The Open Mineralogy Journal

2008, 2 : 60-65
Published online 2008 December 19. DOI: 10.2174/18744567000802010060
Publisher ID: TOMJ-2-60

Anomalous Temperature Dependence of the Heat of Hydration of Natrolite

Jie Wang and Philip S. Neuhoff
Department of Geological Sciences, 241 Williamson Hall, P.O. Box 112120, Gainesville, FL 32611- 2120, USA

ABSTRACT

The temperature dependence of the heat of hydration of natrolite was studied by isothermal adsorption calorimetry from 412 to 472 K. The heat capacity of hydration implied by these results is about 5 times greater than the calorimetric heat capacity of reaction, suggesting atypical behavior across this solid solution.

Keywords:

Natrolite, hydration, differential scanning calorimetry, enthalpy.