MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Iron and sulfur reaction. Being heated in the test tube is a mixture of iron powder (upper circle) and flowers of sulfur (lower circle), which will fuse in to the compound iron sulfide. The test tube is plugged with mineral wool.
Model release not required. Property release not required.