O20Tb11
Tuenge, R.T.Eyring, L.
Journal of Solid State Chemistry (1982) 41, 75-89
a=6.5Å b=9.9Å c=6.5Å
α=90° β=99.6° γ=96.3°
O9Pr5
Tuenge, R.T.Eyring, L.
Journal of Solid State Chemistry (1979) 29, 165-179
a=6.728Å b=19.319Å c=15.48Å
α=90° β=125.46° γ=90°