20) cubohemioctahedron 4/3 4|3 [51,78] dual: hexahemioctacron (6.4/3.6.4), octahedral group S4, χ=-2, one-sided V=12, E=24, F=10=4{6}+3{4}+3{4/3} α γ a b c ρ/R r/ρ l/ρ h/r {6} 30.0 90.0000 30.00 90.00 90.00 0.866025 0.000000 0.577350 ∞ {4} 45.0 54.7356 30.00 45.00 35.26 0.866025 0.816497 0.577350 0.707107 {4/3} 135.0 -54.7356 30.00 45.00 35.26 0.866025 0.816497 0.577350 0.707107