What is "xitieshanite"

n. (context mineralogy English) A conchoidal green or yellow mineral with the chemical formula Fe³⁺(SO₄)(OH)·7H₂O.

Xitieshanite is a hydrous iron sulfate– chloride mineral with chemical formula: Fe(SO)Cl·6(HO).

It was discovered in 1983 and named for the discovery location of Xitieshan lead/ zinc ore deposit in the Qinghai Province, China. The mineral has also been reported in 2005 from acid mine drainage from a coal mine in Green Valley, Vigo County, Indiana.