Sulfur–selenium isomorphous substitution and polymorphism in the Ag2(S,Se) series

Defect-free and crystallinity-preserving ductile deformation in semiconducting Ag2S

“…Among inorganic semiconductors, silver sulfide (Ag 2 S) is receiving a lot of attention as a key material toward next-generation flexible devices [2][3][4][5][6][7][8][9][10][11] . There are several phases of crystalline Ag 2 S, including a high-temperature (> 450 K) cubic phase (c-Ag 2 S) that exhibits superionic conduction, and a low-temperature monoclinic phase (m-Ag 2 S), which is a semiconductor [12][13][14] .…”

The crystal structure of uytenbogaardtite, Ag3AuS2, and its relationships with gold and silver sulfides-selenides

“…Indeed, the shortest Ag-Ag bonds in Ag 3 AuSSe and Ag 3 AuS 1.5 Se 0.5 are equal to 2.99 and 3.01 Å, respectively, whereas the calculated value for the model petzite-like structure of Ag 3 AuS 2 is 2.93 Å (Seryotkin et al, 2013a). A morphotropic transition of the same nature may be found in another chalcogenide series between acanthite, Ag 2 S (Frueh, 1958) and naummanite, Ag 2 Se (Pingitore et al, 1992;Seryotkin et al, 2015). The compounds have a distorted anion bcc arrangement with Ag + in planar trigonal and distorted tetrahedral coordinations.…”

“…There are short Ag-Ag distances ranging in the interval 2.9-3.0 Å in the structure of naumannite. Partial substitution of selenium by sulfur results in a further shortening of the distances (Seryotkin et al, 2015). In the structure of acanthite the distribution of cations is slightly different and all Ag-Ag distances are ≥ 3.0 Å.…”