Actions

Difference between revisions of "Partial structure"

From Online Dictionary of Crystallography

Line 1: Line 1:
 
<font color="blue">Structure partielle</font> (''Fr'').
 
<font color="blue">Structure partielle</font> (''Fr'').
  
The crystal structure formed by a selection of atoms contained in the unit cell.
+
The crystal structure formed by a partial 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.
 
In describing a crystal structure it is sometimes convenient to characterise only the structure formed by the selected atoms.

Revision as of 12:33, 29 May 2020

Structure partielle (Fr).

The crystal structure formed by a partial 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