Brookite
Brookite is the orthorhombic variant of titanium dioxide, TiO2, which occurs in many natural polymorphic forms (minerals with the same composition but different structure). The International Mineralogical Association (IMA) recognizes four forms; the others 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 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.
AkaogiiteAnataseArmalcoliteArmand Lévy (mineralogist)Cleveland Ironstone FormationDispersion (optics)Gemstones of PakistanHenry James BrookeJames Holmes SturdivantList of eponyms (A–K)List of gemstones by speciesList of mineralsList of minerals named after peopleList of minerals recognized by the International Mineralogical Association (B)List of semiconductor materialsMagnet_Cove,_ArkansasOxide mineralPauling's rulesPseudobrookiteResearch in lithium-ion batteriesRutileStrukturbericht designationTitanium dioxideWhiteX-ray crystallographyXenotime
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Brookite
Brookite is the orthorhombic variant of titanium dioxide, TiO2, which occurs in many natural polymorphic forms (minerals with the same composition but different structure). The International Mineralogical Association (IMA) recognizes four forms; the others 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 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.
has abstract
A Brookita é um mineral consti ...... alogista inglês (1771 – 1857).
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Brookit (Lévy, 1825), chemický ...... ický krystalograf a mineralog.
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Brookit (brukit) – bardzo rzad ...... a i krystalografa (1771-1857).
@pl
Brookit är ett naturligt förek ...... r samt i sediment som mineral.
@sv
Brookita oxido motako minerala da.
@eu
Brookite is the orthorhombic v ...... evert to the rutile structure.
@en
Het mineraal brookiet is een titanium-oxide met de chemische formule TiO2.
@nl
La Brookite è un minerale formato da biossido di titanio.
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La brookita es un mineral con ...... lorado por los coleccionistas.
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La brookita és un mineral de l ...... valorat pels col·leccionistes.
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1,022,032,516
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2V
Calculated: 12° to 20°
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birefringence
δ = 0.117
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caption
Brookite from Balochistan
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category
class
Dipyramidal
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cleavage
Poor on {120}, in traces on {001}
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color
Deep red, reddish brown, yellowish brown, brown, or black
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dana
diaphaneity
Opaque to translucent
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dispersion
fluorescence
Non-fluorescent
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formula
TiO2
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fracture
Subconchoidal to irregular
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gravity
habit
Tabular and striated, pyramidal or pseudohexagonal
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imagesize
luster
Submetallic
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mohs
to 6
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molweight
name
Brookite
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opticalprop
Biaxial
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pleochroism
Very weak, yellowish, reddish, orange to brown
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refractive
nα = 2.583 nβ = 2.584 nγ = 2.700
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streak
White, greyish or yellowish
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strunz
(4/D.15-10 )
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symmetry
Pbca
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tenacity
Brittle
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twinning
On {120}, uncertain
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unit cell
a = 5.4558 Å,
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b = 9.1819 Å,
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c = 5.1429 Å; Z = 8
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wikiPageUsesTemplate
subject
hypernym
comment
A Brookita é um mineral consti ...... alogista inglês (1771 – 1857).
@pt
Brookit (Lévy, 1825), chemický ...... ický krystalograf a mineralog.
@cs
Brookit (brukit) – bardzo rzad ...... a i krystalografa (1771-1857).
@pl
Brookit är ett naturligt förek ...... r samt i sediment som mineral.
@sv
Brookita oxido motako minerala da.
@eu
Brookite is the orthorhombic v ...... bium Nb are common impurities.
@en
Het mineraal brookiet is een titanium-oxide met de chemische formule TiO2.
@nl
La Brookite è un minerale formato da biossido di titanio.
@it
La brookita es un mineral con ...... lorado por los coleccionistas.
@es
La brookita és un mineral de l ...... valorat pels col·leccionistes.
@ca
label
Brookiet
@nl
Brookit
@cs
Brookit
@de
Brookit
@pl
Brookit
@sv
Brookita
@ca
Brookita
@es
Brookita
@eu
Brookita
@pt
Brookite
@en
wasDerivedFrom
isPrimaryTopicOf
name
Brookite
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