Copyright information:Taken from "Special phase transformation and crystal growth pathways observed in nanoparticles†"Geochemical Transactions 2003;4():20-20.Published online 7 Nov 2003PMCID:PMC1475634.Copyright © 2003 The Royal Society of Chemistry and the Division of Geochemistry of the American Chemical Society The diagram is appropriate for the materials studied in this paper. At room temperature and pressure, for TiO, rutile is the bulk stable phase, anatase the metastable phase. For ZnS, sphalerite is the bulk stable phase and wurtzite the metastable phase. Solid lines: vacuum environment, dotted lines: aqueous environment. Below particle diameter in vacuum, a phase stability crossover occurs. In the presence of water, the phase stability crossover is shifted to diameter '