Fig. ). The value ⍴ = Q* meridian /Q* equatorial highlights that the nucleation of bassanite at T > 80 °C is associated with the formation of near-isotropic crystals/particles (⍴ approaches 1). Conversely, the growth of larger crystals of any phase results in ⍴ deviating from 1, where ⍴ < 1 implies that crystals' long axes are aligned horizontally. Interestingly, after the formation of small isotropic bassanite particles, upon cooling to T = 35 °C, this phase continues to grow, becoming more anisotropic. This is evidenced by the sharp drop in ⍴ after ~9600 s. Gypsum does not appear in diffraction until ~15900 s . This extended growth period of bassanite outside its stability window (Fig. ) offers the possibility to convert gypsum to phase-pure bassanite with specific sizes/morphologies. Our small-angle data analysis further supports this notion (SI: Materials and Methods).