Crystal structure of CeRu0.88In2

Ternary intermetallic CeRu0.88In2 was synthesized by arc-melting from elemental Ce, Ru, and In under an argon atmosphere. The crystal structure of CeRu0.88In2 was determined from single-crystal X-ray diffraction data: a = 4.5449(11) Å, b = 10.014(2) Å and c = 7.6854(10) Å; space group Cmcm, Z = 4, MgCuAl2 type. The structure is formed of three-dimensional framework of [Ru0.88In2], in the infinite pentagonal channels of which Ce atoms are disposed. Similar to the other known ternary compounds of the Ce-Ru-In system, CeRu0.88In2 exhibits unusually short Ce-Ru contact equal to 2.530(4) Å, which in addition is the shortest one in the raw of LTIn2 compounds with MgCuAl2 structure type (L = La, Ce, Pr, Nd, Sm, Eu, Gd, Yb; T = Rh, Pd, Au).