Rotoinversion Axis in Crystallography - Practical Electron Microscopy and Database - - An Online Book - |
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Microanalysis | EM Book https://www.globalsino.com/EM/ | ||||||||
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The symmetry operation of roto-inversion () is composed of rotation by 360/n about the roto-inversion axis, followed by inversion through a point (roto-inversion center). Note that a mirror is equivalent to roto-inversion -2. Figure 1615 shows the overall effect of the two steps is four-fold roto-inversion (-4, S4) around the axis.
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