The normal halide of boron is boron trifluoride|. Boron forms many subhalides: several , including diboron tetrafluoride|; also BF. Aluminium forms a variety of subhalides. For gallium, adducts of  are known. Phosphorus subhalides include diphosphorus tetraiodide|, , and  (structurally related to ). For bismuth, the compound originally described as bismuth monochloride was later shown to consist of  clusters and chloride anions. There are many tellurium subhalides, including tritellurium dichloride|, ditellurium bromide| (X = Cl, Br, I), and two forms of TeI.