Phase III of CD4: Reconciliation of inelastic neutron scattering and heat capacity measurements of rotational tunneling levels

1982 ◽  
Vol 77 (3) ◽  
pp. 1610-1611 ◽  
Author(s):  
M. A. White
Keyword(s):  
Heat Capacity ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Phase Iii ◽  
Heat Capacity Measurements

Inelastic neutron scattering and heat capacity studies of ferromagnetic PrInNi4

2006 ◽  
Vol 385-386 ◽  
pp. 41-43 ◽  
Author(s):  
H.C. Walker ◽  
K.A. McEwen ◽  
D.T. Adroja ◽  
J.-G. Park ◽  
Y.S. Kwon ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron

NH3 reorientation in phases I, II, and III of Ni(NH3)6(NO3)2

1988 ◽  
Vol 66 (4) ◽  
pp. 692-697 ◽  
Author(s):  
Gordon J. Kearley ◽  
Herma Blank
Keyword(s):  
Phase Transition ◽  
Neutron Scattering ◽  
Strong Interaction ◽  
Rotational Motion ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Phase Iii ◽  
Single Type ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering

The inelastic neutron scattering (INS) spectra of rotational tunnelling and librations of NH3 ligands in phase III of Ni(NH3)6(NO3)2 are not consistent with a rotational hindrance potential containing only cos [Formula: see text] terms owing to strong interaction between neighboring cations. This type of interaction, and motion of the whole cation, also influences the classical reorientational motions involving displacement of the H atoms, where the overall radius of rotation is consistently greater than the 0.9 Å expected for isolated NH3 rotors. Quasielastic neutron scattering (QNS) suggests that in phase III there are two sublattices of cations, one of which becomes completely disordered (with respect to the NH3 rotors) at the III–II phase transition. Disorder of the second sublattice marks the II–I transformation where only a single type of rotational motion is found.

Molecular Vibrations as the Origin of Solid State Effects in Borohydrides

2009 ◽  
Vol 1216 ◽  
Author(s):  
Andreas Borgschulte ◽  
Robin Gremaud ◽  
Florian Buchter ◽  
Zbigniew Lodziana ◽  
Andreas Züttel ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Solid State ◽  
Thermodynamic Properties ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Vibrational Properties ◽  
Vibrational Modes ◽  
The Impact ◽  
Specific Phase

AbstractIn this proceeding, we discuss measurements of the vibrational properties of hydrides using inelastic neutron scattering (INS) and the impact of the vibrational modes on the thermodynamic properties. We compare the heat capacity of PdH0.63 and LiBH4 as measured calorimetrically to that derived form INS spectra. We show that the vibrational properties of Ca(BH4)2 depend on the specific phase and hitherto determine their stability.

Spin gap inCeFe4Sb12studied by heat capacity and inelastic neutron scattering

2007 ◽  
Vol 76 (17) ◽  
Author(s):  
R. Viennois ◽  
L. Girard ◽  
L. C. Chapon ◽  
D. T. Adroja ◽  
R. I. Bewley ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Spin Gap

Measurements of inelastic neutron scattering and specific heat capacity of CeCu5

1987 ◽  
Vol 64 (12) ◽  
pp. 1473-1477 ◽  
Author(s):  
E.A. Goremychkin ◽  
I. Natkaniec ◽  
E. Mühle ◽  
H. Müller ◽  
P. Frach
Keyword(s):  
Heat Capacity ◽  
Neutron Scattering ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron

Anomalous vibrational modes in acetanilide as studied by inelastic neutron scattering

1992 ◽  
Vol 2 (10) ◽  
pp. 1929-1939 ◽  
Author(s):  
Mariette Barthes ◽  
Juegen Eckert ◽  
Susanna W. Johnson ◽  
Jacques Moret ◽  
Basil I. Swanson ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Vibrational Modes
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