Titanium Dioxide Anatase type
TiO2 (Anatase)
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Chemical name
Titanium Dioxide Anatase type |
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Mineral name
Anatase |
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Chemical formula
TiO2 (Anatase) |
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Melting point [°C]
1843 |
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Crystal system
tetragonal |
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Crystal Class
ditetragonal-dipyramidal (4/m 2/m 2/m) |
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Space Group
I4_1/amd |
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Unit cell
a [Å]:3.74 b [Å]:3.74 c [Å]:9.39 |
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Molecular weight [g/mol]
79,86 |
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Formula units
Z=4 |
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Frequent crystal surfaces
often prismatic with {110} and {010} |
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Twinning
rare on {112} |
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Mohs hardness
5.5 - 6 |
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Density [g/cm3]
3.9 |
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Cleavage
perfect on {001} and {011} |
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Fracture / Tenacity
brittle to weakly conchoidal |
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Color
black, reddish to yellowish brown, dark blue, gray |
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Streak
pale yellowish to white |
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Transparency
transparent to opaque |
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Luster
metallic to adamantine |
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Optical character
uniaxial (-) |
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Refractive Index
nω=2.561; nε=2.488 |
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Birefringence δ
0.073 |
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Pleochroism δ
weak |
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Orientation
(010), (100), (001), (110), (111), all others on request |
