Acronym	stodip
Name	octagram-octagram duoprism
Circumradius	sqrt[2-sqrt(2)] = 0.765367
Dihedral angles	at {4} between stop and stop:   90° at {8/3} between stop and stop:   45°
Face vector	64, 128, 80, 16
Confer	general duoprisms: n/d,m/b-dip   general polytopal classes: noble polytopes
External links

Incidence matrix according to Dynkin symbol

x8/3o x8/3o  

.   . .   . | 64 |  2  2 | 1  4 1 | 2 2
------------+----+-------+--------+----
x   . .   . |  2 | 64  * | 1  2 0 | 2 1
.   . x   . |  2 |  * 64 | 0  2 1 | 1 2
------------+----+-------+--------+----
x8/3o .   . |  8 |  8  0 | 8  * * | 2 0
x   . x   . |  4 |  2  2 | * 64 * | 1 1
.   . x8/3o |  8 |  0  8 | *  * 8 | 0 2
------------+----+-------+--------+----
x8/3o x   . ♦ 16 | 16  8 | 2  8 0 | 8 *
x   . x8/3o ♦ 16 |  8 16 | 0  8 2 | * 8

or
.   . .   .    | 64 |   4 |  2  4 |  4
---------------+----+-----+-------+---
x   . .   .  & |  2 | 128 |  1  2 |  3
---------------+----+-----+-------+---
x8/3o .   .  & |  8 |   8 | 16  * |  2
x   . x   .    |  4 |   4 |  * 64 |  2
---------------+----+-----+-------+---
x8/3o x   .  & ♦ 16 |  24 |  2  8 | 16

x4/3x x8/3o

.   . .   . | 64 |  1  1  2 | 1  2  2 1 | 2 1 1
------------+----+----------+-----------+------
x   . .   . |  2 | 32  *  * | 1  2  0 0 | 2 1 0
.   x .   . |  2 |  * 32  * | 1  0  2 0 | 2 0 1
.   . x   . |  2 |  *  * 64 | 0  1  1 1 | 1 1 1
------------+----+----------+-----------+------
x4/3x .   . |  8 |  4  4  0 | 8  *  * * | 2 0 0
x   . x   . |  4 |  2  0  2 | * 32  * * | 1 1 0
.   x x   . |  4 |  0  2  2 | *  * 32 * | 1 0 1
.   . x8/3o |  8 |  0  0  8 | *  *  * 8 | 0 1 1
------------+----+----------+-----------+------
x4/3x x   . ♦ 16 |  8  8  8 | 2  4  4 0 | 8 * *
x   . x8/3o ♦ 16 |  8  0 16 | 0  8  0 2 | * 4 *
.   x x8/3o ♦ 16 |  0  8 16 | 0  0  8 2 | * * 4

x4/3x x4/3x

.   . .   . | 64 |  1  1  1  1 | 1  1  1  1  1 1 | 1 1 1 1
------------+----+-------------+-----------------+--------
x   . .   . |  2 | 32  *  *  * | 1  1  1  0  0 0 | 1 1 1 0
.   x .   . |  2 |  * 32  *  * | 1  0  0  1  1 0 | 1 1 0 1
.   . x   . |  2 |  *  * 32  * | 0  1  0  1  0 1 | 1 0 1 1
.   . .   x |  2 |  *  *  * 32 | 0  0  1  0  1 1 | 0 1 1 1
------------+----+-------------+-----------------+--------
x4/3x .   . |  8 |  4  4  0  0 | 8  *  *  *  * * | 1 1 0 0
x   . x   . |  4 |  2  0  2  0 | * 16  *  *  * * | 1 0 1 0
x   . .   x |  4 |  2  0  0  2 | *  * 16  *  * * | 0 1 1 0
.   x x   . |  4 |  0  2  2  0 | *  *  * 16  * * | 1 0 0 1
.   x .   x |  4 |  0  2  0  2 | *  *  *  * 16 * | 0 1 0 1
.   . x4/3x |  8 |  0  0  4  4 | *  *  *  *  * 8 | 0 0 1 1
------------+----+-------------+-----------------+--------
x4/3x x   . ♦ 16 |  8  8  8  0 | 2  4  0  4  0 0 | 4 * * *
x4/3x .   x ♦ 16 |  8  8  0  8 | 2  0  4  0  4 0 | * 4 * *
x   . x4/3x ♦ 16 |  8  0  8  8 | 0  4  4  0  0 2 | * * 4 *
.   x x4/3x ♦ 16 |  0  8  8  8 | 0  0  0  4  4 2 | * * * 4