Y3Ru2-x-A Representative of a Composite Modulated Family of Intermetallics

The compound Y3Ru2-x was synthesized from the elements and the structure was solved from single crystal synchrotron data. The high quality of the data allowed the determination of the incommensurate ordering of the compound, previously reported as disordered, with respect to the second subsystem. The compound crystallizes in the super space group X-3(00)0 with the q-vector axial along c*, q = 00, = 0.4276(7) and the centering vectors (1/3 2/3 0 1/3), (2/3 1/3 0 2/3).