Continuous, martensitic nature of the transition ß→γ Li₃PO₄

Abstract

The transformationβ→γ Li₃PO₄ shows characteristics of both continuous and martensitic transformations. Below ∼340° C, no detectable transformation occurs; between 340 and 410° C, the transformation goes only partially to completion; above ∼410° C the transformation rapidly goes to completion. At any temperature in the range 340 to 410° C, transformation proceeds rapidly in the initial stages to attain a certain degree of transformation. With prolonged isothermal heating or grinding of the samples, further transformation does not occur. The reverse transformation could not be effected under normal, dry conditions.