Tetrahemihexahedron

C0 = 0.7071067811865475244008443621048 = sqrt(2) / 2

V0 = (0.0, 0.0,  C0)
V1 = (0.0, 0.0, -C0)
V2 = ( C0, 0.0, 0.0)
V3 = (-C0, 0.0, 0.0)
V4 = (0.0,  C0, 0.0)
V5 = (0.0, -C0, 0.0)

Faces:
{ 0, 2, 1, 3 }
{ 0, 5, 1, 4 }
{ 2, 4, 3, 5 }
{ 0, 2, 4 }
{ 0, 3, 5 }
{ 1, 2, 5 }
{ 1, 3, 4 }
