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Titanite

MNHN N°206.43

visu_519 infos

FROM : Northwest of Jugnot, Tangir valley, Pakistan
SIZE : 2.3 x 1.3 x 1.5 cm

general description

This sample is an isolated crystal of titanite. Some of its faces are striated. The titanite is brown-red and transparent and shows that it has developed in a pegmatite (titanites developed in alpine fissures are green).

This sample comes from Northwest of Jugnot in Pakistan. It integrated the collections of the Muséum national d’Histoire naturelle thanks to the of a private Italian collector. It is kept in the storage rooms of the Muséum (i.e., not yet displayed to the public).

Photography: A. Dahmane / Photo Saint-Hilaire, © MNHN.

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The Species page

Identity card

SPECIE : Titanite

HISTORY : Name given because of its composition, bearing titanium

Species first described in 1795 by Martin Heinrich Klaproth (1743-1817), German professor of chemistry, University of Berlin

Type-locality: Passau, Bavaria, Germany
ANCIENT NAME : Sphène

CHEMICAL FORMULA : Ca Ti SiO5
CRYSTAL SYSTEM : Monoclinic
COLOR : Colourless, yellow, green, gray, black
DIAPHANIETY : Transparent to opaque
LUSTER : Adamantine to vitreous
STREAK : White
MORPHOLOGY : Prismatic crystals, compact, flattened
HARDNESS : 5,0-5,5
DENSITY : 3,53

CHEMICAL CLASS : VIII - Silicates
GROUP : Titanite
STRUNZ CLASS BEFORE 2001 : 8/B.12-10
STRUNZ CLASS AFTER 2001 : 9.AG.15

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