How is Silver(1+) sulfidosilver (CAS: 21548-73-2) typically synthesized?

Silver(1+) sulfidosilver is commonly synthesized by reducing silver nitrate with sodium sulfide in an aqueous solution. The reaction can be carried out at room temperature, and the yield is generally good. Catalysts such as ethylenediaminetetraacetic acid (EDTA) can be used to improve the selectivity of the reaction. The product is usually filtered and washed to remove any unreacted silver ions and sodium sulfide.