Anatase is a mineral form of titanium dioxide. It is a comparatively uncommon, still a very aesthetic form. It forms unique and distinct crystals, which are usually very small. However, the large naturally occurring crystalline Anatase can be located in a few localities in Europe, and they display a Tetragonal system and Adamantine Metallic luster.
Derivation Of Name
The mineral Anatase was named in 1801 by a French mineralogist René Just Haüy. The name has been derived from the Greek word “Anatasis," meaning extension. The vertical axis of its crystals are longer than in Rutile (a major titanium metal used in high- tech alloys).
It occurs in Gneisses, schists, and other metamorphic rocks. It is also found in Detrital grains (sand-sized minerals like feldspar and quartz) as an complimentary mineral in granites and in other various igneous rocks.
Anatase usually occurs as very minute crystals. They are mostly transparent and very dark in color. Gems of this mineral are very beautiful and cut as curiosities. But, because of their scarcity, they are never seen for sale.
Europe contains some of the top places for Anatase such as Norway, France, and Switzerland. If you want to have dark and large crystals of this mineral, then you can get it in Matskorhae, Hardangervidda and Dyrfonni. Anatase also come from some localities of the US, Kharan, Pakistan, Brazil, California and Balochistan.
The minerals Anatase, Brookite and Rutile, all show the same chemistry TiO2, but they have diverse structures. Anatase is basically a polymorph with these two minerals. It has been seen that at high temperatures, Anatase shows Rutile’s structure. Anatase is the rarest mineral among the three.
Color: Dark blue, reddish- brown, navy blue, black, red, brown, green, gray, honey yellow or orange.
3.79 - 3.97 g/cm3.
Anatase has a wide range of applications in jewelry, paper, cosmetics, welding rods to food coloring. It is also used in making rubber products and non decorative paints.