ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The cycloparaffins (CH2)36 and (CH2)60 were crystallized epitaxially from solutions on the (001) face of the NaCl crystal at various temperatures. Two types of crystals, so-called edge-on and flat-on crystals, were separately obtained depending on crystallization temperature. The temperature for obtaining edge-on crystals was higher by ca. 10°C than that for flat-on crystals. In both flat-on and edge-on crystals, the long side (b-axis) is aligned to the 〈110〉 direction of NaCl. The (001) plane in the flat-on crystal and (202) in the edge-on crystal are parallel to the substrate surface. The direction of the vector c′ defined as -a + c is parallel to the molecular axis in monoclinic cycloparaffin crystals. The angle β′ between c′ and the a-axis is almost constant at about 119°, while c′ changes linearly with the number of carbon atoms in a molecule. The space group changes from Aa to Ia in the new unit cell with the dimensions a, b, c′ and β′.
Additional Material:
9 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1989.021900417
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