Rutile

TiO2

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The commonest natural form of titanium dioxide (TiO2), rutile is an important ore of titanium that crystallizes in the tetragonal system. It appears in prismatic, acicular, or geniculated twinned crystals with an adamantine luster, a light-brown streak, good {110} cleavage, and colors from reddish-brown and red to black and golden. Its Mohs hardness is 6 to 6.5 and its specific gravity 4.18 to 4.25. Golden needle-like rutile crystals enclosed in quartz, known as rutilated quartz, are cut as gemstones, and fine rutile inclusions produce the silk that gives rise to star rubies and sapphires. A high specific gravity and adamantine luster distinguish rutile from the darker oxides it can resemble.

Rutile é a forma natural mais comum de dióxido de titânio e um minério importante de titânio. Seus cristais aciculares dourados inclusos em quartzo (quartzo rutilado) são apreciados como gemas. Também ocorre como inclusões de 'seda' em rubis e safiras estrelados.

Sistema Cristalino Tetragonal
Classe Mineral 04 Oxides and Hydroxides
Dureza Mohs 6.0-6.5
Gravidade Específica 4.18-4.25
Cor Reddish-brown, red, black, golden
Brilho Adamantine
Traço Light brown
Clivagem Good {110}
Fratura Conchoidal to uneven
Transparência Translucent
Hábito Cristalino Prismatic, acicular, twinned (geniculated)

Dureza Mohs

Mohs Hardness: 6,0 – 6,5
1 Soft10 Hard
Rutile has a Mohs hardness of 6–6.5 on the 1–10 mineral hardness scale.
Dureza Mohs Reference Mineral
1 Talc
2 Gypsum
3 Calcite
4 Fluorite
5 Apatite
6 Orthoclase
7 Quartz
8 Topaz
9 Corundum
10 Diamond

Sistema Cristalino

Tetragonal
Rutile crystallizes in the Tetragonal crystal system.
Propriedade Value
Sistema Cristalino Tetragonal
Axial Relationships a = b ≠ c, α = β = γ = 90°

Frequently Asked Questions

What is the hardness of Rutile?
Rutile has a Mohs hardness of 6.0-6.5.
What crystal system does Rutile belong to?
Rutile crystallizes in the Tetragonal crystal system.
What color is Rutile?
Rutile is typically Reddish-brown, red, black, golden.
What type of luster does Rutile have?
Rutile exhibits a Adamantine luster.
What is the chemical formula of Rutile?
The chemical formula of Rutile is TiO2.