Quasidisprismatogrand hexacosihecatonicosachoron

The quasidisprismatogrand hexacosihecatonicosachoron, or quad pagaxhi, is a nonconvex fissary uniform polychoron that consists of 600 regular tetrahedra, 120 great stellated dodecahedra, 1200 triangular prisms, and 720 pentagrammic prisms. 4 tetrahedra, 4 great stellated dodecahedra, 12 triangular prisms, and 12 pentagrammic prisms join at each vertex. It is the result of expanding the cells of either a great grand stellated hecatonicosachoron or a grand hexacosichoron outwards.

It is fissary as vertices coincide by four, producing a compound vertex figure; in addition, edges coincide by two.

It is in the same regiment as the grand ditetrahedronary hexacosidishecatonicosachoron.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the grand ditetrahedronary hexacosidishecatonicosachoron.