Great spinoprismatotesseractihexadecachoron

The great spinoprismatotesseractihexadecachoron, or gnappoth, is a nonconvex uniform polychoron that consists of 8 great rhombihexahedra, 16 tetrahedra, and 32 triangular prisms. Three great rhombihexahedra, one tetrahedron, and three triangular prisms join at each vertex.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the great tesseractitesseractihexadecachoron.