Materials Data on K6Na15Tl18H by Materials Project

Dataset · Thu Apr 30 04:00:00 EDT 2020

DOI:https://doi.org/10.17188/1287702· OSTI ID:1287702

K6Na15Tl18H crystallizes in the cubic Pm-3 space group. The structure is three-dimensional. K is bonded in a 6-coordinate geometry to one K, eight Na, and six equivalent Tl atoms. The K–K bond length is 4.06 Å. There are a spread of K–Na bond distances ranging from 3.89–4.12 Å. There are four shorter (3.76 Å) and two longer (3.82 Å) K–Tl bond lengths. There are three inequivalent Na sites. In the first Na site, Na is bonded to twelve equivalent Tl atoms to form corner-sharing NaTl12 cuboctahedra. All Na–Tl bond lengths are 3.25 Å. In the second Na site, Na is bonded in a 6-coordinate geometry to three equivalent K and six Tl atoms. There are three shorter (3.35 Å) and three longer (3.38 Å) Na–Tl bond lengths. In the third Na site, Na is bonded to four equivalent K and four Tl atoms to form distorted NaK4Tl4 tetrahedra that share corners with two equivalent NaTl12 cuboctahedra, corners with two equivalent HTl6 octahedra, corners with eight equivalent NaK4Tl4 tetrahedra, an edgeedge with one NaK4Tl4 tetrahedra, and a faceface with one NaK4Tl4 tetrahedra. The corner-sharing octahedral tilt angles are 32°. There are two shorter (3.27 Å) and two longer (3.53 Å) Na–Tl bond lengths. There are two inequivalent Tl sites. In the first Tl site, Tl is bonded in a 1-coordinate geometry to six Na and one H atom. The Tl–H bond length is 2.45 Å. In the second Tl site, Tl is bonded in a 12-coordinate geometry to three equivalent K, four Na, and five equivalent Tl atoms. There are one shorter (3.39 Å) and four longer (3.42 Å) Tl–Tl bond lengths. H is bonded to six equivalent Tl atoms to form HTl6 octahedra that share corners with twelve equivalent NaK4Tl4 tetrahedra.

• Research Organization: LBNL Materials Project; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Contributing Organization: The Materials Project; MIT; UC Berkeley; Duke; U Louvain
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1287702
• Report Number(s): mp-733675
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
H-K-Na-Tl
K6Na15Tl18H
crystal structure