Perovskite

A variety of Minerals

Perovskite specimen - rock identification

What is Perovskite?

Perovskite (pronunciation: /pəˈrɒvskaɪt/) is a calcium titanium oxide mineral composed of calcium titanate (CaTiO3). Its name is also applied to the class of compounds which have the same type of crystal structure as CaTiO3 (ABX3), known as the perovskite structure. Many different cations can be embedded in this structure, allowing the development of diverse engineered materials.

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Key Characteristics

Characteristics of Perovskite

The stability of perovskite in igneous rocks is limited by its reaction relation with sphene. In volcanic rocks perovskite and sphene are not found together, the only exception being an etindite from Cameroon.

Formation of Perovskite

Found in the Earth's mantle, perovskite's occurrence at Khibina Massif is restricted to the silica under-saturated ultramafic rocks and foidolites, due to the instability in a paragenesis with feldspar. Perovskite occurs as small anhedral to subhedral crystals filling interstices between the rock-forming silicates. Perovskite is found in contact carbonate skarns at Magnet Cove, Arkansas, in altered blocks of limestone ejected from Mount Vesuvius, in chlorite and talc schist in the Urals and Switzerland, and as an accessory mineral in alkaline and mafic igneous rocks, nepheline syenite, melilitite, kimberlites and rare carbonatites. Perovskite is a common mineral in the Ca-Al-rich inclusions found in some chondritic meteorites. A rare-earth-bearing variety knopite ((Ca,Ce,Na)(Ti,Fe)O3) is found in alkali intrusive rocks in the Kola Peninsula and near Alnö, Sweden. A niobium-bearing variety dysanalyte occurs in carbonatite near Schelingen, Kaiserstuhl, Germany.

Quick Facts

Physical Properties

Color
Dark brown, black, red-brown, yellow shades
Hardness (Mohs)
5.5
Density
4.02 g/cm³
Streak
Colourless, greyish white

Chemical Properties

Chemical Formula
CaTiO3
Elements
Ca, O, Ti

Also Known As

PerovskitePerofskiteUhligite (of Hauser)
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