Title: Silver Sulfide

CAS Registry Number: 21548-73-2

Additional Names: Argentous sulfide

Molecular Formula: Ag2S

Molecular Weight: 247.80

Percent Composition: Ag 87.06%, S 12.94%

Literature References: Occurs in nature as the mineral argentite. Usually prepd from the elements: Hönigschmid, Sachtleben, Z. Anorg. Allg. Chem. 195, 207 (1931).

Properties: Grayish-black, heavy powder. The cryst structure is orthorhombic, changing to cubic when heated above 179°. d420 7.234. mp 845°. Insol in water. Sol in nitric acid, in solns of alkali cyanides.

Melting point: mp 845°

Density: d420 7.234

Use: In ceramics.