Electron microscopy
 
I422 (97) Space Group
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Table 1868. I422 (97) space group.

Name in the International Tables for Crystallography
I422 I
139 422
Crystal system
Tetragonal 4/mmm
Asymm
0 ≤ x ≤ 1/2 and 0 ≤ y ≤ 1/2 and 0 ≤ z ≤ 1/4
16 Extinction conditions k + l = 2n for 0 k l reflections (same as I4/m and I-42m)
Symmetry (atomic coordinates)
X, Y, Z; -X, -Y, Z; -Y, X, Z; Y, -X, Z; -X, Y, -Z; X, -Y, -Z; Y, X, -Z; -Y, -X, -Z; 1/2+X, 1/2+Y, 1/2+Z; 1/2-X, 1/2-Y, 1/2+Z; 1/2-Y, 1/2+X, 1/2+Z; 1/2+Y, 1/2-X, 1/2+Z; 1/2-X, 1/2+Y, 1/2-Z; 1/2+X, 1/2-Y, 1/2-Z; 1/2+Y, 1/2+X, 1/2-Z; 1/2-Y, 1/2-X, 1/2-Z
Crystal examples
 

 

 

 

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