We discuss an experimental protocol to measure the degree of preferred orientation by using a textural index (T) consisting of a single parameter easily derived from X-ray diffraction data recovered with a powder diffractometer. This textural index can be used for a quantitative characterization of the development of crystallographic orientation in biominerals and biomimetic materials which in ...

Introduction: The detailed interpretations of chondrule thermal histories are difficult and controversial. The olivine in Type IA chondrules may be relicts of granular olivine aggregates or formed by fractional crystallization [1,2]. Type IIA chondrules may have been heated and cooled once or multiple times [3,4]. Criteria in addition to texture would be useful for determining the extent of mel...

dehsalm metamorphic complex located in east of iran consists of regionally metamorphosed rocks intruded by three phases of granitic masses. synkinematic porphyroblasts of garnet from staurolite-garnet schist present well preserved growth zoning. electron microprobe analysis of selected garnets was carried out to interpret the origin and pattern of zoning in amphibolite facies garnets and its im...

Thin section polarized-light microscopy is a simple, cost-effective and nondestructive technique utilized to delineate crystalline or amorphous solids at varying scales and spatial resolutions; thereby allowing the different phases to be studied within their textural framework. Estimates of chemical composition and insight into the solid’s genesis can be deduced via unique textural characterist...