Ni

Axis: N
End: introverted (negative).
Sign in notation: −
Lattice angle: 202.5°.

Stacks that use Ni in ego order

Stack	Ego position
Se-Fi-Te-Ni	4
Se-Ti-Fe-Ni	4
Fe-Ni-Se-Ti	2
Te-Ni-Se-Fi	2
Ni-Fe-Ti-Se	1
Ni-Te-Fi-Se	1
Fi-Se-Ni-Te	3
Ti-Se-Ni-Fe	3