USiSe crystallizes in the tetragonal I4/mmm space group. U(1) is bonded in a 9-coordinate geometry to four equivalent Si(1) and five equivalent Se(1) atoms. Si(1) is bonded in a distorted body-centered cubic geometry to four equivalent U(1) and four equivalent Si(1) atoms. Se(1) is bonded to five equivalent U(1) atoms to form a mixture of distorted edge and corner-sharing SeU5 trigonal bipyramids.
USiSe crystallizes in the tetragonal I4/mmm space group. U(1) is bonded in a 9-coordinate geometry to four equivalent Si(1) and five equivalent Se(1) atoms. All U(1)-Si(1) bond lengths are 2.93 Å. There are four shorter (2.88 Å) and one longer (3.05 Å) U(1)-Se(1) bond length. Si(1) is bonded in a distorted body-centered cubic geometry to four equivalent U(1) and four equivalent Si(1) atoms. All Si(1)-Si(1) bond lengths are 2.75 Å. Se(1) is bonded to five equivalent U(1) atoms to form a mixture of distorted edge and corner-sharing SeU5 trigonal bipyramids.