31. It was the world's second largest producer of rutile , used for paint pigments. 32. In nature, this compound is found in the minerals anatase, brookite, and rutile . 33. Natural rutile may contain up to 10 % iron and significant amounts of niobium and tantalum. 34. This product is called synthetic rutile . 35. This is further processed in a similar way to rutile to give the titanium dioxide product. 36. The titanium minerals are mostly anatase and rutile , and zirconium occurs in the mineral zircon. 37. Titanium ( ilmenite ) extraction was significant, as well as that of zircon and rutile . 38. Thereafter, rutile , leucoxene and then ilmenite in terms of value given to the ore. 39. Rutile has a higher refractive index and specific gravity, which affects transparency and particle size.40. Calculations give ??gr C " 7?for Rutile , and ??gr C " 20?for Calomel.
