This article is about the mineral. For synthetic compounds, see Perovskite (structure). For solar cells using perovskite-structured compounds, see Perovskite solar cell.
Perovskite
Crystals of perovskite on matrix Size: 2.3 cm × 2.1 cm × 2.0 cm (0.9 in × 0.8 in × 0.8 in)
General
Category
Oxide minerals
Formula (repeating unit)
CaTiO3
IMA symbol
Prv[1]
Strunz classification
4.CC.30
Crystal system
Orthorhombic
Crystal class
Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
Space group
Pbnm
Identification
Formula mass
135.96 g/mol
Color
Black, reddish brown, pale yellow, yellowish orange
Crystal habit
Pseudo cubic – crystals show a cubic outline
Twinning
complex penetration twins
Cleavage
[100] good, [010] good, [001] good
Fracture
Conchoidal
Mohs scale hardness
5.0–5.5
Luster
Adamantine to metallic; may be dull
Streak
grayish white
Diaphaneity
Transparent to opaque
Specific gravity
3.98–4.26
Optical properties
Biaxial (+)
Refractive index
nα = 2.3, nβ = 2.34, nγ = 2.38
Other characteristics
non-radioactive, non-magnetic
References
[2][3][4][5]
Perovskite (pronunciation: /pəˈrɒvskaɪt/) is a calcium titanium oxide mineral composed of calcium titanate (chemical formula CaTiO3). Its name is also applied to the class of compounds which have the same type of crystal structure as CaTiO3, known as the perovskite structure, which has a general chemical formula A2+B4+(X2−)3.[6] Many different cations can be embedded in this structure, allowing the development of diverse engineered materials.[7]
^Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C. (eds.). "Perovskite" (PDF). Handbook of Mineralogy. Chantilly, VA: Mineralogical Society of America.
^Inoue, Naoki; Zou, Yanhui (2006). "Physical properties of perovskite-type lithium ionic conductor" (PDF). In Sakuma, Takashi; Takahashi, Haruyuki (eds.). Physics of Solid State Ionics. Research Signpost. pp. 247–269. ISBN 978-81-308-0070-7.
^Wenk, Hans-Rudolf; Bulakh, Andrei (2004). Minerals: Their Constitution and Origin. New York: Cambridge University Press. p. 413. ISBN 978-0-521-52958-7.
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