vertices | 24 edges | 36 faces | 18 (18 quadrilaterals)

1 (36 edges)

18

sqrt(3)/2≈0.866025

1/sqrt(2)≈0.707107

1/2 = 0.5

(assuming unit edge length)

three cubes

three octahedra

octahedral group

amphichiral | compound | equilateral