Table 3. Density deviation 1 − ρ_h/ρ_t of tetragonal and hexagonal lattices for dimorphic RSi₂ and R ₂ TSi₃ compounds.

R	T	Deviation (%)
Ce	Au	1.08
U	Cu	0.32
Y	Si	0.84
Gd	Si	−1.72
Tb	Si	−1.04
Dy	Si	−1.58
Ho	Si	−1.70
Th	Si	−4.76
U	Si	−3.70
Pu	Si	−1.07