Abstract
Analysis of X-ray diffraction powder data for five palygorskite samples shows that three of the samples are orthorhombic and two are monoclinic. Retaining the same cell setting for all palygorskites, in one of the monoclinic samples the unique axis is b, and in the other, is a. Unit-cell parameters are in agreement with the values given in the literature. For both the monoclinic and the orthorhombic minerals systematic extinctions in hkl reflections lead to a primitive cell with an »-glide on (001), consistent with the projected structure of Bradley (1940). Data in the literature are in general agreement with the symmetry results of the present study.
This content is PDF only. Please click on the PDF icon to access.
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
