Needle-based micromechanics prediction for normalized homogenized Young’s modulus $E/Es$⁠, as function of porosity $φ$⁠, for a wide range of Young’s moduli and Poisson’s ratios of crystal solid phase, and approximated by a power function and a fourth-order polynomial function. Experimental data: hydroxyapatite [24–27], collected in Ref. [12]; gypsum [29–33], collected in Ref. [13]; piezoelectric ceramics [34]; alumina, zirconia [35,43]; silicon carbide [36,43]; and silicon nitride [37,43].