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 (a) Hydrothermal coarsening for 32 h at 225°C. (b) Vacuum coarsening for 2 h at 350°C. "W" indicates the location of wurtzite domains in the predominantly sphalerite particles. For further information on the data of Figs. 5a and 5b, see refs. 50 and 18, respectively.