Iron-nickel ordered grains produced by the reaction of metallic film and ultrafine metallic grains.

Iron Sulfide Grains Produced by Coalescence of Fe and S Smoke Grains.

“…. KAITO and Y. SAITO 1990). Therefore, the use of the ultrafine grain and the coalescence phenomenon may present one new approach to the formation of geophysically and astrophysically interesting materials.…”