Oxides, neutron diffraction studies

Direct Synthesis reaction of, 6 395 fluoride, 21 235, 237, 239, 249 homopolyatomic cations, 17 82 ion, stereochemistry, 2 40-41, 44-45 isocyanates, preparation, 9 158 properties, 9 157 isothiocyanates, properties, 9 177 mixed valence compounds of, 10 375-381 crystal structure of, 10 376 diffuse reflectance spectrum of, 10 380 structure of Pb," ion, 10 381 nuclear magnetic shielding, 22 224 organometallic compounds, 2 82, 88, 89 oxide, neutron diffraction studies on, 8 231-233... 

Charlet, L. Manceau, A.A. (1992a) X-ray absorption spectioscopic study of the sorption of Cr(III) at the oxide/water interface. II. Adsorption, coprecpitation, and surface precipitation on hydrous ferric oxide. J. Colloid Interface Sd. 148 443-458 Charlet, L. Manceau, A.A. (1992) X-ray absorption spectroscopic study of the sorption of Cr(III) at the oxide-water interface. J. Colloid Interface Sd. 148 425-442 Chatellier, X. Fortin, D. West, M.M. Leppard, G.G. Ferris, F.G. (2001) Effect of the presence of bacterial surfaces during the synthesis of Fe oxides by oxidation of ferrous ions. Fur. J. Mineral. 13 705-714 Cheetham, A.K. Fender, B.E.F. Taylor, R.I. (1971) High temperature neutron diffraction study of Fei. O. J. Phys. C4 2160-2165 Chemical Week (1988) Glidderfs anti rust secret is out." 15 10... 

Specific examples in which results from ALCHEMI are compared with X-ray or neutron diffraction studies on the same sample have been presented for olivine [51], clinopyroxene [57] and feldspar [54] To date, all published planar ALCHEMI studies on mineral samples other than oxides containing high-Z elements (e.g. ceramic nuclear wasteforms, [58]) have been internally consistent and tractable. For example, a combined X-ray diffraction and ALCHEMI study on a complex, nonstoichiometric clinopyroxene [52] has been used to determine the location of vacancies in the structure. In... 

In a neutron diffraction study of the ethylene oxide clathrate deuterohy-drate 6(CH2)20-46D20, the hydrogen-bonded host framework is defined by three independent deuterated water oxygen atoms occupying special positions, as shown in the table below. The deuterium atoms are located precisely as... 

Hollander F, Jeffrey GA (1977) Neutron diffraction study of the crystal structure of ethylene oxide deuterohydrate at 80 K. J Chem Phys 66 4699 - 4705... 

Boyapati, S., Wachsman, E.D., and Chakoumakos, B.C., Neutron diffraction study of occupancy and positional order of oxygen ions in phase stabilized cubic bismuth oxides. Solid State Ionics, 2001, 138, 293-304. 

The structure of the internal acid site in ZSM-5 can be inferred from the similarity of infrared and NMR data to those of the acidic protons in zeolite HY, where neutron diffraction studies (ref. 21) have shown that the proton is located on an oxide ion bridging between silicon and aluminium ... 

The bulk structures of most minerals important to soil chemists are well known from x-ray and neutron diffraction studies. Exceptions to this generality would be the various amorphous oxides and mixed oxide precipitates. Methods pioneered by Catlow s group should find increasing applicability to the structural study of these amorphous soil minerals and mixed phases. Their approach has been to develop ionic-type force fields for performing static energy minimizations of general oxide and halide minerals. Since ionic force fields rei uire far fewer parameters than va-... 

It is reported [6] that active sites over oxides or mixed oxides for the dehydrogenation and hydrogenation reactions are generated, by co-ordination vacancies. In the case of spinel oxides, 110 and 111 planes are found to be exposed to the outer surface by differential neutron diffraction studies [7]. The active sites over these planes are formed by anionic vacancies due to the removal of oxygen atoms. These sites are shared between cuprous ions and another octahedral cation located in the plane or in the sublayer. These anionic vacancies are denoted as bimetallic vacancies (BMV). 

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