Materials Data on Ag2S by Materials Project

Ag2S crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of one Ag2S sheet oriented in the (-1, 0, 2) direction. there are two inequivalent Ag1+ sites. In the first Ag1+ site, Ag1+ is bonded in a distorted linear geometry to two equivalent S2- atoms. There are one shorter (2.42 Å) and one longer (2.43 Å) Ag–S bond lengths. In the second Ag1+ site, Ag1+ is bonded in a bent 150 degrees geometry to two equivalent S2- atoms. There are one shorter (2.48 Å) and one longer (2.50 Å) Ag–S bond lengths. S2- is bonded in a distorted rectangular see-saw-like geometry to four Ag1+ atoms.

硫化银(Ag₂S)属于单斜晶系P2₁/c空间群。该晶体为二维结构，包含一片沿(-1, 0, 2)晶向排布的硫化银片层。体系中存在两个不等价的银(I)阳离子(Ag⁺)位点。在第一个银(I)位点中，Ag⁺采取畸变直线型配位，与两个等价的硫离子(S²⁻)成键，对应的Ag-S键长分别为较短的2.42 Å与较长的2.43 Å。在第二个银(I)位点中，Ag⁺采取150°弯折型配位，与两个等价的硫离子(S²⁻)成键，对应的Ag-S键长分别为较短的2.48 Å与较长的2.50 Å。硫离子(S²⁻)采取畸变矩形跷跷板型配位，与四个银(I)阳离子(Ag⁺)成键。