Strontium Phosphide

Strontium phosphide is an inorganic compound of strontium and phosphorus with the chemical formula Sr₃P₂.^[1][2] The compound looks like black crystalline material.^{[citation needed]}

Heating strontium phosphate with soot in an arc furnace:

${\displaystyle \mathrm{S}\mathrm{r}{\phantom{A}}_3(\mathrm{P}\mathrm{O}{\phantom{A}}_4){\phantom{A}}_2+8\mathrm{C}⟶\mathrm{S}\mathrm{r}{\phantom{A}}_3\mathrm{P}{\phantom{A}}_2+8\mathrm{C}\mathrm{O}}$

Reaction of strontium with red phosphorus at high temperature:^{[citation needed]}

${\displaystyle 6\mathrm{S}\mathrm{r}+\mathrm{P}{\phantom{A}}_4⟶2\mathrm{S}\mathrm{r}{\phantom{A}}_3\mathrm{P}{\phantom{A}}_2}$

Strontium phosphide forms black crystals.^{[citation needed]}

Thermally stable, melts at high temperatures.

Dangerous when wet, poison.^[3]

Decomposes with water releasing phosphine:^{[citation needed]}

${\displaystyle \mathrm{S}\mathrm{r}{\phantom{A}}_3\mathrm{P}{\phantom{A}}_2+2\mathrm{H}{\phantom{A}}_2\mathrm{O}⟶3\mathrm{S}\mathrm{r}(\mathrm{O}\mathrm{H}){\phantom{A}}_2+2\mathrm{P}\mathrm{H}{\phantom{A}}_3}$

Reacts with acids:

${\displaystyle \mathrm{S}\mathrm{r}{\phantom{A}}_3\mathrm{P}{\phantom{A}}_2+6\mathrm{H}\mathrm{C}\mathrm{l}⟶3\mathrm{S}\mathrm{r}\mathrm{C}\mathrm{l}{\phantom{A}}_2+2\mathrm{P}\mathrm{H}{\phantom{A}}_3}$

It is a highly reactive substance used as a reagent and in the manufacture of chemically reactive devices.^[4]

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