Lu37Ru16.4In4 – coloring and vacancy formation in a new structure type closely related to a 8 × 8 × 8 bcc superstructure

Abstract

Abstract The lutetium-rich intermetallic compound Lu37Ru16.4In4 was synthesized by induction melting of the elements in a sealed tantalum ampoule and subsequent annealing. The Lu37Ru16.4In4 structure was refined from single crystal X-ray diffractometer data: new type, I a 3 ‾ d $Ia\overline{3}d$ , a = 2756.21(11) pm, wR2 = 0.0579, 3056 F2 values and 92 variables. The superstructure formation of Lu37Ru16.4In4 is discussed on the basis of a group–subgroup scheme starting from the bcc structure as the aristotype.