The synthesized sample of POS is rigid, strong, and impervious to gas diffusion. Given that the amorphous density is 0.40 g/cm, which best describes the sample density? Lower than the amorphous density Much lower than the crystalline density and close to the amorphous density O Slightly lower than crystalline density O Equal to the crystalline density Slightly larger than the crystalline density Close to the mechanodiffusive limit derived from the Avasarala equation Much larger than the crystalline density Insufficient information