Electron microscopy
  
Cmcm (63) Space Group
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Table 1900. Cmcm (63) space group.

Name in the International Tables for Crystallography
 Cmcm
Lattice Type
 C
Patterson space group
 65
Point group
 mmm
Crystal system
 Orthorhombic
Laue class
 mmm
Asymm
 0 ≤ x ≤ 1/2 and 0 ≤ y ≤ 1/2 and 0 ≤ z ≤ 1/4
Number of symmetry operators
 16
Symmetry (atomic coordinates)
X, Y, Z; -X, -Y, 1/2+Z; -X, Y, 1/2-Z; X, -Y, -Z; -X, -Y, -Z; X, Y, 1/2-Z; X, -Y, 1/2+Z; -X, Y, Z; 1/2+X, 1/2+Y, Z; 1/2-X, 1/2-Y, 1/2+Z; 1/2-X, 1/2+Y, 1/2-Z; 1/2+X, 1/2-Y, -Z; 1/2-X, 1/2-Y, -Z; 1/2+X, 1/2+Y, 1/2-Z; 1/2+X, 1/2-Y, 1/2+Z; 1/2-X, 1/2+Y, Z
Crystal examples
 CrB: Cr1 at 0, 0.146, 1/4; Cr2 at 0, 0.854, 3/4; B1 at 0, 0.44, 1/4 and B2 at 0, 0.56, 3/4.
Ga2O3(ZnO)10: a = 3.32, b = 19.45, c = 36.55 Å, and α = β = γ = 90˚. [1]
FeO(OH), o-SrZrO3

 

 

 

 

[1] Emile D. Tchouankwe Kamga, Werner Mader, C.M. Kede, Luc Mbaze Meva’a and Armin Kirfel, International Journal of Engineering Research & Technology (IJERT), 2(8), 1394, 2013.

 
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