Low-Temperature Predicted Structures of AgS (Silver Sulfide).

Silver sulfide phases, such as body-centered cubic argentite and monoclinic acanthite, are widely known. Traditionally, acanthite is regarded as the only low-temperature phase of silver sulfide. However, the possible existence of other low-temperature phases of silver sulfide cannot be ruled out.

Polymorphic Phase Transformations in Nanocrystalline AgS Silver Sulfide in a Wide Temperature Interval and Influence of Nanostructured AgS on the Interface Formation in AgS/ZnS Heteronanostructure.

Phase transformations that take place in nanocrystalline AgS silver sulfide have been systematically studied at temperatures from 298 to 893 K. The crystal structures of the polymorphic modifications -AgS, -AgS, and -AgS of nanocrystalline AgS have been found. It is established that the interstitial spacings between ions of silver in the superionic phases -AgS and -AgS are noticeably smaller than diameter of the Ag ion.

Synthesis of AgS colloidal solutions in DO heavy water.

For the first time, colloidal solutions of silver sulfide are synthesized by chemical deposition from solutions of silver nitrate and sodium sulfide in heavy water DO. In the synthesis, sodium citrate was used as a stabilizer. The sizes of AgS quantum dots in colloidal solutions were estimated by dynamic light scattering and transmission electron microscopy.