Fi

Axis: F
End: introverted (negative).
Sign in notation: −
Lattice angle: 337.5°.

Stacks that use Fi in ego order

Stack	Ego position
Ne-Fi-Te-Si	2
Se-Fi-Te-Ni	2
Te-Ni-Se-Fi	4
Te-Si-Ne-Fi	4
Ni-Te-Fi-Se	3
Si-Te-Fi-Ne	3
Fi-Ne-Si-Te	1
Fi-Se-Ni-Te	1