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A capital A, B or C marking one centred face pair.
Also known as: Base centred lattice, One-face centring symbol
The lattice centring letters A, B and C, each marking a lattice with additional points at the centre of one opposite pair of faces.
Marks a lattice with additional points at the centre of one opposite pair of faces of the unit cell.
Contexts: Laboratory
Names the pair by the axis perpendicular to it, so the same lattice can be described by different letters depending on how the axes were chosen.
Contexts: Laboratory
A single capital letter at the head of a space group symbol, the choice of letter naming which pair of faces carries the extra points.