Johnson Solids (Page 4)

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(J66) Augmented Truncated Cube
Vertices:  28  ({8 + 4 * 2}[3] + {8 + 4}[4])
Faces:22  ({4 * 3} equilateral triangles + {4 + 1} squares
    + {4 + 1} regular octagons)
Edges:48
Symmetry:  4-fold Pyramidal  (C4v)
(values below based on edge length = 1)
Volume:(24+16*sqrt(2))/3    ≈15.542472332656506927