Lecture 6: 3D Lattices, 3D Symmetry, Space Groups
Lecture 6: 3D Lattices, 3D Symmetry, Space Groups
Lecture 6: 3D Lattices, 3D Symmetry, Space Groups
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Remember, the addition of translation led to the addition of a<br />
new symmetry element, the GLIDE PLANE (glide line in 2D),<br />
in <strong>3D</strong> there is another new symmetry element created by<br />
translations, the SCREW AXIS<br />
SCREW AXIS: combination of a rotation and a translation<br />
Screw axes are always right-handed<br />
or left-handed (come in<br />
enantiomorhpous pairs)