scattering J. Chem. Phys. 136, 044515 (2012) Nanoscale diffraction imaging of the high-pressure transition in Fe1−xO Appl. Phys. Lett. 100, 041903 (2012) High-pressure study of tetramethylsilane by Raman spectroscopy J. Chem. Phys. 136, 024503 (2012) High-pressure optical...
متن کاملHighPressure Equation of State for NaCl, KCl, and CsCl
Articles you may be interested in Electric conductivities of 1:1 electrolytes in liquid methanol along the liquid–vapor coexistence curve up to the critical temperature. A calculation of the equation of state for NaCl from a Mie-Grlineisen equation was repeated using more accurate values of the zero-pressure compressibility. It was also extended to KCl and CsCl. An analysis of this approach to ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Chemistry: A European Journal
سال: 2021
ISSN: ['0947-6539', '1521-3765']
DOI: https://doi.org/10.1002/chem.202005121