Bilbao Crystallographic Server XML output Wyckoff positions

Wyckoff Positions

To obtain the information about the Wyckoff positions of a group in XML form you have to give the command
GET /cgi-bin/cryst/xml/nph-get_doc?p=wpos&g=group"
where

• group -- is the group number in ITA, followed by a letter that specifies the setting that is used in case that there are two conventional settings.
  The letters are: b|c for the unique axis, o|t where o corresponds to origin choice one and t -- to origin choice two, and [rh]=h|r for rhombohedral and hexagonal axes.

For example if you want to obtain the Wyckoff positions of the group 012( C 2/m) [unique axis c] you have to send the following request to the server:

GET /cgi-bin/cryst/xml/nph-get_doc?p=wpos&g=12c

The output you will obtain has the following form:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE bcs_group PUBLIC "bcs_group" "www.cryst.ehu.es/cryst/dtd/bcs_group.dtd">

<bcs_group><!-- Bilbao Crystallographic Server (www.cryst.ehu.es) -->
<group number="12" symbol=" C 2/m">
<wpos><!-- Wyckoff positions of the group 12 ( C 2/m) [unique axis b] -->
<sets>
<transl> 0, 0, 0</transl>
<transl> 1/2, 1/2, 0</transl>
</sets>
<position name="8j" ssym="1">
<xyz>x,y,z</xyz>
<xyz>-x,y,-z</xyz>
<xyz>-x,-y,-z</xyz>
<xyz>x,-y,z</xyz>
</position>
<position name="4e" ssym="-1">
<xyz>1/4,1/4,0</xyz>
<xyz>3/4,1/4,0</xyz>
</position>
<position name="4f" ssym="-1">
<xyz>1/4,1/4,1/2</xyz>
<xyz>3/4,1/4,1/2</xyz>
</position>
<position name="4g" ssym="2">
<xyz>0,y,0</xyz>
<xyz>0,-y,0</xyz>
</position>
<position name="4h" ssym="2">
<xyz>0,y,1/2</xyz>
<xyz>0,-y,1/2</xyz>
</position>
<position name="4i" ssym="m">
<xyz>x,0,z</xyz>
<xyz>-x,0,-z</xyz>
</position>
<position name="2a" ssym="2/m">
<xyz>0,0,0</xyz>
</position>
<position name="2c" ssym="2/m">
<xyz>0,0,1/2</xyz>
</position>
<position name="2b" ssym="2/m">
<xyz>0,1/2,0</xyz>
</position>
<position name="2d" ssym="2/m">
<xyz>0,1/2,1/2</xyz>
</position><!-- end of the list -->
</wpos>
</group>
</bcs_group>