EuRhSi3 crystallizes in the tetragonal I4mm space group. Eu(1) is bonded in a 16-coordinate geometry to four equivalent Rh(1), four equivalent Si(1), and eight equivalent Si(2) atoms. Rh(1) is bonded in a 5-coordinate geometry to four equivalent Eu(1), one Si(1), and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a distorted single-bond geometry to four equivalent Eu(1), one Rh(1), and four equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a distorted bent 120 degrees geometry to four equivalent Eu(1), two equivalent Rh(1), and two equivalent Si(1) atoms.
EuRhSi3 crystallizes in the tetragonal I4mm space group. Eu(1) is bonded in a 16-coordinate geometry to four equivalent Rh(1), four equivalent Si(1), and eight equivalent Si(2) atoms. All Eu(1)-Rh(1) bond lengths are 3.34 Å. All Eu(1)-Si(1) bond lengths are 3.10 Å. There are four shorter (3.17 Å) and four longer (3.33 Å) Eu(1)-Si(2) bond lengths. Rh(1) is bonded in a 5-coordinate geometry to four equivalent Eu(1), one Si(1), and four equivalent Si(2) atoms. The Rh(1)-Si(1) bond length is 2.38 Å. All Rh(1)-Si(2) bond lengths are 2.36 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a distorted single-bond geometry to four equivalent Eu(1), one Rh(1), and four equivalent Si(2) atoms. All Si(1)-Si(2) bond lengths are 2.58 Å. In the second Si site, Si(2) is bonded in a distorted bent 120 degrees geometry to four equivalent Eu(1), two equivalent Rh(1), and two equivalent Si(1) atoms.