LiOs2N3 crystallizes in the orthorhombic Cmc2_1 space group. Li(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form LiN4 tetrahedra that share corners with two equivalent Li(1)N4 tetrahedra and corners with ten equivalent Os(1)N4 tetrahedra. Os(1) is bonded to one N(2) and three equivalent N(1) atoms to form distorted OsN4 tetrahedra that share corners with five equivalent Li(1)N4 tetrahedra and corners with seven equivalent Os(1)N4 tetrahedra. There are two inequivalent N sites. In the first N site, N(2) is bonded to two equivalent Li(1) and two equivalent Os(1) atoms to form NLi2Os2 tetrahedra that share corners with two equivalent N(2)Li2Os2 tetrahedra and corners with ten equivalent N(1)LiOs3 trigonal pyramids. In the second N site, N(1) is bonded to one Li(1) and three equivalent Os(1) atoms to form NLiOs3 trigonal pyramids that share corners with five equivalent N(2)Li2Os2 tetrahedra and corners with seven equivalent N(1)LiOs3 trigonal pyramids.
LiOs2N3 crystallizes in the orthorhombic Cmc2_1 space group. Li(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form LiN4 tetrahedra that share corners with two equivalent Li(1)N4 tetrahedra and corners with ten equivalent Os(1)N4 tetrahedra. Both Li(1)-N(1) bond lengths are 2.11 Å. There is one shorter (2.10 Å) and one longer (2.14 Å) Li(1)-N(2) bond length. Os(1) is bonded to one N(2) and three equivalent N(1) atoms to form distorted OsN4 tetrahedra that share corners with five equivalent Li(1)N4 tetrahedra and corners with seven equivalent Os(1)N4 tetrahedra. The Os(1)-N(2) bond length is 1.90 Å. There are a spread of Os(1)-N(1) bond distances ranging from 1.95-2.00 Å. There are two inequivalent N sites. In the first N site, N(2) is bonded to two equivalent Li(1) and two equivalent Os(1) atoms to form NLi2Os2 tetrahedra that share corners with two equivalent N(2)Li2Os2 tetrahedra and corners with ten equivalent N(1)LiOs3 trigonal pyramids. In the second N site, N(1) is bonded to one Li(1) and three equivalent Os(1) atoms to form NLiOs3 trigonal pyramids that share corners with five equivalent N(2)Li2Os2 tetrahedra and corners with seven equivalent N(1)LiOs3 trigonal pyramids.