Gallium(III) selenide ( Ga₂ Se₃) is a

chemical compound A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by chemical bonds. A molecule consisting of atoms of only one element ...

. It has a defect sphalerite (cubic form of ZnS) structure. It is a p-type semiconductor Temperature dependence of electrical conductivity and Hall effect of Ga₂Se₃ single crystal, A. E. Belal, Dr. H. A. El-shaikh, I. A. Ashraf Crystal Research and Technology,30, 1 , 135 - 139 It can be formed by union of the elements. It hydrolyses slowly in water and quickly in mineral acids to form toxic

hydrogen selenide Hydrogen selenide is an inorganic compound with the formula H2Se. This hydrogen chalcogenide is the simplest and most commonly encountered hydride of selenium. H2Se is a colorless, flammable gas under standard conditions. It is the most toxic sel ...

gas. The reducing capabilities of the selenide ion make it vulnerable to oxidizing agents. It is advised therefore that it not come into contact with bases.

References

Selenides Gallium compounds Semiconductor materials {{inorganic-compound-stub