Abstract

The crystal structures of new ternary compounds Y 8Ag 19.4Al 46.6 (space group I4/ mmm, Yb 8Cu 17Al 49-type structure, a=0.88277(3), c=1.66994(8) nm, R I=0.072) and Y 3Ag 1.5Al 9.5 (space group Immm, La 3Al 11-type structure, a=0.42827(1), b=1.26026(3), c=1.00312(3) nm, R I=0.081) have been determined for the first time. The atomic coordinates and the Ag and Al atom distributions in YAg 5.2Al 6.8 (ThMn 12-type structure), Y 1.8Ag 8.3Al 8.7 (Th 2Ni 17-type structure) and YAg 2.5Al 2.7 (DyAg 2.4Al 2.6-type structure) have been refined.

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