Materials Data on Na3ThB24 by Materials Project
Na3ThB24 is Calcium hexaboride-derived structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. there are two inequivalent Na sites. In the first Na site, Na is bonded in a 12-coordinate geometry to twenty-four B atoms. There are a spread of Na–B bond distances ranging from 2.93–3.20 Å. In the second Na site, Na is bonded in a 8-coordinate geometry to twenty-four B atoms. There are eight shorter (3.05 Å) and sixteen longer (3.06 Å) Na–B bond lengths. Th is bonded in a 1-coordinate geometry to twenty-four B atoms. There are sixteen shorter (3.03 Å) and eight longer (3.04 Å) Th–B bond lengths. There are six inequivalent B sites. In the first B site, B is bonded in a 1-coordinate geometry to four equivalent Th and five B atoms. There is one shorter (1.62 Å) and four longer (1.75 Å) B–B bond length. In the second B site, B is bonded in a 1-coordinate geometry to four equivalent Na and five B atoms. There is one shorter (1.67 Å) and four longer (1.77 Å) B–B bond length. In the third B site, B is bonded in a 1-coordinate geometry to four equivalent Na and five B atoms. There is one shorter (1.66 Å) and four longer (1.77 Å) B–B bond length. In the fourth B site, B is bonded in a 1-coordinate geometry to four equivalent Na and five B atoms. All B–B bond lengths are 1.77 Å. In the fifth B site, B is bonded in a 1-coordinate geometry to two equivalent Na, two equivalent Th, and five B atoms. There is one shorter (1.67 Å) and two longer (1.75 Å) B–B bond length. In the sixth B site, B is bonded in a 1-coordinate geometry to four Na and five B atoms. There is one shorter (1.65 Å) and two longer (1.77 Å) B–B bond length.