Ardaite is a very rare sulfosalt mineral with chemical formula Pb₁₉Sb₁₃S₃₅Cl₇ in the monoclinic crystal system, named after the Arda river, which passes through the type locality. It was discovered in 1978 and approved by the International Mineralogical Association in 1980. It was the second well-defined natural chlorosulfosalt, after dadsonite.