Editing Titanium (section)

===Pigments, additives, and coatings===
[[File:Titanium(IV) oxide.jpg|thumb|alt=Watch glass on a black surface with a small portion of white powder|[[Titanium dioxide]] is the most commonly used compound of titanium.]]
About 95% of all titanium ore is destined for refinement into [[titanium dioxide]] ({{chem|TiO|2}}), an intensely white permanent [[pigment]] used in paints, paper, toothpaste, and plastics.<ref name="USGS">{{cite web |title=Titanium |publisher=[[United States Geological Survey]] (USGS) |website=USGS Minerals Information |url=http://minerals.usgs.gov/minerals/pubs/commodity/titanium/}}</ref> It is also used in cement, in gemstones, and as an optical opacifier in paper.<ref>{{cite book |last=Smook |first=Gary A. |year=2002 |title=Handbook for Pulp & Paper Technologists |edition=3rd |publisher=Angus Wilde Publications |isbn=978-0-9694628-5-9 |page=223 |url=https://books.google.com/books?id=TgtFPgAACAAJ}}</ref> 

{{chem|TiO|2}} pigment is chemically inert, resists fading in sunlight, and is very opaque: it imparts a pure and brilliant white color to the brown or grey chemicals that form the majority of household plastics.<ref name=HistoryAndUse/> In nature, this compound is found in the minerals anatase, brookite, and rutile.<ref name=EBC/> Paint made with titanium dioxide does well in severe temperatures and marine environments.<ref name=HistoryAndUse/> Pure titanium dioxide has a very high [[refractive index|index of refraction]] and an [[optical dispersion]] higher than [[diamond]].<ref name=LANL/> Titanium dioxide is used in [[sunscreen]]s because it reflects and absorbs [[UV light]].<ref name=Stwertka1998/>