Table 6.

Longitudinal velocity, v_l (ms⁻¹), transverse velocity, v_t (ms⁻¹), average elastic wave velocity, v_m (ms⁻¹), Debye temperature, Θ_D (K), Gruneisen parameter, γ, melting temperature, T_m (K), heat capacity per unit volume, $\rho C_P$ (Jm⁻³K⁻¹), thermal expansion coefficient, α (K⁻¹), minimum thermal conductivity, κ_min (Wm⁻¹K⁻¹) and lattice thermal conductivity, κ_ph (Wm⁻¹K⁻¹) at 300 K of NaSbS₂ polymorphs.

NaSbS2 Polymorphs	vl	vt	vm	ΘD	γ	Tm	ρCP (x106)	α (x10−5)		κmin		κph
								α(E)	α(Tm)	Clark	Cahill
Monoclinic	3742	2294	2532	259	1.28	603	1.68	3.62	3.32	0.41	0.55	2.77
Trigonal	4665	2799	3096	324	1.36	731	1.79	2.24	2.74	0.53	0.70	5.64
Triclinic	3400	2071	2287	234	1.31	575	1.68	4.39	3.48	0.37	0.50	3.12