Journal ArticleDOI
Crystal Structure of β-CuI
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In this article, the crystal structure of β-CuI at 400°C has been refined from powder crystal X-ray diffraction data, which includes the ordered arrangement of Cu + ions surrounded by tetrahedra of I - ions.Abstract:
The crystal structure of β-CuI at 400°C has been refined from powder crystal X-ray diffraction data. The crystal belongs to the trigonal system with the space group C 1 3v -P3m1, and has lattice constants of a =4.279±0.002 A, c =7.168±0.007 A. The low temperature phase of solid electrolytes is often of tetrahedral structure such as zinc-blende or wurtzite. The structure of the β-CuI includes the ordered arrangement of Cu + ions surrounded by tetrahedra of I - ions.read more
Citations
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Structure and dynamics of solid state ionics
TL;DR: In this article, solid state ionics are classified according to the characteristic feature of their structures, and various types of structures are explained in detail, in particular, the anharmonic thermal vibration of mobile ions studied by X-ray and neutron diffraction is dealt with as an important characteristic of the solid-state ionics.
Journal ArticleDOI
Determination of the structure of beta -CuI by high-resolution neutron powder diffraction
TL;DR: The structure of the hexagonal hexagonal beta form of copper iodide has been investigated in this article, where the high quality of the diffraction data has allowed the corrected structure for beta -CuI to be determined in space group P3m1.
Journal ArticleDOI
Nanophases in mechanochemically synthesized AgI–CuI system: structure, phase stability and phase transitions
D. Bharathi Mohan,C.S. Sunandana +1 more
TL;DR: In this article, a soft mechanochemical reaction (MCR) of Ag, Cu and I was used to synthesize nanoscale crystallites of Ag-rich (Ag1−xCuxI, x=0.05, 0.15 and 0.25) and intermediate Ag1-xI (x= 0.50) solid solutions and end members AgI, CuI with sizes in the range of 46-13 nm.
Journal ArticleDOI
Toward Exotic Layered Materials: 2D Cuprous Iodide
TL;DR: In this paper , a stable 2D structure of copper and iodine, a material that normally only occurs in layered form at elevated temperatures between 645 and 675 K, is produced.
Journal ArticleDOI
Structural characterization of further high temperature superionic phases of Ag2HgI4 and Cu2HgI4
Steve Hull,D. A. Keen,D. A. Keen +2 more
TL;DR: In this article, the crystal structure of the δ phases comprises a slightly distorted h.c.p. anion sublattice with the two cation species dynamically disordered over the octahedral and tetrahedral interstices.
References
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Journal ArticleDOI
On the Phase Transition in Cuprous Iodide
TL;DR: In this paper, the phase transition and crystal structures of cuprous iodide (CuI) have been studied by the X-ray and calorimetric measurement two phase transitions at 369°C and 407°C were found and the corresponding energy and entropy changes were estimated from the specific heattemperature curve.
Journal ArticleDOI
Crystal structure of high-temperature cuprous iodide and cuprous bromide
W. Bührer,W. Hälg +1 more
TL;DR: In this article, the crystal sturcture of the high temperature modifications have been determined be elastic neutron scattering experiments on powdered samples, which can be summarized as follows: on the basis of these structural data, the different behavior of the ionic conductivity of CuI and CuBr at high temperature can be understood.
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Distribution and anharmonic thermal vibration of cations in α-AgI
TL;DR: In this paper, the cation distribution in the superionic conductor α-AgI has been re-examined using neutron as well as X-ray diffraction data, and a least squares analysis shows that the experimental data are very well explained by a structure model in which two silver ions are distributed over 12(d) sites of the space group Im3m with large asymmetric anharmonic thermal vibrations.
Journal ArticleDOI
Note on the Phase Transition in CuI
TL;DR: In this article, the α-β-γ transitions observed in CuI are interpreted in terms of anharmonic oscillation of Cu ion, and strong temperature dependence of the Debye-Waller factor and large anomalous entropy are correlated consistently within the proposed model.