Image: Wikimedia Commons

brookite

Titanium dioxide mineral

Instance of: mineral species
1
Sources
1.Stated in The IMA List of Minerals (November 2021)
View statement on Wikidata ↗
Subclass of: oxide class of minerals

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

Brookite is the orthorhombic variant of titanium dioxide (TiO2), which occurs in four known natural polymorphic 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 cell volume than either anatase or rutile, with 8 TiO2 groups per unit cell, compared with 4 for anatase and 2 for rutile. Iron (Fe), tantalum (Ta) and niobium (Nb) are common impurities in brookite.

Overview

All data

29 statements · 34% with external sources · numbers in brackets are citations

Nickel-Strunz '10th ed', review of (9th ed/ 2009 update): 4.DD.10
IMA status and/or rank: grandfathered mineral (G)
1
Sources
1.Stated in IMA/CNMNC List of Mineral Names (March 2007)
View statement on Wikidata ↗
Named after: Henry-James Brooke
1
Sources
1.Stated in A Dictionary of the Names of Minerals
View statement on Wikidata ↗
Formula: TiO₂
Nickel-Strunz 9th edition (updated 2009): 4.DD.10
1
Sources
1.Stated in mineralienatlas.de
View statement on Wikidata ↗
Crystal system: orthorhombic crystal system
Members / parts: titanium dioxide
IMA Mineral Symbol: Brk
1
Sources
1.Stated in IMA–CNMNC approved mineral symbols
View statement on Wikidata ↗
Strunz 8th edition (series ID, updated): IV/D.07
1
Sources
1.Stated in Mineralogische Tabellen : Eine Klassifizierung der Mineralien auf kristallchemischer Grundlage, mit einer Einfuhrung in die Kristallchemie (1982)
View statement on Wikidata ↗
Density: 3,856.14 kg/m³ temperature: 0 K · state of matter: solid
Bulk modulus: 184B Pa
Shear modulus: 47.4B Pa
Poisson's ratio: 0.382

On other databases

13 identifiers linking brookite across the web's reference databases

Data quality

statements

34%

externally sourced

Source last edited August 18, 2026. AIDB refreshes this page daily.

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AIDB. (2026). brookite (Q410609). Retrieved from https://aidb.si/e/brookite-Q410609