Perovskite
Mineral whose structure enables diverse engineered materials.
Perovskite is an orthorhombic calcium titanium oxide mineral composed of calcium titanate (CaTiO3). Its name is also applied to the class of compounds that share the same crystal structure, known as the perovskite structure, which has a general chemical formula A2+B4+(X2−)3 for chalcogen perovskites or A1+B2+(X1−)3 for halogen perovskites. This structure allows many different cations to be embedded, enabling the development of diverse engineered materials, including those used in modern photovoltaics like photodiodes and solar panels.
- discoverer
- Gustav Rose
- location
- Ural Mountains, Russia
- crystal_system
- Orthorhombic (pseudocubic)
- chemical_formula
- CaTiO3
- notable_for
- Perovskite structure class; used in photovoltaics
Reader's Guide
Perovskite is significant as the namesake for a broad class of compounds with the same crystal structure, which can accommodate a wide variety of cations. This structural flexibility has enabled the development of engineered materials for applications including photovoltaics, where halogen perovskites are used in photodiodes and solar panels. The mineral itself occurs in diverse geological settings, from the Earth's mantle to chondritic meteorites, and its formation in stars and brown dwarfs depletes titanium oxide in their photospheres, defining the transition between cool M-dwarf stars and colder L-dwarfs. The perovskite structure's stability is characterized by the Goldschmidt tolerance factor, and its derivatives, such as double perovskites, exhibit ordering that modifies electronic, magnetic, and transport properties, leading to functional materials for magnetism, ferroelectricity, catalysis, and energy conversion.
Did You Know?
- Perovskite formation in stars depletes titanium oxide, defining the transition between M-dwarf and L-dwarf stars.
- A rare-earth-bearing variety of perovskite, knopite, is found in alkali intrusive rocks in the Kola Peninsula.
Frequently Asked Questions
Who discovered Perovskite and where was it first found?
Gustav Rose identified this calcium titanate mineral in the Ural Mountains of Russia. It crystallizes in an orthorhombic system that often looks nearly cubic at first glance.
What is Perovskite's chemical formula?
The mineral's composition is CaTiO3, making it a calcium titanium oxide. That deceptively simple formula underpins an entire family of compounds that share the same crystal architecture.
What is the 'perovskite structure' and why is it so versatile?
It is a crystal lattice described by the general formula A2+B4+(X2−)3 for chalcogen variants or A1+B2+(X1−)3 for halogen variants. Because the framework can swap in many different cations without collapsing, it serves as a template for engineering a wide range of functional materials.
How does Perovskite connect to modern solar-panel technology?
The structural flexibility of the perovskite lattice lets scientists tune compositions for efficient light absorption and charge transport. That is why perovskite-based compounds are now central to next-generation photovoltaics such as photodiodes and thin-film solar cells.
What crystal system does Perovskite belong to?
It forms in the orthorhombic system, though its unit cell frequently appears almost cubic, a trait often called pseudocubic. That near-symmetry is one reason the lattice tolerates so many substitutions.
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