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A capital P opening a space group symbol.
Also known as: Primitive centring, Uncentred lattice symbol
The lattice centring letter P, marking a primitive lattice with one lattice point per unit cell.
Marks a primitive lattice, one having a single lattice point per unit cell.
Contexts: Laboratory
Opens the centring family, whose five other letters each add lattice points at defined positions within the cell.
Contexts: Laboratory
A single capital letter standing at the head of a space group symbol, before any figure.