Terbium(III) chloride (TbCl3) is a chemical compound. In the solid state TbCl3 has the YCl3 layer structure. Terbium(III) chloride frequently forms a hexahydrate. Hazards Terbium(III) chloride causes hyperemia of the iris. Conditions/substances to avoid are: heat, acids and acid fumes. References Chlorides Lanthanide halides Terbium compounds