Structural investigation of TS-1: determination of the true nonrandom titanium framework substitution and silicon vacancy distribution from powder neutron diffraction studies using isotopes
Article Abstract:
Constant wavelength powder neutron diffraction data collected on isotopically substituted titanium silicate samples with a Si:Ti molar ratio of 39:1 are studied using a combination of single and multiple data set, exploiting the scattering length contrast between the different titanium isotopes and silicon. The power of isotopic substitution in powder neutron diffraction experiments to yield enhanced structural information in complex systems is described.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
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An analysis of the thermal motion in the negative thermal expansion material Sc2(WO4)3 using isotopes in neutron diffraction
Article Abstract:
Study of thermal motion is carried out for the negative thermal expansion material Sc2(WO4)3 over the temperature range 50-823 K. Results of the study reveal that the thermal motion of two Sc-O-W bridging oxygen atoms with the largest Sc-O-W angles is better represented by thermal toroids consistent with strong local motion of these units.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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Quantum sieving in single-walled carbon nanotubes: Effect of interaction potential and rotational-transnational coupling
Article Abstract:
The selective adsorption of heavy isotopes in narrow nanotubes, known as quantum sieving, is studied using a simple approximation theory for several different potential models. The selectivities are very sensitive to changes in the atomic diameter parameter and less sensitive to changes in the potential well depth.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
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- Abstracts: An exploration of theoretical and experimental electron density distributions and SiO bonded interactions for the silica polymorph coesite
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