Biscribed Non-Chiral Solids

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Biscribed Tetrakis Hexahedron
biscribed form
Vertices:  14  (6[4] + 8[6])
Faces:24  (isosceles triangles)
Edges:36  (24 short + 12 long)
Symmetry:  Full Octahedral  (Oh)
Short Edge Angle:  acos(−(5+2*sqrt(3))/13)    ≈130.623436603 degrees
Long Edge Angle:  acos(−2*(1+3*sqrt(3))/13)    ≈162.412046226 degrees
Dual Solid:  Biscribed Truncated Octahedron
(values below based on circumscribed radius = 1)
Short Edge (24):  sqrt(6*(3−sqrt(3)))/3    ≈0.91940168676196612196
Long Edge (12):  2*sqrt(3)/3    ≈1.1547005383792515290
Circumscribed Radius:  1
Inscribed Radius:  1/sqrt(5−2*sqrt(3))    ≈0.80689822135507345663
Volume:8/3    ≈2.6666666666666666667