Acronym	stardip
Name	pentagram-pentagram duoprism
	©
Circumradius	sqrt[1-1/sqrt(5)] = 0.743496
Dihedral angles	at {4} between stip and stip:   90° at {5/2} between stip and stip:   36°
Face vector	25, 50, 35, 10
Confer	general duoprisms: n/d,m/b-dip   general polytopal classes: noble polytopes
External links

Incidence matrix according to Dynkin symbol

x5/2o x5/2o

.   . .   . | 25 |  2  2 | 1  4 1 | 2 2
------------+----+-------+--------+----
x   . .   . |  2 | 25  * | 1  2 0 | 2 1
.   . x   . |  2 |  * 25 | 0  2 1 | 1 2
------------+----+-------+--------+----
x5/2o .   . |  5 |  5  0 | 5  * * | 2 0
x   . x   . |  4 |  2  2 | * 25 * | 1 1
.   . x5/2o |  5 |  0  5 | *  * 5 | 0 2
------------+----+-------+--------+----
x5/2o x   . ♦ 10 | 10  5 | 2  5 0 | 5 *
x   . x5/2o ♦ 10 |  5 10 | 0  5 2 | * 5

or
.   . .   .    | 25 |  4 |  2  4 |  4
---------------+----+----+-------+---
x   . .   .  & |  2 | 50 |  1  2 |  3
---------------+----+----+-------+---
x5/2o .   .  & |  5 |  5 | 10  * |  2
x   . x   .    |  4 |  4 |  * 25 |  2
---------------+----+----+-------+---
x5/2o x   .  & ♦ 10 | 15 |  2  5 | 10

x5/2o x5/3o

.   . .   . | 25 |  2  2 | 1  4 1 | 2 2
------------+----+-------+--------+----
x   . .   . |  2 | 25  * | 1  2 0 | 2 1
.   . x   . |  2 |  * 25 | 0  2 1 | 1 2
------------+----+-------+--------+----
x5/2o .   . |  5 |  5  0 | 5  * * | 2 0
x   . x   . |  4 |  2  2 | * 25 * | 1 1
.   . x5/3o |  5 |  0  5 | *  * 5 | 0 2
------------+----+-------+--------+----
x5/2o x   . ♦ 10 | 10  5 | 2  5 0 | 5 *
x   . x5/3o ♦ 10 |  5 10 | 0  5 2 | * 5

x5/3o x5/3o

.   . .   . | 25 |  2  2 | 1  4 1 | 2 2
------------+----+-------+--------+----
x   . .   . |  2 | 25  * | 1  2 0 | 2 1
.   . x   . |  2 |  * 25 | 0  2 1 | 1 2
------------+----+-------+--------+----
x5/3o .   . |  5 |  5  0 | 5  * * | 2 0
x   . x   . |  4 |  2  2 | * 25 * | 1 1
.   . x5/3o |  5 |  0  5 | *  * 5 | 0 2
------------+----+-------+--------+----
x5/3o x   . ♦ 10 | 10  5 | 2  5 0 | 5 *
x   . x5/3o ♦ 10 |  5 10 | 0  5 2 | * 5

or
.   . .   .    | 25 |  4 |  2  4 |  4
---------------+----+----+-------+---
x   . .   .  & |  2 | 50 |  1  2 |  3
---------------+----+----+-------+---
x5/3o .   .  & |  5 |  5 | 10  * |  2
x   . x   .    |  4 |  4 |  * 25 |  2
---------------+----+----+-------+---
x5/3o x   .  & ♦ 10 | 15 |  2  5 | 10