1. At higher temperatures and pressures, andalusite may convert to sillimanite. 2. In addition, the peraluminous minerals andalusite , cordierite and muscovite. 3. The mineral gosseletite, a phase of manganian andalusite , is named after him. 4. Unusual minerals found in the volcanics include andalusite , muscovite, sillimanite and tourmaline. 5. Andalusite is trimorphic with kyanite and sillimanite, being the lower pressure mid temperature polymorph.6. South Africa possesses by far the largest portion of the world s known andalusite deposits. 7. It occurs commonly as an alteration product of corundum, andalusite and other aluminous minerals. 8. It's an important addition to the olivenite group, and isostructural with andalusite . 9. Kyanite is triclinic, while andalusite and sillimanite are both orthorhombic and belong to the dipyramidal point group. 10. Andalusite is an aluminium compound with high heat resistance used in furnaces, kilns and other industrial processes.
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