Brookite
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Brookite is the orthorhombic variant of titanium dioxide, which occurs in four known natural polymorphic forms. The other three of these forms are akaogiite, anatase and rutile. Brookite is rare compa
Brookite from Balochistan
Brookite from Pakistan
Cherry-red Brookite from Kharan, Balochistan, Pakistan
Rutile
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Rutile is an oxide mineral composed of titanium dioxide, and is the most common natural form of TiO2. Rarer polymorphs of TiO2 are known, including anatase, akaogiite, and brookite.
Brookite
…forms (minerals with the same composition but different structure). The other three of these forms are akaogiite (monoclinic), anatase (tetragonal) and rutile (tetragonal). Brookite is rare compared to anatase and rutile and, like these forms, it exhibits photocatalytic activity. Brookite also has a larger…
Rutile ww 7a
Rutile in quartz
Milled rutile
Acicular crystals of rutile protruding from a quartz crystal