An octahedron with edge duration √2 is usually placed with its Centre with the origin and its vertices on the coordinate axes; the Cartesian coordinates on the vertices are then The octahedron as a tetratetrahedron exists in the sequence of symmetries of quasiregular polyhedra and tilings with vertex configurations (three.n)two, https://arthuruddie.ja-blog.com/22383547/about-war-dice