These solutions contained a range of concentrations of sodium, chloride, potassium, carbonate, phosphate, and hydroxide. Calcium phosphate salts assist in stiffening bones. The primary mineral is hydroxyapatite, which is a crystalline calcium phosphate. Enamel's primary mineral is hydroxyapatite, which is a crystalline calcium phosphate. Common sources are sulfate of potash, potassium bicarbonate, monoammonium phosphate, etc. Vitamin D is involved in calcium and phosphate regulation. The teeth consist of easily fossilized calcium phosphate, an apatite. The most prevalent compounds of phosphorus are derivatives of phosphate (PO), a tetrahedral anion. They are a rich source of calcium phosphate. Dicalcium phosphate is the calcium phosphate with the formula CaHPO and its dihydrate. Some glycosyltransferases catalyse transfer to inorganic phosphate or water. Exports include fish, chemicals, cotton, fabrics, groundnuts, and calcium phosphate. Many phosphate salts are derived from hydrogen phosphate (HPO). Nucleotides are molecules consisting of a nucleoside and a phosphate group. Significant deposits of clay, limestone, marble, silica, and phosphate exist.