Figure 2
From: Cationic vacancies as defects in honeycomb lattices with modular symmetries
Unit (primitive) cell (\(dx/dy = N/2 = k = 1\)) of localized cations arranged in a honeycomb lattice with lattice constant, a showing the primitive vectors, dx and dy. Every primitive cell is a parallelogram engulfing two (un-)occupied cationic sites, spanning partial interiors of four cationic-site hexagons.
