Pr3AgSiSe7 crystallizes in the hexagonal P6_3 space group. Pr(1) is bonded in a 8-coordinate geometry to one Se(3), three equivalent Se(1), and four equivalent Se(2) atoms. Ag(1) is bonded in a trigonal planar geometry to three equivalent Se(2) atoms. Si(1) is bonded in a tetrahedral geometry to one Se(3) and three equivalent Se(1) atoms. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Pr(1) and one Si(1) atom. In the second Se site, Se(2) is bonded in a 5-coordinate geometry to four equivalent Pr(1) and one Ag(1) atom. In the third Se site, Se(3) is bonded in a distorted tetrahedral geometry to three equivalent Pr(1) and one Si(1) atom.
Pr3AgSiSe7 crystallizes in the hexagonal P6_3 space group. Pr(1) is bonded in a 8-coordinate geometry to one Se(3), three equivalent Se(1), and four equivalent Se(2) atoms. The Pr(1)-Se(3) bond length is 3.24 Å. There are a spread of Pr(1)-Se(1) bond distances ranging from 3.03-3.24 Å. There are a spread of Pr(1)-Se(2) bond distances ranging from 3.07-3.25 Å. Ag(1) is bonded in a trigonal planar geometry to three equivalent Se(2) atoms. All Ag(1)-Se(2) bond lengths are 2.58 Å. Si(1) is bonded in a tetrahedral geometry to one Se(3) and three equivalent Se(1) atoms. The Si(1)-Se(3) bond length is 2.27 Å. All Si(1)-Se(1) bond lengths are 2.31 Å. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Pr(1) and one Si(1) atom. In the second Se site, Se(2) is bonded in a 5-coordinate geometry to four equivalent Pr(1) and one Ag(1) atom. In the third Se site, Se(3) is bonded in a distorted tetrahedral geometry to three equivalent Pr(1) and one Si(1) atom.