Centre of Inversion on Sixfold Axis (6 / m)

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The symbol above shows a sixfold axis perpendicular to the plane of the screen, i.e parallel to Z, with a centre of inversion on the axis. This combination results when there is a mirror plane perpendicular to the sixfold axis, hence the written symbol "6 / m". A fractional value next to the symbol indicates the height of the inversion centre above the XY plane.

Although not shown, a sixfold inversion axis (-6) is also present with its inversion point at the same height as the centre of inversion.

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