Reference

The nature of hydrogen-induced amorphization of samarium-nickel (SmNi2) Laves compound

The nature of hydrogen-induced amorphization of samarium-nickel (SmNi2) Laves compound.Some chemicals with cas registry numbers like 1333-74-0 are also used. Chattopadyhay, K.; Aoki, K.; Masumoto, T. (Res. Inst. Iron, Steel Other Met., Tohoku Univ., Sendai 980, Japan). Scr. Metall., 21(3), 365-9 (English) 1987. CODEN: SCRMBU. ISSN: 0036-9748. DOCUMENT TYPE: Journal CA Section: 56 (Nonferrous Metals and Alloys) Cryst. SmNi2 [12201-95-5] powder, 100 mesh, was hydrogenated 24 h at 373 K. Structural changes were followed by x-ray diffraction, DSC, and TEM. The resulting amorphous powder formed SmH2 and M2 phase during crystn. at 669 K. The results are qual. rationalized by using or hypothetical free energy-compn. diagram. .

Proton nuclear magnetic resonance line narrowing and tetragonal lattice distortion in samarium hydride SmH2+x (0￡x￡0

Proton nuclear magnetic resonance line narrowing and tetragonal lattice distortion in samarium hydride SmH2+x (0￡x￡0.40). Zogal, O. J.; L'Heritier, P. (Inst. Low Temp. Struct. 139708-87-5 and 13598-32-8 are also occured in this study. Res., Pol. Acad. Sci., Wroclaw 50-950, Pol.). J. Alloys Compd., 177(1), 83-91 (English) 1991. CODEN: JALCEU. ISSN: 0925-8388. DOCUMENT TYPE: Journal CA Section: 77 (Magnetic Phenomena) Proton magnetic resonance expts. have been made on samarium hydride samples SmH2+x (O ￡ x ￡ 0.40) to search for proton self-diffusion and hydrogen ordering effects. Data are presented for the linewidths and some line shapes for temps. from about 78 K to 295 K. For all samples except SmH2.00, proton line narrowing was obsd. However, for x = 0.30 and x = 0.40 a system of two lines appeared below about 250 K. One of these lines is broad, and its second and fourth moments exhibit a weak temp. dependence. This indicates a possible hydrogen sublattice ordering below 250 K since this effect may hinder the proton diffusion and thus a broad resonance line results. The x-ray studies revealed a very small (c:a u 1.003) tetragonal deformation in SmH2.30 at low temps. The effect was much less distinct in SmH2.40 and not detected in SmH2.12. .