Energy dispersive in situ high pressure study of stoichiometric and non-stoichiometric rare earth coppersilicides

Physica B+C ◽  
1986 ◽  
Vol 139-140 ◽  
pp. 449-452 ◽  
Author(s):  
I.L. Spain ◽  
F. Steglich ◽  
U. Rauchschwalbe ◽  
H.D. Hochheimer
Keyword(s):  
High Pressure ◽  
Rare Earth ◽  
Energy Dispersive ◽  
High Pressure Study

In-situ high-pressure study of the ordered phase of ethyl propionate

2007 ◽  
Vol 63 (1) ◽  
pp. 111-117 ◽  
Author(s):  
Roman Gajda ◽  
Andrzej Katrusiak
Keyword(s):  
High Pressure ◽  
Degrees Of Freedom ◽  
Molecular Volume ◽  
Ethyl Propionate ◽  
Intermolecular Contacts ◽  
High Pressure Study ◽  
Pressure Phase ◽  
Three Degrees Of Freedom ◽  
Volume Difference

Ethyl propionate, C5H10O2 (m.p. 199 K), has been in-situ pressure-frozen and its structure determined at 1.34, 1.98 and 2.45 GPa. The crystal structure of the new high-pressure phase (denoted β) is different from phase α obtained by lowering the temperature. The freezing pressure of ethyl propionate at 296 K is 1.03 GPa. The molecule assumes an extended chain s-trans–trans–trans conformation, only slightly distorted from planarity. The closest intermolecular contacts in both phases are formed between carbonyl O and methyl H atoms; however, the ethyl-group H atoms in phase β form no contacts shorter than 2.58 Å. A considerable molecular volume difference of 24.2 Å3 between phases α and β can be rationalized in terms of degrees of freedom of molecules arranged into closely packed structures: the three degrees of freedom allowed for rearrangements of molecules confined to planar sheets in phase α, but are not sufficient for obtaining a densely packed pattern.

High-Pressure Study of the Anomalous Rare-Earth TernariesEu1.2Mo6S8andEu1.2Mo6Se8

1981 ◽  
Vol 46 (4) ◽  
pp. 276-279 ◽  
Author(s):  
C. W. Chu ◽  
S. Z. Huang ◽  
C. H. Lin ◽  
R. L. Meng ◽  
M. K. Wu ◽  
...  
Keyword(s):  
High Pressure ◽  
Rare Earth ◽  
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

In situ high-pressure study of FeP: Implications for planetary cores

2011 ◽  
Vol 184 (3-4) ◽  
pp. 154-159 ◽  
Author(s):  
Tingting Gu ◽  
Xiang Wu ◽  
Shan Qin ◽  
Leonid Dubrovinsky
Keyword(s):  
High Pressure ◽  
Planetary Cores ◽  
High Pressure Study

The effect of high external pressure on the structure and stability of MOF α-Mg3(HCOO)6 probed by in situ Raman and FT-IR spectroscopy

2015 ◽  
Vol 3 (22) ◽  
pp. 11976-11984 ◽  
Author(s):  
Haiyan Mao ◽  
Jun Xu ◽  
Yue Hu ◽  
Yining Huang ◽  
Yang Song
Keyword(s):  
High Pressure ◽  
Ir Spectroscopy ◽  
Vibrational Spectroscopy ◽  
External Pressure ◽  
Structural Transitions ◽  
In Situ Raman ◽  
Ft Ir ◽  
High Pressure Study ◽  
Ft Ir Spectroscopy

A first high-pressure study on MOF α-Mg3(HCOO)6 probed by in situ vibrational spectroscopy revealed strongly contrasting host-dependent structural transitions and stabilities.

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.

scholarly journals In-situ X-ray Observation of Synthesizing Process for Rare-earth Transition-metal Pnictides under High Temperature and High Pressure

2018 ◽  
Author(s):  
Chihiro Sekine ◽  
◽  
Hidetoshi Osanai ◽  
Keisuke Ikemori ◽  
Ryosuke Nakajima ◽  
...  
Keyword(s):  
High Pressure ◽  
Rare Earth ◽  
High Temperature ◽  
Transition Metal ◽  
X Ray

Effects of High Pressure on Structural Evolution of Polyurea: An In-Situ Energy Dispersive X-Ray Diffraction Study

2021 ◽  
Author(s):  
Tyler Eastmond ◽  
Jing Hu ◽  
Vahidreza Alizadeh ◽  
Jay Oswald ◽  
Alireza Vakil Amirkhizi ◽  
...  
Keyword(s):  
High Pressure ◽  
Diffraction Study ◽  
Structural Evolution ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
X Ray
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