Stable cubic spinels in the Zn-Mn-O system in air

摘要

A part of the Zn-Mn-O phase diagram has been studied by using soft synthetic conditions and highly reactive precursors. This procedure allowed us to find and to isolate new single phases in the Zn-rich region. The new compounds are cubic spinels with a nominal composition Mn3-xZnxO4 with x = 1.6 and 1.7. These spinels decompose upon heating giving rise to tetragonal distorted spinels. This survey is focused on the low-temperature region (T <= 700 degrees C) completing previous reports on the Zn-Mn-O phase diagram.