Tausonite

 Tausonite is the rare naturally occurring mineral form of strontium titanate: chemical formula: SrTiO₃. It occurs as red to orange brown cubic crystals and crystal masses.

Tausonite
General
Category	Oxide mineral
Formula (repeating unit)	SrTiO3
Strunz classification	4.CC.35
Crystal system	Cubic
Crystal class	Hexoctahedral (m3m) H-M symbol: (4/m 3 2/m)
Space group	Pm3m
Unit cell	a = 3.9 Å; Z = 1
Identification
Color	Red, red-brown, orange, dark gray
Crystal habit	Cubic and octahedral crystals, granular, massive
Cleavage	None
Fracture	Conchoidal
Tenacity	Brittle
Mohs scale hardness	6-6.5
Luster	Adamantine
Diaphaneity	Translucent to opaque
Specific gravity	4.88
Optical properties	Isotropic
Refractive index	n = 2.40
References	[1][2][3]

It is a member of the perovskite group.

It was first described in 1982 for an occurrence in a syenite intrusive in Tausonite Hill, Murunskii Massif, Aldan Shield, Sakha Republic, Yakutia, Eastern-Siberian Region, Russia.^[1] It was named for Russian geochemist Lev Vladimirovich Tauson (1917–1989).^[3] It has also been reported from a fenite dike associated with a carbonatite complex in Sarambi, Concepción Department, Paraguay.^[2] and in high pressure metamorphic rocks along the Kotaki River area of Honshu Island, Japan.

This article uses material from the Wikipedia article  Metasyntactic variable, which is released under the  Creative Commons Attribution-ShareAlike 3.0 Unported License.