What is TiO2 anatase?
Anatase is a metastable mineral form of titanium dioxide (TiO2) with a tetragonal crystal structure. Although colorless or white when pure, anatase in nature is usually a black solid due to impurities.
What is the difference between anatase rutile and brookite?
The key difference between anatase rutile and brookite is that anatase has a tetragonal unit cell with four TiO2 units and rutile has a tetragonal unit cell with two TiO2 units, whereas brookite has an orthorhombic unit cell with eight TiO2 units. Titanium dioxide or TiO2 is an important mineral that naturally occurs.
What is the percentage of titanium in rutile?
The predominate minerals are rutile, which is about 95 percent titanium dioxide (TiO2), and ilmenite (FeTiO3), which contains 50 to 65 percent TiO2.
What is rutile phase of TiO2?
Thermodynamically, rutile is the most stable polymorph of TiO2 at all temperatures, exhibiting lower total free energy than metastable phases of anatase or brookite. Consequently, the transformation of the metastable TiO2 polymorphs to rutile is irreversible.
What is the difference between anatase titanium dioxide and rutile titanium dioxide?
Rutile titanium dioxide is a component that contains mainly TiO2 with a dark red appearance, whereas Anatase titanium dioxide has colorless to blue appearance.
What is the difference between rutile and anatase?
The hardness of rutile is high. Anatase is less hard. The specific gravity of rutile is high. The specific gravity of anatase is low. Rutile and anatase are two mineralogical terms that give the two major forms of naturally occurring titanium dioxide.
What is the nature of rutile titanium dioxide?
Rutile titanium dioxide or commonly rutile is a mineral that primarily has TiO 2 with a deep red appearance. It is the most abundant naturally occurring form of titanium dioxide due to its high stability. Rutile has polymorphs such as anatase, brookite, etc. Rutile mainly occurs in igneous rocks…
What is the color of anatase?
Its color is brown to black or yellow to blue. Anatase is the rarest form of titanium dioxide, but it has almost the same properties as rutile with regards to its hardness, density, and luster. However, you can distinguish the two minerals apart by their cleavage and crystal habit.