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http://www.answers.com/topic/isomer

i¡¤so¡¤mer   (¨©'sə-mər)
Chemistry. Any of two or more substances that are composed of the same elements in the same proportions but differ in properties because of differences in the arrangement of atoms.
Physics. Any of two or more nuclei with the same mass number and atomic number that have different radioactive properties and can exist in any of several energy states for a measurable period of time.
Õâ¸öÌ«³£¼ûÁË, ¶øÇÒÔç¾Íѧ¹ýÁË.


isostructural
crystallography) Pertaining to crystalline materials that have corresponding atomic positions, and have a considerable tendency for ionic substitution.
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Al¡¤low¡¤er
n.
1. An approver or abettor. [Obs.]


2. One who allows or permits.

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http://www.answers.com/allomerism

allomerism
n.
Consistency in crystalline form with variation in chemical composition.

allomerous al¡¤lom'er¡¤ous adj.

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Allomerism
(redirected from Allomer)    Also found in: Medical

Allomerism is the similarity in the crystalline structure of substances of different chemical composition.
References Penguin Science Dictionary 1994, Penguin Books
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