[en] Crystals of Te₃Cl₂, within the isotypic series Te₂X (X=Cl, Br, I) of Te₂Br and Te₂I, as well as of β-TeI and α-TeI have been prepared and were used for structure determination with single crystal methods. Te₃Cl₂ is monoclinic, space group P2₁/n, z=4, with a=10.136(15), b=8.635(3), c=7.039(8) A and β=100.74(6)⁰. The structure consists of macromolecular units of tellurium atoms, which relation to the structure of elemental tellurium is discussed. Te₂X is orthorhombic with space group Pnam, z=8. Lattice parameters for the bromide [iodide] are:a=14.921(12) [15.295(3)], b=12.843(6) [13.694(4)], c=4.005(3) [4.123(2)] A. The structure consists of infinite double chains condensed to ribbons of Te₆ rings with boat conformation and bridging halogen atoms at the edges. β-TeI is monoclinic, space group C2/m, z=8, with cell constants a=15.383(2), b=4.182(2), c=11.999(2) A and β=128.09(1)⁰. The structure consists of endless chains of tellurium atoms along which the iodine atoms occupy alternating bridging and terminal positions. α-TeI is triclinic, space group P1, z=8, with lattice parameters a=9.958(3), b=7.992(2), c=8.212(4) A, α=104.37(11), β=90.13(4) and γ=102.89(7)⁰. The macromolecular building principle of the subhalides of tellurium is degenerated in α-TeI to a Te₄-ring (the Te₄I₄ molecule). The structures studied are compared to each other and discussed in connection with structures of other tellurium compounds. (author)