Electron microscopy
 
P321 (150) Space Group
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Table 1527. P321 (150) space group.

Name in the International Tables for Crystallography
P321 (the first symbol denotes the lattice type, and the second symbol denotes the three-fold symmetry that is selected to lie parallel to the z axis. The third and fourth symbols indicate that the two-fold rotation axes are parallel to the x and y axes.) P
164 32
Crystal system
Trigonal -3m
Asymm
0 ≤ x ≤ 2/3 and 0 ≤ y ≤ 2/3 and 0 ≤ z ≤ 1/2 and x ≤ (1+y)/2 and y ≤ min(1-x, (1+x)/2)
6 Absence of reflections

 

Translation
 
Symmetry (atomic coordinates)
X, Y, Z; -Y, X-Y, Z; Y-X, -X, Z; Y, X, -Z; X-Y, -Y, -Z; -X, Y-X, -Z
Remarks
The perpendicular symmetry elements go along unit cell translations b and c.
Crystal examples
 

 

 

 

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