F3Ho
Piotrowski, M.Ptasiewicz-Bak, H.Murasik, A.
Physica Status Solidi, Sectio A: Applied Research (1979) 55, 163-166
a=6.404Å b=6.875Å c=4.379Å
α=90° β=90° γ=90°
F3Tb
Physica Status Solidi, Sectio A: Applied Research (1979) 55, K163-K166
a=6.513Å b=6.949Å c=4.384Å