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sphene
[ sfeen ]
noun
- a mineral, calcium titanium silicate, CaTiSiO 5 , occurring as an accessory mineral in a variety of crystalline rocks, usually in small wedge-shaped crystals.
sphene
/ sfiːn /
noun
- a brown, yellow, green, or grey lustrous mineral consisting of calcium titanium silicate in monoclinic crystalline form. It occurs in metamorphic and acid igneous rocks and is used as a gemstone. Formula: CaTiSiO 5 Also calledtitanite
sphene
/ sfēn /
- A brown or yellow monoclinic mineral occurring as an accessory mineral in igneous and metamorphic rocks. It usually occurs as wedge or lozenge-shaped crystals. Chemical formula: CaTiSiO 5 .
Word History and Origins
Origin of sphene1
Word History and Origins
Origin of sphene1
Example Sentences
The purer beds recrystallize as marbles, but where there has been originally an admixture of sand or clay lime-bearing silicates are formed, such as diopside, epidote, garnet, sphene, vesuvianite, scapolite; with these phlogopite, various felspars, pyrites, quartz and actinolite often occur.
Sphene, biotite and iron oxides are the other common constituents, but these rocks show much variety of composition and structure.
Tī′tanite, or Sphene, a soft greenish mineral often present in syenite.
Lig′urite, a variety of sphene or titanite.
Among other minerals found in them are biotite and chlorite, tourmaline, epidote, apatite, garnet, hornblende and augite, sphene, pyrites.
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