Barium Phosphate [Ba3(PO4)2] is an alkaline earth phosphate and exhibits properties such as low dispersion, high refractive index, low melting and low glass transition temperature, high transparency to ultraviolet light, high thermal expansion coefficient. It is white in color. read more
Barium phosphate is a white solid. Whilst the answer given by Dr. Aziz is correct, its basis (that barium and phosphate are both colourless so therefore BaPO4H is colourless) is nonsense. Plenty of inorganic salts are a different colour to the individual components. read more
according to the solubility table, chlorines, bromides and iodides are soluble except for lead, mercury and silver. so adding chloride or iodide wont make a difference, but iodide is preferable because it forms a yellow precipitate instead of the normal white precipitate and thus would be easily distinguished from other cations. read more