Fig. 6: Impact of evaporation rate on the nucleation and growth of sodium sulfate spherulites.
From: Controlled spherulitic crystal growth from salt mixtures

Typical crystallization stages of a 1 μL droplet with molar fraction xMg = 0.12 at a fast evaporation rates (RH ≤ 45%) and b slow evaporation rates (RH ≥ 60%). All scale bars are 50 μm.