HoS
Hulliger, F.Landolt, M.Schmelczer, R.
Rare Earths in Modern Science and Technology (1982) 3, 455-458
a=5.438Å b=5.438Å c=5.438Å
α=90° β=90° γ=90°
HoSe
Hulliger, F.Schmelczer, R.Landolt, M.
a=5.666Å b=5.666Å c=5.666Å