Potassium sulfide

Most commonly, the term potassium sulfide refers loosely to this mixture, not the anhydrous solid.

It adopts "antifluorite structure," which means that the small K+ ions occupy the tetrahedral (F−) sites in fluorite, and the larger S2− centers occupy the eight-coordinate sites.

[3] It can be produced by heating K2SO4 with carbon (coke): In the laboratory, pure K2S may be prepared by the reaction of potassium and sulfur in anhydrous ammonia.

[4] Sulfide is highly basic, consequently K2S completely and irreversibly hydrolyzes in water according to the following equation: For many purposes, this reaction is inconsequential since the mixture of SH− and OH− behaves as a source of S2−.

[3] Potassium sulfides are formed when black powder is burned and are important intermediates in many pyrotechnic effects, such as senko hanabi and some glitter formulations.

Potassium sulfide
Potassium sulfide
Potassium sulfide
Powdered potassium sulfide anhydrous