The superheating of an albite feldspar

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Abstract
A high-temperature x-ray diffraction study of the superheating tendency of minus 200 plus 325 mesh powdered cleavelandite albite was made. Low albite could be retained at least 80°C and high albite at least 40°C above their equilibrium melting points. After twenty hours at some 30°C above the melting point, low albite was still partially crystalline. Melting followed a first-order reaction relationship after the initial period of time above the melting temperature and no difference between the Arrhenius activation energy for melting of high and low cleavelandite albite was noted.

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