... potassium, sodium, calcium, magnesium, phosphorus, iron and zinc elements and so on Maifanite is a natural drug ore. ... copper, strontium, iodine, fluorine, silicic acid and other eighteen kinds of trace elements , which are necessary for the ... can be used for water purification, sewage treatment, and the bacteria with strong adsorption.chemical properties: ProjectsDataProjectsDataProjectsDataDensity2 ...