La5S8Tl
Poltmann, F.E.Hahn, H.
Naturwissenschaften (1971) 58, 54-54
a=8.8Å b=8.8Å c=8.8Å
α=90° β=90° γ=90°
La5Se8Tl
a=9.148Å b=9.148Å c=9.148Å
La5Te8Tl
a=9.697Å b=9.697Å c=9.697Å