phosphide

phos·phide

P0257600 (fŏs′fīd′)n. Trivalent phosphorus, or a compound of phosphorus, especially a binary compound of phosphorus with a more electropositive element.

phosphide

(ˈfɒsfaɪd) n (Elements & Compounds) any compound of phosphorus with another element, esp a more electropositive element

phos•phide

(ˈfɒs faɪd, -fɪd)

n. a binary compound of phosphorus with a basic element or group. [1840–50]

Translations

fosfuro

Phosphide

phosphide

[′fä‚sfīd] (inorganic chemistry) Binary compound of trivalent phosphorus, as in Na₃P.

Phosphide

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.

L. V. KUBASOVA

phosphide

phos·phide

(fos'fīd), A compound of phosphorus with valence -3, for example, sodium phosphide, Na₃P.

phos·phide

(fos'fīd) A compound of phosphorus with valence -3, e.g., sodium phosphide, Na₃P.

phosphide

(fos'fid) [? + phorein, to carry] A binary compound of phosphorus with an element or radical.

aluminum phosphide

A pesticide used to protect stored grains from insects and rodents. After exposure to water it is converted to hydrogen phosphide, a poison that inhibits cellular oxidative metabolism, esp. in metabolically active organs. It may be toxic or deadly to humans if ingested or inhaled. Its chemical formula is AlP.

Treatment

There is no specific antidote. Cardiopulmonary support is given to intoxicated patients.

hydrogen phosphide

A poison that is released when phosphide pesticides react with water. It inhibits oxidative metabolism in cells and may be deadly if eaten or inhaled. Chemical formula is PH₃. Synonym: phosphine

zinc phosphide

A toxic pesticide that releases hydrogen phosphide after exposure to water. Its chemical formula is Zn₃P₂.

单词	phosphide
释义	phosphide phos·phide P0257600 (fŏs′fīd′)n. Trivalent phosphorus, or a compound of phosphorus, especially a binary compound of phosphorus with a more electropositive element. phosphide (ˈfɒsfaɪd) n (Elements & Compounds) any compound of phosphorus with another element, esp a more electropositive element phos•phide (ˈfɒs faɪd, -fɪd) n. a binary compound of phosphorus with a basic element or group. [1840–50] Translations fosfuro Phosphide phosphide [′fä‚sfīd] (inorganic chemistry) Binary compound of trivalent phosphorus, as in Na₃P. Phosphide 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. L. V. KUBASOVA phosphide phos·phide (fos'fīd), A compound of phosphorus with valence -3, for example, sodium phosphide, Na₃P. phos·phide (fos'fīd) A compound of phosphorus with valence -3, e.g., sodium phosphide, Na₃P. phosphide (fos'fid) [? + phorein, to carry] A binary compound of phosphorus with an element or radical. aluminum phosphide A pesticide used to protect stored grains from insects and rodents. After exposure to water it is converted to hydrogen phosphide, a poison that inhibits cellular oxidative metabolism, esp. in metabolically active organs. It may be toxic or deadly to humans if ingested or inhaled. Its chemical formula is AlP. Treatment There is no specific antidote. Cardiopulmonary support is given to intoxicated patients. hydrogen phosphide A poison that is released when phosphide pesticides react with water. It inhibits oxidative metabolism in cells and may be deadly if eaten or inhaled. Chemical formula is PH₃. Synonym: phosphine zinc phosphide A toxic pesticide that releases hydrogen phosphide after exposure to water. Its chemical formula is Zn₃P₂.
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