Suitable reactions in sealed Nb tubing at 850-950 degrees C gave good yields of a family of oligomeric cluster phases that were characterized by single-crystal X-ray diffraction means. The basic Y(16)Z(4) units (similar to (4) over bar symmetry) can be derived from 2+2 condensation of centered Y(6)Br(12)Z-type clusters or as tetracapped truncated tetrahedra Y-16 that are centered by a large tetrahedral Z(4). These are surrounded by 36 bromine atoms which bridge edges or cap faces of the Y(16)Z(4) nuclei and, in part, bridge to metal atoms in other clusters. The principal bonding appears to be Y-Z and Y-Br, with weaker Y-Y (d similar to 3.70 Angstrom) and negligible Z-Z interactions. The phase Y16Br20Ru4 (P4(2)/nnm, Z = 2; a = 11.662(1) Angstrom, c = 16.992 (2) Angstrom) is isostructural with Y16I20Ru4 and with the new Sc(16)Br(20)Z(4) (Z = Fe, Os). Syntheses only in the presence of Ir and ABr-YBr3 fluxes (A = K-Cs) produce Y16Br24Ir4 (Fddd, Z = 8; a = 11.718(3) Angstrom, b = 22.361(7) Angstrom, c = 44.702(2) Angstrom), in which the electron-richer Ir interstitials are compensated by four additional bromine atoms and altered bridging between macroclusters. Larger amounts of YBr3 yield a third example, Y30Br36-Ir-4(Y(16)Br(24)Tr(4) . 4YBr(3), I4(1)a, Z = 4; a = 12.699(1) Angstrom, c = 45.11--(I) (1) Angstrom). Here infinite zigzag chains of YBr6/2 octahedra that share cis edges lie between and bridge to the Y16Ir4 clusters. All of these phases contain 60-electron, closed-shell macroclusters. Y16Br20Ru4 and Y20Br36Ir4 were found to exhibit temperature-independent (Van Vleck) paramagnetism with values typical of those found for other rare-earth-metal, zirconium, niobium, and tantalum cluster halides.