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The new equiatomic scandium transition metal aluminides Sc T Al for  T  = Cr, Ru, Ag, Re, Pt, and Au were obtained by arc-melting of the elements followed by subsequent annealing for crystal growth. The samples were studied by powder and single crystal X-ray diffraction. The structures of three compounds were refined from single crystal X-ray diffractometer data: ScCrAl, MgZn 2  type,  P 6 3 / mmc ,  a  = 525.77(3),  c  = 858.68(5) pm,  R  1  = 0.0188,  wR  2  = 0.0485, 204  F  2  values, 13 variables, ScPtAl, TiNiSi type,  Pnma ,  a  = 642.83(4),  b  = 428.96(2),  c  = 754.54(5) pm,  R  1  = 0.0326,  wR  2  = 0.0458, 448  F  2  values, 20 variables and ScAuAl, HfRhSn type,  P 6̅2 c ,  a  = 722.88(4),  c  = 724.15(4) pm,  R  1  = 0.0316,  wR  2  = 0.0653, 512  F  2  values, 18 variables. Phase pure samples of all compounds were furthermore investigated by magnetic susceptibility measurements, and Pauli-paramagnetism but no superconductivity was observed down to 2.1 K for all of them. The local structural features and disordering phenomena have been characterized by  27 Al and  45 Sc magic angle spinning (MAS) and static NMR spectroscopic investigations.

On new ternary equiatomic scandium transition metal aluminum compounds Sc T Al with T = Cr, Ru, Ag, Re, Pt, and Au