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Crystal structure and a new phase transition of (ND4)3D(SO4)2 in high temperature phase

โœ Scribed by T Fukami; H Ninomiya; R.H Chen

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
491 KB
Volume
98
Category
Article
ISSN
0167-2738

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โœฆ Synopsis

Electric conductivity and X-ray diffraction measurements are performed on deuterated triammonium hydrogen disulphate (ND ) D(SO ) in high temperature phase. A new structural phase transition that corresponds to the transition at 463 K of 4 3 4 2 (NH ) H(SO ) is found at 413 K. The space group symmetry (monoclinic C2) and the crystal structure of (ND ) D(SO ) 4 3 4 2 4 3 4 2 are determined at 404 K in phase I. The electric conductivity due to the deuterium ion migration in phase I is discussed with respect to the results of the structure refinement.

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High-Temperature Structural Phase Transi
High-Temperature Structural Phase Transition of K2SO4 and K2SeO4 Crystals Studied by X-Ray Diffraction
โœ T.M. Chen; R.H. Chen ๐Ÿ“‚ Article ๐Ÿ“… 1994 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 476 KB

High-temperature structural phase transitions in \(\mathrm{K}_{2} \mathrm{SO}_{4}\) and \(\mathrm{K}_{2} \mathrm{SeO}_{4}\) crystals have been studied by \(\mathrm{X}\)-ray diffraction. Laue and precession photographs were taken with Mo radiation at several high temperatures. Results indicate that t