Materials Data on Tc7B3 by Materials Project
Tc7B3 crystallizes in the hexagonal P6_3mc space group. The structure is three-dimensional. there are three inequivalent Tc+1.29- sites. In the first Tc+1.29- site, Tc+1.29- is bonded in a distorted L-shaped geometry to two equivalent B3+ atoms. Both Tc–B bond lengths are 2.25 Å. In the second Tc+1.29- site, Tc+1.29- is bonded in a 3-coordinate geometry to three equivalent B3+ atoms. All Tc–B bond lengths are 2.22 Å. In the third Tc+1.29- site, Tc+1.29- is bonded in a 3-coordinate geometry to three equivalent B3+ atoms. There are one shorter (2.19 Å) and two longer (2.21 Å) Tc–B bond lengths. B3+ is bonded in a 6-coordinate geometry to six Tc+1.29- atoms.
36 MATERIALS SCIENCE↗