Thermal expansion and crystal structure of FeSi between 4 and 1173 K determined by time-of-flight neutron powder diffraction

2002 ◽  
Vol 29 (2) ◽  
pp. 132-139 ◽  
Author(s):  
L. Vočadlo ◽  
K. S. Knight ◽  
G. D. Price ◽  
I. G. Wood
Keyword(s):  
Crystal Structure ◽  
Thermal Expansion ◽  
Powder Diffraction ◽  
Time Of Flight ◽  
Neutron Powder Diffraction

Crystal Structure of La4Si2O7N2Analyzed by the Rietveld Method Using the Time-of-Flight Neutron Powder Diffraction Data

2003 ◽  
Vol 15 (5) ◽  
pp. 1099-1104 ◽  
Author(s):  
Junichi Takahashi ◽  
Hisanori Yamane ◽  
Naoto Hirosaki ◽  
Yoshinobu Yamamoto ◽  
Takayuki Suehiro ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Rietveld Method ◽  
Time Of Flight ◽  
Neutron Powder Diffraction ◽  
Powder Diffraction Data ◽  
Neutron Powder Diffraction Data

scholarly journals Lattice Thermal Expansion Effects in Pure and Doped Cordierite by Time-of-Flight Neutron Diffraction*

1985 ◽  
Vol 29 ◽  
pp. 173-184 ◽  
Author(s):  
F. K. Predecki ◽  
J. Haas ◽  
J. Faber ◽  
R. L. Hitterman
Keyword(s):  
Thermal Expansion ◽  
Neutron Diffraction ◽  
Powder Diffraction ◽  
Rietveld Method ◽  
Time Of Flight ◽  
Neutron Powder Diffraction ◽  
Lattice Thermal Expansion ◽  
Space Group ◽  
Thermal Expansion Behavior ◽  
Expansion Behavior

AbstractThe thermal expansion behavior of pure, Ge-doped and Li-doped hexagonal cordierites with respective compositions: 2MgO 2Al2O3 5Si02 2Mg0 2Al2O3 4Si02 Ge02) and 2MgO (2+x)AL203 (5-2x)Si02 xLi20 with x = .174, was investigated using time-of-flight neutron powder diffraction at temperatures from 22 to 750°C in vacuum. The data were refined in space group P6/mcc using the Rietveld method. The lattice thermal expansion curves of all 3 samples were quite similar. The negative axis expansion is associated with (1)displacement of the T2 cations generally toward the axis channels and (2) changes in the distortion of the coupled T1/M tetrahedra/octahedra in the structure. Both contributions were present in all 3 samples but the first was more dominant in the Ge doped sample. The nature and origin of the distortions in T1 and M are discussed.

ChemInform Abstract: Crystal Structure of Lu4Si2O7N2 Analyzed by the Rietveld Method Using the Time-of-Flight Neutron Powder Diffraction Pattern.

ChemInform ◽  
2010 ◽  
Vol 33 (46) ◽  
pp. no-no
Author(s):  
Junichi Takahashi ◽  
Hisanori Yamane ◽  
Masahiko Shimada ◽  
Yoshinobu Yamamoto ◽  
Naoto Hirosaki ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Rietveld Method ◽  
Time Of Flight ◽  
Neutron Powder Diffraction ◽  
Neutron Powder Diffraction Pattern

Crystal Structure of La4Si2O7N2 Analyzed by the Rietveld Method Using the Time-of-Flight Neutron Powder Diffraction Data.

ChemInform ◽  
2003 ◽  
Vol 34 (22) ◽  
Author(s):  
Junichi Takahashi ◽  
Hisanori Yamane ◽  
Naoto Hirosaki ◽  
Yoshinobu Yamamoto ◽  
Takayuki Suehiro ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Rietveld Method ◽  
Time Of Flight ◽  
Neutron Powder Diffraction ◽  
Powder Diffraction Data ◽  
Neutron Powder Diffraction Data

H/D isotope effect on the molar volume and thermal expansion of benzene

2018 ◽  
Vol 20 (24) ◽  
pp. 16736-16742 ◽  
Author(s):  
A. D. Fortes ◽  
S. C. Capelli
Keyword(s):  
Thermal Expansion ◽  
Molar Volume ◽  
Isotope Effect ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Time Of Flight ◽  
Neutron Powder Diffraction ◽  
Powder Diffraction Data ◽  
Neutron Powder Diffraction Data ◽  
Invariant Volume

Time-of-flight neutron powder diffraction data have been collected from C6H6 and C6D6 between 10 and 276 K, revealing no cross-over in their molar volumes and an almost temperature invariant volume-isotope-effect, in contrast with previously published work.

scholarly journals Thermal expansion and crystal structure of cementite, Fe3C, between 4 and 600 K determined by time-of-flight neutron powder diffraction

2004 ◽  
Vol 37 (1) ◽  
pp. 82-90 ◽  
Author(s):  
I. G. Wood ◽  
Lidunka Vočadlo ◽  
K. S. Knight ◽  
David P. Dobson ◽  
W. G. Marshall ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Expansion ◽  
Powder Diffraction ◽  
Coefficient Of Thermal Expansion ◽  
Mean Field Theory ◽  
Mean Field ◽  
Neutron Powder Diffraction ◽  
Ferromagnetic Phase ◽  
Ferromagnetic Phase Transition ◽  
Full Temperature

The cementite phase of Fe3C has been studied by high-resolution neutron powder diffraction at 4.2 K and at 20 K intervals between 20 and 600 K. The crystal structure remains orthorhombic (Pnma) throughout, with the fractional coordinates of all atoms varying only slightly (the magnetic structure of the ferromagnetic phase could not be determined). The ferromagnetic phase transition, withTc≃ 480 K, greatly affects the thermal expansion coefficient of the material. The average volumetric coefficient of thermal expansion aboveTcwas found to be 4.1 (1) × 10−5 K−1; belowTcit is considerably lower (< 1.8 × 10−5 K−1) and varies greatly with temperature. The behaviour of the volume over the full temperature range of the experiment may be modelled by a third-order Grüneisen approximation to the zero-pressure equation of state, combined with a magnetostrictive correction based on mean-field theory.

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