Cluster Self-Organization of Intermetallic Systems: New Four-Layer Cluster Precursor K244=0@12@20@80@132 and New Three-Layer Cluster Precursor K245=1@14@48@206 in the Rh140Al403-cP549 and Mn18Pd138Al387-cP549 Crystal Structures

The geometric and topological analysis of the crystal structure of (i) the Rh140Al403-cP549 intermetallide with cubic cell parameters a = 19.9350 angstrom, V = 7922.25 angstrom(3), and the Pm-3 space group and (ii) the Mn18Pd138Al387-cP549 intermetallide with cubic cell parameters a = 20.211 angstrom and Pm-3 space group is conducted by the ToposPro program package. Two new cluster precursors with the symmetry -43m is established: the K244 = 0@12@20@80@132 four-layer cluster with an inner icosahedron Pd-12 or Rh-12 and the three-layer cluster K245 = 1@14@48@206 with an inner 15-atom polyhedron Al@Pd8Al6 or Al@Rh8Al6. The symmetric and topological code of self-assembly processes of 3D structures from K244 and K245 nanocluster precursors is reconstructed in the following form: primary chain -> microlayer -> microframework. MAl3 and M2Al2 (M = Rh or Pd) clusters bound by Al atoms were adjusted as spacers occupying voids in the 3D framework of the K242 and K245 nanoclusters.