| 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]
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ "Prehnit (Prehnite)". Mineralienatlas.de.
- ^ "Perovskite". Webmineral.
- ^ 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.
- ^ Szuromi, Phillip; Grocholski, Brent (2017). "Natural and engineered perovskites". Science. 358 (6364): 732–733. Bibcode:2017Sci...358..732S. doi:10.1126/science.358.6364.732. PMID 29123058.