FACTOID # 19: Cheap sloppy joes: Looking for reduced-price lunches for schoolchildren? Head for Oklahoma!
 
 Home   Encyclopedia   Statistics   States A-Z   Flags   Maps   FAQ   About 
   
 
WHAT'S NEW
RELATED ARTICLES
People who viewed "Perovskite" also viewed:
 

SEARCH ALL

FACTS & STATISTICS    Advanced view

Search encyclopedia, statistics and forums:

 

 

(* = Graphable)

 

 


Encyclopedia > Perovskite

Perovskite (calcium titanium oxide, CaTiO3) is a relatively rare mineral occurring in orthorhombic (pseudocubic) crystals. Perovskite is found in contact metamorphic rocks and associated mafic intrusives, nepheline syenites, and rare carbonatites. Perovskite was discovered in the Ural mountains of Russia by Gustav Rose in 1839 and named for Russian mineralogist, L. A. Perovski (1792-1856). General Name, Symbol, Number calcium, Ca, 20 Chemical series alkaline earth metals Group, Period, Block 2, 4, s Appearance silvery white Atomic mass 40. ... General Name, Symbol, Number titanium, Ti, 22 Chemical series transition metals Group, Period, Block 4, 4, d Appearance silvery metallic Atomic mass 47. ... An oxide is a chemical compound of oxygen with other chemical elements. ... This article is about minerals in the geologic sense; for nutrient minerals see dietary mineral; for the band see Mineral (band). ... In crystallography, the orthorhombic crystal system is one of the 7 lattice point groups. ... Quartz crystal A crystal is a solid in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating pattern extending in all three spatial dimensions. ... Metamorphic rock is the result of the transformation of a pre-existing rock type, the protolith, in a process called metamorphism, which means change in form, derived from the Greek words meta, change, and morphe, form. The protolith is subjected to extreme heat (>150 degrees Celsius) and pressure causing profound... In geology, mafic minerals are silicate minerals, magmas, and volcanic and intrusive igneous rocks that have relatively high concentrations of the heavier elements. ... Pluton redirects here. ... Nephelite, also called nepheline, is a feldspathoid -- a silica-undersaturated aluminosilicate, Na,K) AlSiO4, that occurs in intrusive and volcanic rocks undersaturated with silica, and in their pegmatites. ... Syenite Syenite is a coarse-grained intrusive igneous rock of the same general composition as granite but with the quartz either absent or present in relatively small amounts. ... Carbonatites are intrusive igneous rock structures with more than 50% carbonate content, many of which contain distinctive abundances of apatite, magnetite, barite, and fluorite, that may contain economic or anomalous concentrations of rare earth elements, phosphorus, niobium, uranium, thorium, copper, iron, titanium, barium, fluorine, zirconium, and other rare or incompatible... See: Ural Mountains Ural River IMZ-Ural Russian motorcycle Ural automobile This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ...


Under the high pressure conditions of the mantle the pyroxene enstatite, MgSiO3, is a perovskite polymorph and may be the most common mineral in the Earth. Earth cutaway from core to exosphere. ... Figure 1:Mantle-peridotite xenolith with green peridot olivine and black pyroxene crystals from San Carlos Indian Reservation, Gila Co. ... The pyroxene silicate minerals enstatite (MgSiO3) and ferrosilite (FeSiO3) form a complete solid solution series and are common rock-forming minerals found in igneous and metamorphic rocks and meteorites. ... In general, a polymorph is something that can exist in several states or forms. ...


It is also the name of a more general group of crystals which take the same structure. See perovskite structure for details. The basic chemical formula follows the pattern ABO3, where A and B are cations of different sizes (for example, LaMnO3). The idealized structure is approximately a face-centered cube, but differences in sizes between the A and B cations can distort the structure to an octahedral form. Rose des Sables (Sand Rose), formed of gypsum crystals In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ... The perovskite structure is adopted by many oxides with formula ABO3 and is very versatile having many useful technological applications such as ferroelectrics, catalysts, sensors and superconductors. ... A cation is an ion with positive charge. ...


The perovskite structure shares the property of ferroelectricity with garnet and olivine. Many superconducting ceramic materials share the structure. In physics, the ferroelectric effect is an electrical phenomenon whereby certain ionic crystals may exhibit a spontaneous dipole moment. ... The garnet group of minerals show crystals with a habit of rhombic dodecahedrons and trapezohedrons. ... Olivine The mineral olivine is a magnesium iron silicate with the formula (Mg,Fe)2SiO4 in which the ratio of magnesium and iron varies between the two endmembers of the series: forsterite (Mg-rich) and fayalite (Fe-rich). ... Superconductivity is a phenomenon occurring in certain materials at low temperatures, characterised by the complete absence of electrical resistance and the damping of the interior magnetic field (the Meissner effect. ... Crown The word ceramic is derived from the Greek word κεραμικος (keramikos, having to do with pottery). The term covers inorganic non-metallic materials whose formation is due to the action of heat. ...


See also

A diamond anvil, more properly a diamond anvil cell (DAC), is a device used by physicists to exert extreme pressures on a material. ... Gem animals. ...

  Results from FactBites:
 
Perovskite - Wikipedia, the free encyclopedia (196 words)
Perovskite is found in contact metamorphic rocks and associated mafic intrusives, nepheline syenites, and rare carbonatites.
Perovskite was discovered in the Ural mountains of Russia by Gustav Rose in 1839 and named for Russian mineralogist, L. Perovski (1792-1856).
The perovskite structure shares the property of ferroelectricity with garnet and olivine.
  More results at FactBites »

 
 

COMMENTARY     


Share your thoughts, questions and commentary here
Your name
Your comments

Want to know more?
Search encyclopedia, statistics and forums:

 


Press Releases |  Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms, 1022, m