Crystal structure of Na2Mg2NiH6 revisited.

The crystal structure of Na(2)Mg(2)NiH(6) as published by Kadir and Noreus (Inorg. Chem. 2007, 46, 2220-2223) is revised.

Hydrogen absorption in transition metal silicides: La3Pd5Si-hydrogen system.

Pressure-composition isotherm measurements show that the ternary lanthanum palladium silicide phase La3Pd5Si absorbs reversibly up to 5 hydrogen atoms per formula unit at 550 K and 14 bar hydrogen pressure. In-situ synchrotron and neutron powder diffraction reveals three phases, an alpha-phase having the limiting composition La3Pd5SiD approximately 1.6 at low deuterium pressure (at up to 9.

Tetrahedral D atom coordination of nickel and evidence for anti-isostructural phase transition in orthorhombic Ce2Ni7D approximately 4.

Hydrogenation of hexagonal Ce2Ni7 was investigated by synchrotron X-ray and neutron powder diffraction. In contrast to the recently investigated lanthanum analogue, which remains hexagonal (La2Ni7D6.5: space group P63/mmc), the cerium compound becomes orthorhombic (Ce2Ni7D approximately 4: space group Pmcn).

Neutron powder diffraction with (nat)Sm: crystal structures and magnetism of a binary samarium deuteride and a ternary samarium magnesium deuteride.

Binary SmH(3) (trigonal, a=656.7(3), c=680.1(3) pm, P$\bar 3$c1, Z=6), ternary SmMg2H7 (tetragonal, a=626.