High Pressure Study of Ru3(CO)12by X-ray Diffraction, Raman, and Infrared Spectroscopy

2004 ◽  
Vol 43 (17) ◽  
pp. 5245-5252 ◽  
Author(s):  
Carla Slebodnick ◽  
Jing Zhao ◽  
Ross Angel ◽  
Brian E. Hanson ◽  
Yang Song ◽  
...  
Keyword(s):  
High Pressure ◽  
Infrared Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Raman And Infrared Spectroscopy ◽  
High Pressure Study

High-pressure study of a nanostructured SnSe1−xSx (x = 0.5) solid solution by in-situ X-ray diffraction and ab-initio calculations

2019 ◽  
Vol 792 ◽  
pp. 536-542
Author(s):  
Larissa da Silva Marques ◽  
Joelma Maria de Oliveira Ferreira ◽  
Querem Hapuque Félix Rebelo ◽  
Angsula Ghosh ◽  
Daniela Menegon Trichês ◽  
...  
Keyword(s):  
Solid Solution ◽  
High Pressure ◽  
Ab Initio Calculations ◽  
Ab Initio ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Pressure Study

Synthèse et caractérisation des oxypentafluorouranates(VI) NH4UOF5, KUOF5, RbUOF5 et CsUOF5

1978 ◽  
Vol 56 (14) ◽  
pp. 1874-1880 ◽  
Author(s):  
Philippe Joubert ◽  
Roland Bougon ◽  
Bernard Gaudreau
Keyword(s):  
Infrared Spectroscopy ◽  
Solid State ◽  
Alkali Metal ◽  
Vibrational Spectroscopy ◽  
Uranium Atom ◽  
The Other ◽  
Metal Fluoride ◽  
X Ray Diffraction ◽  
X Ray ◽  
Raman And Infrared Spectroscopy

The oxypentafluorouranates(VI) MUOF5, where M = NH4, K, Rb, Cs, have been synthetized from reaction of UOF4 with the ammonium or corresponding alkali metal fluoride in liquid SO2. According to X-ray diffraction, Raman and infrared spectroscopy, and from an isomorphism with the corresponding hexafluorouranates(V) MUF6, two different environments around the uranium atom are observed. In CsUOF5 the five fluorine atoms and the oxygen around the uranium result in a pseudo-octahedral surrounding whereas for the other complexes (M = NH4, K, Rb) each uranium is surrounded by eight light atoms forming a dodecahedron. In this structure the dodecahedra are linked together by fluorine atoms to form infinite chains. The UOF5− ion has been characterized by vibrational spectroscopy in the solid state. The proposed assignment, which was made with the assumption of a C4v symmetry of the UOF5− ion, was confirmed by a force constant calculation. From these data and contrary to the values reported for comparable oxypentafluoroanions, the axial fluorine is found to be less ionic than the equatorial ones.

Synchrotron X-ray Diffraction and Infrared Spectroscopy Studies of C60H18under High Pressure

2010 ◽  
Vol 1 (4) ◽  
pp. 714-719 ◽  
Author(s):  
Honglei Ma ◽  
Xuemei Zhang ◽  
Bingbing Liu ◽  
Quanjun Li ◽  
Qifeng Zeng ◽  
...  
Keyword(s):  
High Pressure ◽  
Infrared Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Spectroscopy Studies

X-ray diffraction study of HgBa2CuO4+δ at high pressures

1997 ◽  
Vol 12 (2) ◽  
pp. 106-112
Author(s):  
Eduardo J. Gonzalez ◽  
Winnie Wong-Ng ◽  
Gasper J. Piermarini ◽  
Christian Wolters ◽  
Justin Schwartz
Keyword(s):  
High Pressure ◽  
Bulk Modulus ◽  
Pressure Range ◽  
High Pressures ◽  
Anisotropy Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Anisotropic Elastic ◽  
High Pressure Study

An in situ high pressure study using energy dispersive X-ray diffraction has been carried out on the polycrystalline high-Tc superconductor, HgBa2CuO4+δ (Hg-1201), to study its phase stability under pressure and also to measure its compressibility and bulk modulus. No evidence of pressure-induced polymorphism was found in the pressure range investigated, i.e., from 0.1 MPa (1 atm) to 5 GPa. The compound exhibited anisotropic elastic properties. The axial compressibility along the c axis was measured to be (3.96±0.35)×10−3GPa−1 and along the a axis (3.42±0.13)×10−3GPa−1, corresponding to an anisotropy ratio of 1.16±0.11. The bulk modulus was determined to be (94.7±4.2) GPa and, assuming a Poisson's ratio of 0.2, Young's modulus was estimated to be (170±8) GPa.

Synthesis, Characterization, Crystal Structure and hybrid DFT Computation of the Chlorooxoarsenate(III), [NMe4]2[As4O2Cl10]·2 CH3CN

2001 ◽  
Vol 56 (3) ◽  
pp. 301-305 ◽  
Author(s):  
Thomas M. Klapötke ◽  
Thomas Schütt
Keyword(s):  
Crystal Structure ◽  
Infrared Spectroscopy ◽  
Normal Modes ◽  
Nbo Analysis ◽  
Crystallographic Data ◽  
Computational Results ◽  
X Ray Diffraction ◽  
Aerobic Conditions ◽  
X Ray ◽  
Raman And Infrared Spectroscopy

Abstract [NMe4]2 [As4O2Cl10] · 2 CH3CN was recovered by the reaction of [NMe4][N3] with AsCl3 in CH3CN under aerobic conditions. This compound was also obtained directly by the reaction of AsCl3, AS2O3 and [NMe4][Cl] in acetonitrile. The structure was determined by X-ray diffraction. [NMe4]2 [As4O2Cl10] · 2 CH3CN crystallizes in theoorthorhombic space group Fmmm with a = 11.4144(8), b = 14.732(1) and c = 19.803(2) Å, with 4 formula units per unit cell. The frequencies obtained by Raman and infrared spectroscopy were assigned to the normal modes of the [As4O2Cl10]2- anion in comparison with computational results. The bonding situation in the [As4O2Cl10]2- anion was elucidated on the basis of an NBO analysis on the crystallographic data.

High-Pressure Study of Oxo-bridged Mixed-Valent MnIII/MnIV Dimers High-Pressure Study of Oxo-bridged Mixed-Valent MnIII/MnIV Dimers

2010 ◽  
Vol 65 (3) ◽  
pp. 221-230 ◽  
Author(s):  
Alessandro Prescimone ◽  
Javier Sanchez-Benitez ◽  
Konstantin V. Kamenev ◽  
John E. Warren ◽  
Alistair R. Lennie ◽  
...  
Keyword(s):  
High Pressure ◽  
Hydrostatic Pressure ◽  
Single Crystal ◽  
Magnetic Behaviour ◽  
Squid Magnetometry ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Bond Lengths ◽  
High Pressure Study

A combination of high-pressure single crystal X-ray diffraction and high-pressure SQUID magnetometry has been used to study two oxo-bridged mixed-valent MnIII/MnIV dimers. [Mn2O2(bpy)4](ClO4)3·3CH3CN, (1·3CH3CN; bpy = 2,2ʹ-bipyridine) has been compressed to 2.0 GPa whilst [Mn2O2(bpy)4](PF6)3·2CH3CN·1H2O, (2·2CH3CN·1H2O) could be measured crystallographically up to 4.55 GPa. The PF6 salt of [Mn2O2(bpy)4]3+ has never been reported before while 1 has been reported as a hydrate and in a different crystallographic space group. The application of hydrostatic pressure imposes significant distortions and modifications in the structures of both complexes. In particular, in complex 1·3CH3CN the Mn-Mn separation is reduced by the contraction of some of the Mn-O bond lengths, whilst in 2·2CH3CN·1H2O the Mn-O-Mn bridging angles and the Mn-O bond lengths are substantially unchanged. Interestingly 2·2CH3CN·1H2O also shows a constant contraction in nearly all the Mn-N bonds. The magnetic behaviour of the complexes has been measured up to 0.87 GPa for 1·3CH3CN and 0.84 GPa for 2·2CH3CN·1H2O.

scholarly journals Yttrium orthoferrite powder obtained by the mechanochemical synthesis

2017 ◽  
Vol 49 (3) ◽  
pp. 277-284 ◽  
Author(s):  
Zorica Lazarevic ◽  
Cedomir Jovalekic ◽  
Martina Gilic ◽  
Valentin Ivanovski ◽  
Ana Umicevic ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Crystallite Size ◽  
Mechanochemical Synthesis ◽  
Ball Mill ◽  
Room Temperature ◽  
Average Crystallite Size ◽  
X Ray Diffraction ◽  
X Ray ◽  
Yttrium Orthoferrite ◽  
Raman And Infrared Spectroscopy

Yttrium orthoferrite (YFeO3) powder was prepared by a mechanochemical synthesis from a mixture of Y2O3 and ?-Fe2O3 powders in a planetary ball mill for 2.5 h. The obtained YFeO3 powder sample was characterized by X-ray diffraction (XRD), Raman and infrared spectroscopy. The average crystallite size calculated by the Scherrer equation was 12 nm. The M?ssbauer spectroscopy at room temperature confirms the superparamagnetic character of YFeO3 orthoferrite sample.

scholarly journals High pressure study of nitrogen doped carbon nanotubes using Raman spectroscopy and synchrotron X-ray diffraction

2020 ◽  
Vol 13 (1) ◽  
pp. 3008-3016 ◽  
Author(s):  
Weiguang Shi ◽  
Hao Liu ◽  
Zhaohui Dong ◽  
Zhongying Mi ◽  
Sean R. Shieh ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
High Pressure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon ◽  
High Pressure Study
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