The compound of a truncated tetrahedron and its dual, the triakis tetrahedron. The compound can be constructed from a truncated octahedron of unit edge length by midpoint augmentation with heights
(1)
 
(2)

The compound of a truncated tetrahedron and its dual, the triakis tetrahedron. The compound can be constructed from a truncated octahedron of unit edge length by midpoint augmentation with heights
(1)
 
(2)

Weisstein, Eric W. "Truncated TetrahedronTriakis Tetrahedron Compound." From MathWorldA Wolfram Web Resource. https://mathworld.wolfram.com/TruncatedTetrahedronTriakisTetrahedronCompound.html