Abstract
An X-ray powder diffractometric procedure has been applied to the determination of clinoptilolite which shows a serious preferred orientation on the (020) plane. Naturally occurring clinoptilolite and heulandite were employed for calibrating standards, because heulandite has the identical aluminosilicate framework with clinoptilolite. The matrix of the calibration mixtures was a pulverized zeolite tuff which was calcined at 1000°C in order to decompose any clinoptilolite and heulandite included. The diffraction intensity from clinoptilolite was calculated by the sum of the seven intensities of the (020), (200), (201), (220), (311), (310) and (401) lines, in order to reduce the interference by the preferred orientation. Linear calibration graphs were obtained throughout the concentration range of 0-100m/m% for two suits of calibration mixtures. The results were in good agreement with each other. The relative standard deviation for 64.6m/m% of clinoptilolite was 1.6%.
