Gold(II) Selenide

Gold(II) selenide, also known as AuSe, is a chemical compound composed of one gold atom and one selenium atom. The gold atom has a +2 oxidation state, while the selenium atom has a -2 oxidation state.

Gold(II) selenide is a black solid with a cubic crystal structure. It has a high melting point of 1,174°C and is insoluble in water but soluble in acids.

It can be prepared by reacting gold(III) chloride with sodium selenide in water under controlled conditions:

AuCl3 + Na2Se → AuSe + 2NaCl

Gold(II) selenide has potential applications in infrared devices and as a semiconductor material. Its electrical conductivity can be modified by doping with other elements such as cadmium or zinc.

It should be handled with care due to its toxic and potentially hazardous nature. Proper safety precautions should be taken during handling and disposal.