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Line 55: == A2 lattice and circle packings == {{distinguish\|Strukturbericht designation#A-compounds{{!}}the A2 crystal lattice structure in the Strukturbericht classification system}} [[File:Compound 3 triangular tilings.~~png~~svg\|thumb\|The A{{sup sub\|*\|2}} lattice as three triangular tilings: {{CDD\|node_1\|split1\|branch}} + {{CDD\|node\|split1\|branch_10lu}} + {{CDD\|node\|split1\|branch_01ld}}]] The [[vertex arrangement]] of the triangular tiling is called an [[Root system#Explicit construction of the irreducible root systems\|A<sub>2</sub> lattice]].<ref>{{Cite web\|url=http://www.math.rwth-aachen.de/~Gabriele.Nebe/LATTICES/A2.html\|title = The Lattice A2}}</ref> It is the 2-dimensional case of a [[simplectic honeycomb]].

Triangular tiling: Difference between revisions