Download or read book Pressure induced Phase Transitions in Select Molybdates and Tungstates written by Paul Robert Scott and published by . This book was released on 2013 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mao-Bell and symmetric diamond anvil cells were used to study the effect of high-pressure on a series of tungstate and molybdate compounds. The experimental techniques of powder x-ray diffraction and Raman spectroscopy were employed to gain an understanding of the observed phase transitions. Bi2MoO6, exhibited a phase transition at ~6.8 GPa that was observed by a stiffening of its bulk modulus from 51 GPa, for the low-pressure phase, to 141.5 GPa for the high-pressure phase. Bi2W2O9 exhibited a phase transition at ~11 GPa that was observed by a change in the x-ray diffraction pattern. Bi2WO6 exhibited a phase transition between ~4.8 GPa and 8.3 GPa that was observed by a stiffening of its bulk modulus from 52.2 GPa, for the low-pressure phase, to 121.8 GPa for the high-pressure phase. La2Mo4O15 exhibited two phase transitions one at 2 GPa and another at 17 GPa. The transition at 2 GPa was observed as a change in the x-ray diffraction pattern and has yet to be identified. The transition at 17 GPa was to a glassy, pressure-induced amorphization, state. Sm2Mo4O15 exhibited a phase transition at 5.4 GPa. This transition was observed as a change in the x-ray diffraction pattern and has yet to be identified. MgNb2O6 exhibited a phase transition at 10.3 GPa. This transition was observed in both x-ray diffraction and Raman spectroscopy. KNbW2O9 exhibited no signs of a phase change up to a pressure of 35 GPa.
Download or read book Pressure Induced Phase Transformations Volume II written by Daniel Errandonea and published by Mdpi AG. This book was released on 2023-08-25 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of phase transitions in materials under high pressure and high temperature is a very active research field. In the last few decades, many important discoveries have been made thanks to the development of experimental techniques and computer simulation methods. Many of these achievements affect various research fields ranging from solid-state physics, chemistry, and materials science to geophysics. They not only involve deepening knowledge on solid-solid phase transitions, but also a better understanding of melting under compression. These modern discoveries, as well as the impact of pressure on structural, chemical, and physical properties, are central to the current Special Issue. Amongst other topics, it places particular emphasis on phase transitions and their effects on different physical properties.
Download or read book Pressure induced Phase Transitions written by Andrzej Grzechnik and published by . This book was released on 2007-01-01 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pressure Induced Phase Transformations written by Daniel Errandonea and published by . This book was released on 2020-09-04 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue of Crystals entitled Pressure-Induced Phase Transformations. It includes selected articles on the behavior of matter under high-pressure and high-temperature conditions, describing and discussing contemporary achievements, which were selected based on their relevance and scientific quality.
Download or read book Pressure Induced Phase Transitions in AB2X4 Chalcogenide Compounds written by Francisco Javier Manjon and published by Springer. This book was released on 2014-02-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book on pressure-induced phase transitions in AB2X4 chalcogenide compounds deals with one important AmBnXp material. The interest in these materials is caused by their properties. The results are discussed for three main groups of structural families: cubic-spinel structures, defective tetragonal structures, and other structures like layered and wurtzite-type modifications. A systematic analysis of the behavior of cubic (spinel), tetragonal (defect chalcopyrites and stannites) and other crystal modifications of AB2X4 compounds under hydrostatic pressure is performed. The behavior of AIIAl2S4, AIIGa2S4, AIIAl2Se4 and AIIGa2Se4 compounds with defective tetragonal structures, compounds with layered and wurtzite structures under hydrostatic pressure and the pressure dependence of the band gap, lattice parameters, interatomic distances, vibrational modes and pressure-induced phase transitions is discussed. Many of these compounds, except oxide spinels, undergo a pressure-induced phase transition towards the rocksalt-type structure. The phase transition is preceded by disorder in the cation sublattice. The dependence of the transition pressure to the rocksalt-type structure as a function of the compound ionicity and the size criterion is analyzed. At high pressures, all ordered-vacancy compounds are found to exhibit a band anticrossing between several conduction bands that leads to a strong decrease of its pressure coefficient and consequently to a strong non-linear pressure dependence of the direct bandgap energy. Theoretical studies of phase transitions in several ordered-vacancy compounds reveal that the existence of ordered vacancies alter the cation-anion bond distances and their compressibilities. The book is written for students, Ph D. students and specialists in materials science, phase transitions and new materials.
Download or read book Towards the Control of Thermal Expansion From 1996 to Today written by Andrea Sanson and published by Frontiers Media SA. This book was released on 2019-08-08 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book BTL Talks and Papers written by Bell Telephone Laboratories, inc. Technical Information Libraries and published by . This book was released on 1971 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1993 with total page 1058 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications written by United States. National Bureau of Standards and published by . This book was released on 1978 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1972 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalog of National Bureau of Standards Publications 1966 1976 written by United States. National Bureau of Standards and published by . This book was released on 1978 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the National Bureau of Standards Catalog written by United States. National Bureau of Standards and published by . This book was released on 1978 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalog of National Bureau of Standards Publications 1966 1976 pt 1 Citations and abstracts v 2 pt 1 Key word index A through L v 2 pt 2 Key word index M through Z written by United States. National Bureau of Standards. Technical Information and Publications Division and published by . This book was released on 1978 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1969 with total page 1184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2720 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book INIS Atomindeks written by and published by . This book was released on 1985 with total page 1532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
