Acronym addasi Name altered disnub icosahedron,compound of 20 oct (but not dasi) ` © ©` Circumradius 1/sqrt(2) = 0.707107 Inradius 1/sqrt(6) = 0.408248 Vertex figure [34] Confer compounds: se   si   gissi   dasi Externallinks

This compound has rotational freedom. It can be obtained at φ = 0° by 2 coincident si, rotating either of the (then) coincident oct, thought of as triagular antiprisms within an ike, in opposite directions around those axes. At φ = 60° this compound again comes to be 2 coincident gissi. Inbetween there are 2 further singular positions: One, where 4 (different oriented oct coincide each, resulting in a 4-fold cover of se. The other one, when vertices coincide by pairs, resulting in a static compound of 20 oct, called dasi.

Incidence matrix

```120 |   2   2 |   3  1 ||  1
----+---------+--------++---
2 | 120   * |   1  1 ||  1
2 |   * 120 |   2  0 ||  1
----+---------+--------++---
3 |   1   2 | 120  * ||  1
3 |   3   0 |   * 40 ||  1
----+---------+--------++---
♦ 6 |   6   6 |   6  2 || 20
```