Difference between revisions of "Partial structure"
From Online Dictionary of Crystallography
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In describing a crystal structure it is sometimes convenient to characterise only the structure formed by the selected atoms. | In describing a crystal structure it is sometimes convenient to characterise only the structure formed by the selected atoms. | ||
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| + | '''Example''' | ||
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| + | The structure of <math>BaTiO_3</math> is tetragonal with a primitive unit cell and lattice constants <math>a</math> and <math>c</math>. The partial structure of Ba has the same lattice constants whereas the partial structure of O has also a primitive cell but with the lattice constant <math>a_O = a/ \sqrt{2}</math>, <math>c</math> being equal | ||
See synonymous [[Substructure]] | See synonymous [[Substructure]] | ||
Revision as of 12:31, 29 May 2020
Structure partielle (Fr).
The crystal structure formed by a selection of atoms contained in the unit cell.
In describing a crystal structure it is sometimes convenient to characterise only the structure formed by the selected atoms.
Example
The structure of [math]BaTiO_3[/math] is tetragonal with a primitive unit cell and lattice constants [math]a[/math] and [math]c[/math]. The partial structure of Ba has the same lattice constants whereas the partial structure of O has also a primitive cell but with the lattice constant [math]a_O = a/ \sqrt{2}[/math], [math]c[/math] being equal
See synonymous Substructure