Thermal transformation of manganophyllite

Abstract

Thermal transformation of manganophyllite in air has been studied in the temperature range up to 1200°C, using the differential thermal, thermogravimetric, and X-ray analyses. A correlation of the thermal data with the phase determinations shows that manganophyllite pursues the reaction process shown in the following schema with increasing temperature, and transforms into two phases, i. e. olivine and leucite, at high temperature.
partial dehydration main dehydration
Manganophyllite olivine leucite
braunite
increasing temperature