Johnson Solids (Page 5)

(box: x-ray)  (F: faces)  (slider: perspective)  (image: L=rotate R=zoom)  (M: metrics)
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(J84) Snub Disphenoid
Vertices:  8  (4[4] + 4[5])
Faces:12  ({8 + 4} equilateral triangles)
Edges:18
Symmetry:  2-fold Antiprismatic  (D2v)
(values below based on edge length = 1)
Volume:sqrt(root[5832*(x^3)−1377*(x^2)    
    −2160*x−4])    
≈0.85949364619130053156