Bursaite is a sulfosalt of the lillianite family. It has the formula Pb5Bi4S11 and orthorhombic structure. Bursaite is named after Bursa Province, Turkey, where it was discovered. It is generally located in regions rich in sulfur and commonly occurs alongside other sulfosalts. Its areas of formation are usually those that were once volcanogenic because it is generally aggregated with other minerals under intense heating. It was officially delisted as a mineral in 2006, being cited as an intergrowth of two other sulfosalts.