lntensity differences of subsidiary reflections in calcic plagioclase

Content Provider	Semantic Scholar
Copyright Year	2007
Abstract	The intensity distribution of e reflections in intermediate plagioclase isdifferent from that of corresponding b reflections in anorthite. While e-reflection pairs with strong intensity asymmetry occur at positions corresponding to strong b reflections in anorthite, symmetrical ereflection pairs occur at positions typical of weak b reflections. The differences in intensity between s-pair sums and corresponding D reflections (e.g.071. 073,093.095) can be used to distinguish between the intermediate plagioclase and anorthite structural types, particularly in cases with highly diffuse reflections for which geometric riteria are ambiguous. Application of t-his method has documented very diffuse e reflections in volcanic labradorites and bytownites previously thought to only have b reflections. These plagioclases also have diffuse c reflections with the intensity distribution of c reflections in anorthite, and we designate them as transitional plagioclase to indicate presence of diffraction features characteristic of both structural tvDes.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.minsocam.org/ammin/AM63/AM63_124.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article