SEARCH · Engineering Papers
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
AuTl2 is Khatyrkite structured and crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. Au is bonded in a 10-coordinate geometry to two equivalent Au and eight equivalent Tl atoms. Both Au–Au bond lengths are 2.88 Å. All Au–Tl bond lengths are 3.17 Å. Tl is bonded in a 4-coordinate geometry to four equivalent Au atoms.
AuTl2 crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. Au is bonded to two equivalent Au and four equivalent Tl atoms to form distorted corner-sharing AuTl4Au2 octahedra. The corner-sharing octahedra tilt angles range from 0–43°. Both Au–Au bond lengths are 2.75 Å. All Au–Tl bond lengths are 2.97 Å. Tl is bonded in a distorted bent 150 degrees geometry to two equivalent Au atoms.
Au3Tl is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Au+0.33- sites. In the first Au+0.33- site, Au+0.33- is bonded to eight Au+0.33- and four equivalent Tl1+ atoms to form distorted AuTl4Au8 cuboctahedra that share corners with twelve equivalent AuTl4Au8 cuboctahedra, edges with eight equivalent AuTl4Au8 cuboctahedra, edges with eight equivalent TlAu12 cuboctahedra, faces with four equivalent TlAu12 cuboctahedra, and faces with ten equivalent AuTl4Au8 cuboctahedra. There are four shorter (2.97 Å) and four longer (3.11 Å) Au–Au bond lengths. All Au–Tl bond lengths are 3.11 Å. In the second Au+0.33- site, Au+0.33- is bonded in a square co-planar geometry to eight equivalent Au+0.33- and four equivalent Tl1+ atoms. All Au–Tl bond lengths are 2.97 Å. Tl1+ is bonded to twelve Au+0.33- atoms to form TlAu12 cuboctahedra that share corners with four equivalent TlAu12 cuboctahedra, edges with eight equivalent TlAu12 cuboctahedra, edges with sixteen equivalent AuTl4Au8 cuboctahedra, faces with four equivalent TlAu12 cuboctahedra, and faces with eight equivalent AuTl4Au8 cuboctahedra.
AuTl3 crystallizes in the cubic Pm-3n space group. The structure is three-dimensional. Au is bonded to twelve equivalent Tl atoms to form a mixture of edge and face-sharing AuTl12 cuboctahedra. All Au–Tl bond lengths are 3.40 Å. Tl is bonded in a 6-coordinate geometry to four equivalent Au and two equivalent Tl atoms. Both Tl–Tl bond lengths are 3.04 Å.
AuTl3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Au is bonded to twelve equivalent Tl atoms to form a mixture of face and corner-sharing AuTl12 cuboctahedra. All Au–Tl bond lengths are 3.39 Å. Tl is bonded in a distorted square co-planar geometry to four equivalent Au atoms.