Sm
Smirnov, Yu.N.Prokhorov, I.A.
Soviet Physics - JETP (1975) 40, 504-506
a=3.644Å b=3.644Å c=5.876Å
α=90° β=90° γ=120°
Tb
Finkel', V.A.Smirnov, Yu.N.Vorob'ev, V.V.
Zhurnal Eksperimental'noi i Teoreticheskoi Fiziki (1967) 24, 21-24
a=3.6092Å b=3.6092Å c=5.6966Å