Abstract
A sample of defibrillated and well orientated chrysotile fiber was prepared for X-ray rotation photograph, by opening the bundle of fiber physicochemically with sodium oleate, and the effect of the defibrillation on the orientation of forsterite recrystallized from chrysotile was studied. The forsterite formed from the defibrillated fiber is unoriented, although the forsterite from the undefibrillated chrysotile shows strong orientation. For defibrillated chrysotile, the forsterite is formed slowly and appears mainly at the temperature between 800°C and 830°C, at which temperature a large exothermic peak exists at DTA for the defibrillated chrysotile.
These phenomena are interpreted as the result of highly disordered atomic arrangment, which was caused by the rapid dehydration of the defibrillated chrysotile, and may have correlation with the existence of 14Å phase formed after dehydration.
