Large hydrogen capacity in hydrides R2Ni2In–H (R=La, Ce, Pr, Nd) with new structure type

Influence of hydrogen absorption on structural and magnetic properties of Ce2Ni2In

“…The intermetallic compound Ce 2 Ni 2 In easily absorbs hydrogen up to the composition Ce 2 Ni 2 InH 4.98 , in good agreement with the previous report [10]. The tetragonal structure of the Mo 2 FeB 2 -type accommodates the hydrogen atoms up to x ≈ 2 with insignificant expansion of the lattice.…”

“…The aim of the present work was to attempt affecting the electronic ground state in Ce 2 Ni 2 In by hydrogen atoms insertion. Recently, the results of a similar independent study were reported for the series R 2 Ni 2 InH x (R = La, Ce, Pr, Nd) where the hydrogen content was fixed to x = 4.5-5 [10]. It was found that upon hydrogen absorption the crystal structure changes into an orthorhombic one (space group Pbam), and this transition is accompanied with the unit cell volume increase by 10-20%.…”

“…For larger x one observes on the diffraction patterns the appearance of several other peaks besides those corresponding to the Mo 2 FeB 2 -type unit cell, which can be indexed assuming the orthorhombic symmetry Pbam (subsequently called ␤-phase), reported in Ref. [10] for Ce 2 Ni 2 InH 5 . The relative intensities of the Bragg peaks due to the ␣-and ␤-phases gradually change with increasing the hydrogen content, and for x = 4.98 a nearly single ␤-phase pattern is observed, as demonstrated in Fig.…”

Structural Chemistry and Magnetic Properties of R2Ni2-xIn (R=Gd-Er, x=0.22 or 0.3) Compounds

“…Till now magnetic properties were determined only for some tetragonal R 2 Ni 2 In and R 2 Ni 2−x In compounds. Magnetic and specic heat measurements carried out for Nd 2 Ni 2 In indicate antiferromagnetic order with the rst-order magnetic phase transition at T N = 8 K [18].…”

Effect of hydrogenation on the crystal structure of La2Pd2In

“…It has been shown that the "2:2:1" compounds on the basis of U or rare earths exhibit a significant tunability by the H absorption [2][3][4][5][6][7][8]. The uranium intermetallics absorb up to 2 H atoms/f.u.…”