The mineral is named after William Withering, who in 1784 recognized it to be chemically distinct from barytes. It occurs in veins of lead ore at Hexham in Northumberland, Alston in Cumbria, Anglezarke, near Chorley in Lancashire and a few other localities. Witherite is readily altered to barium sulfate by the action of water containing calcium sulfate in solution and crystals are therefore frequently encrusted with barytes. It is the chief source of barium salts and is mined in considerable amounts in Northumberland. It is used for the preparation of rat poison, in the manufacture of glass and porcelain, and formerly for refining sugar.It is also used for controlling the chromate to sulfate ratio in chromium electroplating baths.
|Total sulphur (On SO4 basis)||0.3%max|
|HCL insoluble matter||0.25%max|
|Iron as Fe2O3||0.004%max|
|Average Particle Size （D50）||1-5um|
It's widely used in the production of electronics, ceramics, enamel, floor tiles, building materials, purified water, rubber, paint, magnetic materials, steel carburizing, pigment, paint or other barium salt, pharmaceutical glass and other industries.
25KG/bag, 1000KG/bag, according to customers’ requirement