Oxypnictide

In chemistry, oxypnictides are a class of materials composed of <a href="/facts/Oxygen/acyn6o8r">oxygen</a>, a <a href="/facts/Pnictogen/jX4hvCkK">pnictogen</a> (group-V, especially phosphorus and arsenic) and one or more other elements. Although this group of compounds has been recognized since 1995, 
interest in these compounds increased dramatically after the publication of the superconducting properties of LaOFeP and LaOFeAs which were discovered in 2006 
and 2008. 
In these experiments the oxide was partly replaced by fluoride.
These and related compounds (e.g. the <a href="/facts/122_iron_arsenide/s9dpGfk3">122 iron arsenides</a>) form a new group of <a href="/facts/Iron-based_superconductor/SCoUWGmS">iron-based superconductors</a> known as iron pnictides or ferropnictides since the oxygen is not essential but the iron seems to be.
Oxypnictides have been patented as magnetic <a href="/facts/Semiconductor/zFf3mGTE">semiconductors</a> in early 2006.
The different subclasses of oxypnictides are <a href="/facts/Oxynitride/MRxCb4xX">oxynitrides</a>, <a href="/facts/Oxyphosphides/TFh3x70S">oxyphosphides</a>, <a href="/facts/Oxyarsenides/SUwzJS72">oxyarsenides</a>, oxyantimonides, and <a href="/facts/Oxybismuthides/11dBHMI9">oxybismuthides</a>.

Oxypnictide open-in-new

Oxypnictide