Hydrides inelastic neutron scattering

CCD = charge-coupled device IHIs = interligand hypervalent interactions ILL = Institut Lane-Langevin INS = inelastic neutron scattering IPNS = intense pulsed neutron source LINAC = linear accelerator MaNDi=macro-molecular neutron diffractometer NiMH=nickel-metal OPAL = open pool Australian light-water reactor hydride SANS = small-angle neutron scattering SNS = spallation neutron source. 

G. Auffermann, G. Barrera, D. Colognesi, G. Corradi, A.J. Ramirez-Cuesta M. Zoppi (2004). J. Phys. C Condens. Matter, 16, 5731-5743. Hydrogen dynamics in heavy alkali metal hydrides obtained through inelastic neutron scattering. 

W. C-K. Poon, P. Dallin, B.F.G. Johnson, E.A. Marseglia J. Tomkinson (1990). Polyhedron, 9, 2759-2761. Inelastic neutron scattering study of hydride ligands in [(H2-H)20s3(CO)io] evidence for a direct H-H interaction. 

J. Eckert, A. Albinati G. Longoni (1989). Inorg. Chem., 28, 4055-4056. Inelastic neutron scattering study of K[HCo6(CO)i5] implications for location of the hydride. 

H.N. Bordallo, A.I. Kolesnikov, A.V. Kolomiets, W. Kalceff, H. Nakotte J. Eckert (2003). J. Phys. Condens. Matter, 15, 2551-2559. Inelastic neutron scattering studies of TbNiAlHi,4 and UNiAlH2 hydrides. 

H.G. Schimmel, M.R. Johnson, G.J. Kearley, A.J. Ramirez-Cuesta, J. Huot F.M. Mulder (2004). Materials Science and Engineering B-Solid State Materials for Advanced Technology, 108, 38-41. The vibrational spectrum of magnesium hydride from inelastic neutron scattering and density functional theory. 

Inelastic neutron scattering (INS) measurements on hydrides of magnesium and its compounds... 

Perhaps the most important structural determination since that of W(CO)3(PR3)2(H2) was the neutron study of mer-Fe(H2)H2(PEtPh2)3, which in combination with inelastic neutron scattering data and theoretical calculations revealed that i/2-H2 interacts with the hydride cis to it.21 The Fe-hydride distances... 

It is worth mentioning that, at least in the case of the [Co6(/inelastic neutron scattering spectra recoiled on [HCo -(CO)i5] salts with different counterions, or in various matrices, are not uniformly consistent and show the presence of both fiy and /le-H atoms. [331-333]... 

A host of special techniques are employed to study hydride systems (NMR, EPR/ESR, inelastic neutron scattering, etc.) and many have diverse applications and capabilities. Although it is almost impossible to catalog or even group techniques into specific disciplines, important data and interpretations of hydride behavior are found in several of these areas. A short review is included to present recent findings. Little, if any, Mossbauer work has been published since 1979, and that topic is not addressed. 

Fig. 30. Optical-phonon spectra from inelastic neutron scattering measurements on neptunium hydrides and deuterides. (a) Scattering law data for NpHj, 3 and NPD2.13. (b) Scattering lawdata for NpHj 55 at 90 K and room temperature. After Goldstone et al. (1989).

QUASI-ELASTIC AND INELASTIC NEUTRON SCATTERING STUDY OF CuTi AMORPHOUS HYDRIDES... 

The study of amorphous metal-hydrogen systems has started quite recently in contrast to the vast amount of work on the properties of crystalline metal-hydrogen systems that dates back over several decades and makes use of a great number of different techniques. The amorphous system a - Tij CuyHx has been studied by Inelastic Neutron Scattering (INS)" and Nuclear Magnetic Resonance (NMR) Very recently an extensive study of the structure of CuTi amorphous alloys and hydrides has been made by neutron diffraction and computer simulation (ref, 4 and references therein). 

---