Zr7Sb4 has been Prepared by arc-melting of the elemental components and annealing at 1000-1150 degreesC. Its crystal structure was determined by X-ray diffraction (Pearson symbol mP44, monoclinic, space group P2(1)/c, Z = 4, a = 8.4905(6) Angstrom, b = 11.1557(8) Angstrom, c = 11. 1217(8) Angstrom, beta = 111.443(2)degrees at 295 K). Zr7Sb4 is isotypic to Hf6TiSb4, a compound stabilized by differential fractional site occupancy. It is the first binary group-4 antimonide with this metal-to-antimony ratio, but it differs from the corresponding phosphicles and arsenides M(7)Pn(4) (M = Ti, Zr, Hf; Pn = P, As), which adopt the Nb7P4-tYpe structure. Zr7Sb4 is built up from layers excised from the tetragonal W(5)Si(3)type structure; these layers are displaced relative to each other to maximize interlayer Zr-Zr and Zr-Sb bonding, as confirmed by band structure calculations.