Thermodynamic and Nucleation Kinetic Dataset of Strontium Nitrate (Sr(NO3)2) Aqueous Crystallization Based on Classical Nucleation Theory

This dataset provides systematic experimental measurements, model fitting results and corresponding visualization figures for the crystallization behavior of strontium nitrate in pure water, covering both thermodynamic and nucleation kinetic dimensions.The solubility data were determined by the gravimetric equilibrium method across a wide temperature range (278.15–363.15 K), covering the low-temperature β-phase (Sr(NO3)2·4H2O) and high-temperature α-phase (anhydrous Sr(NO3)2) separated by the peritectic transition point at ~301.54 K. The metastable zone width (MSZW) data were collected via in-situ turbidity monitoring under controlled variables: saturation temperature (293.15–333.15 K), cooling rate (5–25 K/h), and stirring rate (100–500 rpm).Three classical nucleation theory frameworks (Nyvlt equation, self-consistent nucleation equation, 3D nucleation model) were applied to fit the MSZW data, yielding key kinetic parameters including apparent nucleation order, nucleation rate constant, and solid-liquid interfacial energy parameter.

A thermodynamic-kinetic coupling model was further established to quantitatively correlate the solubility temperature coefficient with MSZW for both phase regions.All figures and tables presented in this dataset are directly extracted from the original research paper, with complete raw data, error bars and fitting curves retained. This dataset fills the long-standing data gap of Sr(NO3)2 nucleation kinetics across the peritectic transition region, and provides fundamental data support for the design, optimization and scale-up of industrial cooling crystallization processes for strontium nitrate.