Non-collinear magnetic ordering in U2Rh3Si5

Neutron powder diffraction reveals a non-collinear antiferromagnetic arrangement of the eight uranium magnetic moments within the unit cell of U2Rh3Si5 below TN = 26 K. The μx component of the moments orders in ferromagnetic wavy sheets stacked antiferromagnetically along x, while μy exhibits a two-up, two-down configuration along y, else being stacked like μx. The magnetic structure is associated with the ordered moment μ = 1.81(5)μB at T = 8.5 K.