Also found in: Dictionary, Medical, Wikipedia.
Related to Phosphide: Gallium phosphide


(inorganic chemistry)
Binary compound of trivalent phosphorus, as in Na3P.



any of the compounds of phosphorus with metals or with nonmetals, such as B, Si, and As, that are more electropositive than phosphorus. Phosphides of nontransition metals and of metals of the copper subgroup, which have the compositions Me3P and Me2P5 in the case of alkali metals, Me3P2 with alkaline-earth metals, and Me3P and MeP2 with metals of the copper subgroup (Me denoting the metal), are ionic, saltlike compounds. Phosphides of alkali and alkaline-earth metals are readily decomposed by water and dilute acids, phosphine being liberated in the process. Phosphides of alkaline-earth metals and metals of the copper subgroup are not stable at elevated temperatures; at relatively high phosphorus concentrations, these phosphides are semiconducting.

Phosphides of transition metals (CrP, MoP, TiP), including lanthanides and actinides (LaP, PuP, U3P4), are chemically stable and do not decompose in water or dilute acids; their physical properties are close to those of either semiconductors (UP, NbP, MnP) or metals (TiP, ZrP). The phosphides of boron, aluminum, and indium are covalent compounds that are high-melting and semiconducting. Phosphides also include volatile molecular compounds, such as those with sulfur, selenium, and tellurium.

Phosphides are formed by a synthesis of the elements at temperatures of 600°–1200°C in a vacuum or atmosphere of inert gases; by the reaction of phosphine with metals and nonmetals or with the corresponding oxides; by the double exchange of phosphine with halides or sulfides, for example, B2S3 + 2PH3 = 2BP + 3H2S; and by the reduction of metal phosphates by hydrogen at high temperatures.

A number of phosphides (InP, GaP) have great importance as semiconductor materials. Zinc phosphide is used as a rodenticide. Phosphides are used in certain nonferrous alloys, such as phosphor bronze, for deoxidation and improvement of antifriction properties. The tendency of certain phosphides to decompose with the liberation of phosphines, which ignite spontaneously in air, is used in the production of signal devices.


References in periodicals archive ?
The effects of different sub lethal concentrations of aluminium phosphide on lipid peroxidation in the form of TBARS formation and the responses of other antioxidant enzymes (GP, CAT and SOD) in the liver and gill tissues of C.
The oxide precursor was pelletized and sieved to 60/80 mesh, then reduced to phosphide by temperature programmed reduction in flowing H 2 at 923K for 2h (heating to 623 K in 0.
Orally taken zinc phosphide reacts with water and acid in the stomach and produces phosphine gas, which accounts for a large part of the observed toxicity.
The integration on silicon of efficient indium phosphide based light sources, currently driving long-range telecommunication networks, is known to be very challenging, owing to the large mismatch in crystal lattice constants between both materials.
According to AXT, Indium phosphide is rapidly emerging as a material of choice for both new and existing applications, including optoelectronic devices for fiber optic telecommunications, passive optical networks, and data centre connectivity, as well as solar cells and next-generation wireless amplifiers.
It is illegal to use aluminium phosphide in residential areas.
The UAE is exploring safer alternatives to the killer pesticide aluminium phosphide which has claimed many lives in the country after being illegally used to fumigate houses.
Aluminum phosphide is a cheap solid fumigant and a highly toxic pesticide.
If you're looking for materials that have good photoelectrical properties, zinc phosphide is one of them," says Jillian Buriak, professor of chemistry at U of A.
In Table 1 serum activities of hepatic enzymes; namely ALT, AST, ALP and [gamma]-GT of rats fed phosphide powder residue contaminated cowpea were significantly increased (p<0.
Key Words: Magnesium sulphate, Wheat pill, Aluminum phosphide, Phosphine, Cardiotoxin