Aluminium diboride (AlB2)

The size of models (diameters):
Atoms (both Al and B) - 13.35 mm;
Holes - 2 mm.

The example of the constructed model: https://skfb.ly/p9OTP
There are:
6 Al-Al bonds - 70 mm
24 Al-Al bonds - 64 mm
12 Al-B bonds - 51 mm
6 B-B bonds - 37 mm