Journal ArticleDOI
The crystal structure of rare-earth nickel compounds of the type R2Ni7
K.H.J. Buschow,A.S. Van Der Goot +1 more
TLDR
In this paper, the lattice parameters of rare-earth nickel alloys have been determined for R = La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er and Y.Abstract:
Various rare-earth nickel alloys with 70–80 at.% Ni have been studied by X-ray diffraction and metallography. The lattice parameters of compounds of the type RNi3 and R2Ni7 have been determined for R = La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er and Y. A structure determination is given for La2Ni7 and Sm2Ni7. Some of the compounds R2Ni7 have been observed to have two modifications. Indications have been obtained that the transformation between these two modifications is of the martensitic type. It is shown that the crystal structure of the R2Ni7 compounds is size-dependent.read more
Citations
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Journal ArticleDOI
Intermetallic compounds of rare-earth and 3d transition metals
TL;DR: A survey of the physical properties, composition and crystal structure of intermetallic compounds formed between rare-earth elements and 3D transition elements is given in this article.Apart from binary compounds, the results of pseudobinary series are also considered.
Journal ArticleDOI
Synthesis and structure determination of a new series of hydrogen storage alloys; RMg2Ni9 (R=La, Ce, Pr, Nd, Sm and Gd) built from MgNi2 Laves-type layers alternating with AB5 layers
K. Kadir,Tetsuo Sakai,I. Uehara +2 more
TL;DR: A number of new ternary magnesium based alloys, RMg2Ni9 (where R=La, Ce, Pr, Nd, Sm and Gd), have been synthesized by reacting a mixture of MgNi2 with RNi5 intermetallic compounds or by direct combination of the elements in the atomic ratio R:Mg:Ni=1:2:9.
Journal ArticleDOI
Hydrides of LaNi compounds
TL;DR: In this paper, X-ray diffraction verified that LaNiH3.6 and LaNi5H6.5 are ternary compounds, while LaNi2H4.5, LaNi3H5 and La2Ni7H10 form in an amorphous state.
Journal ArticleDOI
Mg substitution effect on the hydrogenation behaviour, thermodynamic and structural properties of the La2Ni7-H(D)2 system
TL;DR: In this article, the influence of magnesium on the hydrogenation behavior of the (La,Mg) 2 Ni 7 alloys was studied using in situ synchrotron X-ray and neutron powder diffraction in H 2 /D 2 gas and pressure composition-temperature measurements.
Journal ArticleDOI
Microstructures and hydrogen absorption/desorption properties of LaNi alloys in the composition range of La77.8 ∼ 83.2 at.%Ni
Takashi Yamamoto,Haruyuki Inui,Makoto Yamaguchi,Sato Koichi,Shin Fujitani,I. Yonezu,Koji Nishio +6 more
TL;DR: In this paper, the intermetallic phase, La5Ni19 of the Ce5Co19-type, was found as an equilibrium phase at a composition between La2Ni7 and LaNi5.
References
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Journal ArticleDOI
Crystal structures of AB3 and A2B7 rare earth-nickel phases
A.V. Virkar,A. Raman +1 more
TL;DR: The structural data of several nickel-rich rare earth-nickel phases are reported in this article, where three modifications are encountered for Nd2Ni7 and three modifications were encountered for the high-temperature forms.
Journal ArticleDOI
The crystal structure of PuNi3 and CeNi3
D. T. Cromer,C. E. Olsen +1 more
TL;DR: The structure of PuNi/sub 3/ and the structure and composition of CeNi/ sub 3/ were determined by single crystal x-ray methods as discussed by the authors, which were both derived from siacking single layers of ihe MNi/sub 5/ structure (CaCu/sub 4/type) and double layers of the MNi-sub 2/Mg type.
Journal ArticleDOI
The crystal structure of Ce2Ni7
D. T. Cromer,A. C. Larson +1 more
TL;DR: In this article, the structure determination of the CeNi/sub 2/Ni/syb 7/ is described, and the unit cell is hexagonal, probable space group P6/sub 3/mmc, with a = 4.98 plus or minus 0.02, c = 24.52 plus or plus 0.08 A, and contains four formula units.
Journal ArticleDOI
Crystal structures, magnetic properties and phase relations of erbium-nickel intermetallic compounds
TL;DR: In this paper, the binary system erbium-nickel has been investigated by X-ray diffraction, thermoanalysis and metallography and a constitutional diagram has been constructed.
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Synthesis and structure determination of a new series of hydrogen storage alloys; RMg2Ni9 (R=La, Ce, Pr, Nd, Sm and Gd) built from MgNi2 Laves-type layers alternating with AB5 layers
K. Kadir,Tetsuo Sakai,I. Uehara +2 more