Acronym	quittin
Name	quasitruncated penteract
Field of sections	©
Circumradius	sqrt[13-8 sqrt(2)]/2 = 0.649286
Inradius wrt. quitit	[sqrt(2)-1]/2 = 0.207107
Inradius wrt. pen	(5-4 sqrt(2))/sqrt(20) = -0.146877
Vertex figure	©
Coordinates	((sqrt(2)-1)/2, (sqrt(2)-1)/2, (sqrt(2)-1)/2, (sqrt(2)-1)/2, 1/2)   & all permutations, all changes of sign
Volume	(1230-869 sqrt(2))/30 = 0.034947
Face vector	160, 400, 400, 200, 42
Confer	analogs: quasitruncated hypercube qtCn
External links

As abstract polytope quittin is isomorphic to tan, thereby replacing octagrams by octagons, resp. quith by tic, resp. quitit by tat.

Note that the tets and pens become retrograde here.

Incidence matrix according to Dynkin symbol

o3o3o3x4/3x

. . . .   . | 160 |   4  1 |   6  4 |   4  6 |  1  4
------------+-----+--------+--------+--------+------
. . . x   . |   2 | 320  * |   3  1 |   3  3 |  1  3
. . . .   x |   2 |   * 80 ♦   0  4 |   0  6 |  0  4
------------+-----+--------+--------+--------+------
. . o3x   . |   3 |   3  0 | 320  * |   2  1 |  1  2
. . . x4/3x |   8 |   4  4 |   * 80 |   0  3 |  0  3
------------+-----+--------+--------+--------+------
. o3o3x   . ♦   4 |   6  0 |   4  0 | 160  * |  1  1
. . o3x4/3x ♦  24 |  24 12 |   8  6 |   * 40 |  0  2
------------+-----+--------+--------+--------+------
o3o3o3x   . ♦   5 |  10  0 |  10  0 |   5  0 | 32  *
. o3o3x4/3x ♦  64 |  96 32 |  64 24 |  16  8 |  * 10