Materials Data on Np2Tc3Ge4 by Materials Project
Np2Tc3Ge4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Np is bonded in a 10-coordinate geometry to two equivalent Tc and eight Ge atoms. There are one shorter (2.89 Å) and one longer (2.98 Å) Np–Tc bond lengths. There are a spread of Np–Ge bond distances ranging from 2.94–3.10 Å. There are two inequivalent Tc sites. In the first Tc site, Tc is bonded in a 7-coordinate geometry to two equivalent Np and five Ge atoms. There are a spread of Tc–Ge bond distances ranging from 2.49–2.60 Å. In the second Tc site, Tc is bonded to six Ge atoms to form distorted corner-sharing TcGe6 octahedra. The corner-sharing octahedral tilt angles are 22°. All Tc–Ge bond lengths are 2.55 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 8-coordinate geometry to four equivalent Np and four Tc atoms. In the second Ge site, Ge is bonded in a 10-coordinate geometry to four equivalent Np, four Tc, and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.86 Å.