Phase Separation of a Metastable Three-Component n-Paraffin Solid Solution

Autor:	Douglas L. Dorset, Robert G. Snyder
Rok vydání:	1999
Předmět:	Materials science Spinodal decomposition Superlattice Crystal structure Surfaces Coatings and Films Crystallography symbols.namesake Fourier transform Electron diffraction Metastability Materials Chemistry symbols Lamellar structure Physical and Theoretical Chemistry Solid solution
Zdroj:	The Journal of Physical Chemistry B. 103:3282-3286
ISSN:	1520-5207 1520-6106
DOI:	10.1021/jp9847639
Popis:	An equimolar combination of n-C28H58/n-C32H66/n-C36H74, crystallized from the melt, initially forms a solid solution. Electron diffraction data from the epitaxially oriented [100] projection can be used to determine its crystal structure, a pseudo n-C33H68 layer in space group A21am (a = 7.42, b = 4.96, c = 87.40 A). After 6 days at room temperature, a superlattice is formed (c = 351.1 A). Its crystal structure, suggested from the direct Fourier transform of 00𝓁 reflections, is a sequence of solid solution lamellar layers. After 16 months, another superlattice is observed with a spacing double the one found earlier. Its crystal structure appears to be a sequence of nearly pure n-alkane chain layers. While the behavior resembles the case of n-C30H62/ n-C36H74 solids, where n-C28H58/n-C32H66 1:1 is a pseudocomponent, the sequence of phase separation within the miscibility gap is more complicated than that of the binary combination.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::adf5abe321387606972f2b1bae5d8730 https://doi.org/10.1021/jp9847639 Zobrazit plný text záznamu