Lutetium palladium oxide (LuPd2O4) has been prepared in a multianvil apparatus at 60 kbar pressure and 1000 degrees C. It crystallizes in the tetragonal LaPd2O4-type structure with space group I4(1)/a, a = 5.681(1) Angstrom, c = 9.881(2) Angstrom, and Z = 4. The structure of this compound, like that of NdCu2O4 and other members of this new class, is closely related to that of spinel except for the difference in oxygen arrangements, leading to a difference in coordination of the A, B, and O ions. It can be derived from spinel by oxygen displacements. A new version of Kugimiya and Steinfink's AB(2)O(4) correlation map in the region 0.04 < K-ab < 0.18 and 0.8 < r(a)/r(b) < 1.7, has been generated. It shows that the new AB(2)O(4) class lies in the area between the spinel- and CaFe2O4-type regions.
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