[<a href="http://cci.lbl.gov:443/cctbx/">Index of services</a>]
[<a href="http://cci.lbl.gov:443/cctbx/explore_symmetry.html">New input</a>]
<hr>
<pre>
Result of symbol lookup:
  Space group number: 163
  Schoenflies symbol: D3d^2
  Hermann-Mauguin symbol: P -3 1 c
  Hall symbol: -P 3 2c

Input space group symbol: P -3 1 c
Convention: Default

Number of lattice translations: 1
Space group is centric.
Number of representative symmetry operations: 6
Total number of symmetry operations: 12

Parallelepiped containing an asymmetric unit:
  0&lt;=x&lt;=2/3; 0&lt;=y&lt;=1/3; 1/4&lt;=z&lt;=3/4

List of symmetry operations:
</pre><table border=2 cellpadding=2>
<tr>
<th>Matrix
<th>Rotation-part type
<th>Axis direction
<th>Screw/glide component
<th>Origin shift
</tr>
<tr>
<td><tt>x,y,z</tt>
<td>1<td>-<td>-<td>-
</tr>
<tr>
<td><tt>-y,x-y,z</tt>
<td>3^1<td>[0,0,1]<td>0,0,0<td>0,0,0
</tr>
<tr>
<td><tt>-x+y,-x,z</tt>
<td>3^-1<td>[0,0,1]<td>0,0,0<td>0,0,0
</tr>
<tr>
<td><tt>-y,-x,-z+1/2</tt>
<td>2<td>[-1,1,0]<td>0,0,0<td>0,0,1/4
</tr>
<tr>
<td><tt>x,x-y,-z+1/2</tt>
<td>2<td>[2,1,0]<td>0,0,0<td>0,0,1/4
</tr>
<tr>
<td><tt>-x+y,y,-z+1/2</tt>
<td>2<td>[1,2,0]<td>0,0,0<td>0,0,1/4
</tr>
<tr>
<td><tt>-x,-y,-z</tt>
<td>-1<td>-<td>-<td>0,0,0
</tr>
<tr>
<td><tt>y,-x+y,-z</tt>
<td>-3^1<td>[0,0,1]<td>0,0,0<td>0,0,0
</tr>
<tr>
<td><tt>x-y,x,-z</tt>
<td>-3^-1<td>[0,0,1]<td>0,0,0<td>0,0,0
</tr>
<tr>
<td><tt>y,x,z-1/2</tt>
<td>-2<td>[-1,1,0]<td>0,0,-1/2<td>0,0,0
</tr>
<tr>
<td><tt>-x,-x+y,z-1/2</tt>
<td>-2<td>[2,1,0]<td>0,0,-1/2<td>0,0,0
</tr>
<tr>
<td><tt>x-y,-y,z-1/2</tt>
<td>-2<td>[1,2,0]<td>0,0,-1/2<td>0,0,0
</tr>
</table><pre>

List of Wyckoff positions:
</pre><table border=2 cellpadding=2>
<tr>
<th>Wyckoff letter
<th>Multiplicity
<th>Site symmetry<br>point group type
<th>Representative special position operator
</tr>
<tr>
<td>i<td>12<td>1<td><tt>x,y,z</tt>
</tr>
<tr>
<td>h<td>6<td>2<td><tt>x,-x,1/4</tt>
</tr>
<tr>
<td>g<td>6<td>-1<td><tt>1/2,0,0</tt>
</tr>
<tr>
<td>f<td>4<td>3<td><tt>1/3,-1/3,z</tt>
</tr>
<tr>
<td>e<td>4<td>3<td><tt>0,0,z</tt>
</tr>
<tr>
<td>d<td>2<td>32<td><tt>-1/3,1/3,1/4</tt>
</tr>
<tr>
<td>c<td>2<td>32<td><tt>1/3,-1/3,1/4</tt>
</tr>
<tr>
<td>b<td>2<td>-3<td><tt>0,0,0</tt>
</tr>
<tr>
<td>a<td>2<td>32<td><tt>0,0,1/4</tt>
</tr>
</table><pre>

Harker planes:
</pre><table border=2 cellpadding=2>
<tr>
<th>Algebraic
<th>Normal vector
<th>A point in the plane
</tr>
<tr>
<td><tt>x-y,-x-2*y,0</tt><td>[0,0,1]<td>0,0,0
</tr>
<tr>
<td><tt>x+y,x+y,2*z+1/2</tt><td>[-1,1,0]<td>0,0,1/2
</tr>
<tr>
<td><tt>0,x-2*y,2*z+1/2</tt><td>[2,1,0]<td>0,0,1/2
</tr>
<tr>
<td><tt>2*x+y,0,2*z+1/2</tt><td>[1,2,0]<td>0,0,1/2
</tr>
</table><pre>

Additional generators of Euclidean normalizer:
  Number of structure-seminvariant vectors and moduli: 1
    Vector    Modulus
    (0, 0, 1) 2
  Further generators:
</pre><table border=2 cellpadding=2>
<tr>
<th>Matrix
<th>Rotation-part type
<th>Axis direction
<th>Screw/glide component
<th>Origin shift
</tr>
<tr>
<td><tt>-x,-y,z</tt>
<td>2<td>[0,0,1]<td>0,0,0<td>0,0,0
</tr>
</table><pre>

Grid factors implied by symmetries:
  Space group: (1, 1, 2)
  Structure-seminvariant vectors and moduli: (1, 1, 2)
  Euclidean normalizer: (1, 1, 2)

  All points of a grid over the unit cell are mapped
  exactly onto other grid points only if the factors
  shown above are factors of the grid.

</pre>
<hr>
[<a href="http://cci.lbl.gov:443/cctbx/">Index of services</a>]
[<a href="http://cci.lbl.gov:443/cctbx/explore_symmetry.html">New input</a>]