Growth Mechanism and Stability Study on the Fe3S4 Nanocrystals Synthesized Under Thermal and Humid Conditions

摘要: Greigite (Fe3S4) is important magnetic mineral that can not only instruct reducing environment but also provide paleomagnetic signal for the paleoenvironment research. Generally Fe3S4 exists as an unstable intermediate, whose preparation condition rigorous. Previous studies have accumulated rich results, research on its stable conditions, formation mechanism, and evolution process remains to be verified. This study simulates growth carries out experimental systematically under thermal humid conditions. Pure synthesized conditions of 200 °C, t = 30 h, pH 4–5. The morphology nanoscale particles. stably at transforms FeS2 with increasing time. results broaden stability range in Fe–S binary phase diagram. has typomorphic significance geological provides a scientific basis nano-magnetic materials.