Artificial glass sometimes crystallizes and contains spherulites that may be as large as a marble. As the glass has little similarity in chemical composition to volcanic obsidians, these spherulites when analyzed throw little light on the mineral nature of spherulites in rocks. They show, however, that in viscous semi … See more In petrology, spherulites are small, rounded bodies that commonly occur in vitreous igneous rocks. They are often visible in specimens of obsidian, pitchstone, and rhyolite as globules about the size of millet seed or rice grain, … See more Under the microscope the spherulites are of circular outline and are composed of thin divergent fibers that are crystalline as verified with polarized light. Between crossed See more Occasionally spherulites are found that are many centimeters and, even more rarely, up to two or three meters in diameter. Those spherulites, which are more than 20 centimeters in … See more Variolites are a type of radiate fibrous growth, resembling spherulites in many respects, consisting of minute feathery crystals spreading … See more Spherulites are most common in silica-rich glassy rocks. Sometimes they compose the whole mass; more usually they are surrounded by a glassy or felsitic base. When obsidians are devitrified, the spherulites are often traceable, though they may be more or … See more Very large and cavernous spherulites are called lithophysae; they are found in obsidians at Lipari, in Yellowstone Park and other places. The characteristic radiate fibrous structure is … See more WebNov 4, 2010 · Spherulitic crystals are found in association with many materials and diseases, but the fundamental formation mechanism is not well understood. Using maleic chitosan to control CaCO 3 crystallization, we have discovered a two-stage process that produces biomimetic CaCO 3 spherulites.
Spherulitic Crystallization in Polypropylene: Journal of …
WebSpherulite formation is an example of self-assembly, where building blocks spontaneously arrange themselves into larger, more complex structures. These structures determine the material's functionality in both foods and biological systems. Understanding of spherulite formation is limited. WebApr 19, 2024 · Take one of your drops with lots of crystals (spherulites) and vortex it vigorously to break the crystals (called a seed stock). This will produce micro-crystals … citruspers bbc
Spherulitic crystallization of 3-nitro-1,2,4-triazol-5-one in water+N
Webkeith, h.d., spherulitic crystallization from melt .i. fractionation + impurity segregation + their influence on crystalline morphology, journal of applied physics 35: 1270 (1964). Google Scholar KELLER, A, THE SPHERULITIC STRUCTURE OF CRYSTALLINE POLYMERS .2. WebThe present work was undertaken to establish rates of primary nucleation for isotactic polypropylene and to put forth a modified classical model for the secondary nucleation process in isotactic polypropylene systems. WebApr 19, 2024 · Various spherulites or spherulitic crystals are widely encountered in polymeric materials when crystallized from viscous melts or concentrated solutions. However, the microstructures and growth processes are quite complicated and remain unclear and, thus, the formation mechanisms are rather elusive. Here, diverse kinds of … citrus pear sweet pork