LaAgSi2 crystallizes in the orthorhombic Cmcm space group. La(1) is bonded in a 14-coordinate geometry to four equivalent Ag(1), four equivalent Si(2), and six equivalent Si(1) atoms. Ag(1) is bonded in a 12-coordinate geometry to four equivalent La(1), four equivalent Ag(1), and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to six equivalent La(1), one Si(2), and two equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to four equivalent La(1), four equivalent Ag(1), and one Si(1) atom.
LaAgSi2 crystallizes in the orthorhombic Cmcm space group. La(1) is bonded in a 14-coordinate geometry to four equivalent Ag(1), four equivalent Si(2), and six equivalent Si(1) atoms. There are two shorter (3.38 Å) and two longer (3.45 Å) La(1)-Ag(1) bond lengths. All La(1)-Si(2) bond lengths are 3.28 Å. There are two shorter (3.16 Å) and four longer (3.27 Å) La(1)-Si(1) bond lengths. Ag(1) is bonded in a 12-coordinate geometry to four equivalent La(1), four equivalent Ag(1), and four equivalent Si(2) atoms. All Ag(1)-Ag(1) bond lengths are 3.06 Å. There are two shorter (2.61 Å) and two longer (2.63 Å) Ag(1)-Si(2) bond lengths. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to six equivalent La(1), one Si(2), and two equivalent Si(1) atoms. The Si(1)-Si(2) bond length is 2.34 Å. Both Si(1)-Si(1) bond lengths are 2.42 Å. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to four equivalent La(1), four equivalent Ag(1), and one Si(1) atom.