Laves tilings

In the 1987 book, Tilings and patterns, Branko Grünbaum calls the vertex-uniform tilings Archimedean, in parallel to the Archimedean solids. Their dual tilings are called Laves tilings in honor of crystallographer Fritz Laves.¹² They're also called Shubnikov–Laves tilings after Aleksei Shubnikov.³ John Conway called the uniform duals Catalan tilings, in parallel to the Catalan solid polyhedra.

The Laves tilings have vertices at the centers of the regular polygons, and edges connecting centers of regular polygons that share an edge. The tiles of the Laves tilings are called planigons. This includes the 3 regular tiles (triangle, square and hexagon) and 8 irregular ones.⁴ Each vertex has edges evenly spaced around it. Three dimensional analogues of the planigons are called stereohedrons.

These dual tilings are listed by their face configuration, the number of faces at each vertex of a face. For example V4.8.8 means isosceles triangle tiles with one corner with four triangles, and two corners containing eight triangles. The orientations of the vertex planigons (up to D12) are consistent with the vertex diagrams in the below sections.

Convex uniform tilings of the Euclidean plane

All reflectional forms can be made by Wythoff constructions, represented by Wythoff symbols, or Coxeter-Dynkin diagrams, each operating upon one of three Schwarz triangle (4,4,2), (6,3,2), or (3,3,3), with symmetry represented by Coxeter groups: [4,4], [6,3], or [3[3]]. Alternated forms such as the snub can also be represented by special markups within each system. Only one uniform tiling can't be constructed by a Wythoff process, but can be made by an elongation of the triangular tiling. An orthogonal mirror construction [∞,2,∞] also exists, seen as two sets of parallel mirrors making a rectangular fundamental domain. If the domain is square, this symmetry can be doubled by a diagonal mirror into the [4,4] family.

Families:

• (4,4,2), B C ~ 2 {\displaystyle {\tilde {BC}}_{2}} , [4,4] – Symmetry of the regular square tiling
  • I ~ 1 2 {\displaystyle {\tilde {I}}_{1}^{2}} , [∞,2,∞]
• (6,3,2), G ~ 2 {\displaystyle {\tilde {G}}_{2}} , [6,3] – Symmetry of the regular hexagonal tiling and triangular tiling.
  • (3,3,3), A ~ 2 {\displaystyle {\tilde {A}}_{2}} , [3[3]]

The [4,4] group family

The [6,3] group family

Non-Wythoffian uniform tiling

Uniform colorings

There are a total of 32 uniform colorings of the 11 uniform tilings:

1. Triangular tiling – 9 uniform colorings, 4 wythoffian, 5 nonwythoffian
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2. Square tiling – 9 colorings: 7 wythoffian, 2 nonwythoffian
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3. Hexagonal tiling – 3 colorings, all wythoffian
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4. Trihexagonal tiling – 2 colorings, both wythoffian
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5. Snub square tiling – 2 colorings, both alternated wythoffian
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6. Truncated square tiling – 2 colorings, both wythoffian
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7. Truncated hexagonal tiling – 1 coloring, wythoffian
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8. Rhombitrihexagonal tiling – 1 coloring, wythoffian
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9. Truncated trihexagonal tiling – 1 coloring, wythoffian
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10. Snub hexagonal tiling – 1 coloring, alternated wythoffian
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11. Elongated triangular tiling – 1 coloring, nonwythoffian
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See also

• Convex uniform honeycomb – The 28 uniform 3-dimensional tessellations, a parallel construction to the convex uniform Euclidean plane tilings.
• Euclidean tilings by convex regular polygons
• List of tessellations
• Percolation threshold
• Uniform tilings in hyperbolic plane

Further reading

• Conway, John H.; Burgiel, Heidi; Goodman-Strauss, Chaim (April 18, 2008). "Chapter 19, Archimedean tilings, table 19.1". The Symmetries of Things. A K Peters / CRC Press. ISBN 978-1-56881-220-5. Archived from the original on September 19, 2010.
• Coxeter, H.S.M.; Longuet-Higgins, M.S.; Miller, J.C.P. (1954). "Uniform polyhedra". Phil. Trans. 246 A: 401–450.
• Williams, Robert (1979). The Geometrical Foundation of Natural Structure: A Source Book of Design. Dover Publications, Inc. ISBN 0-486-23729-X. (Section 2–3 Circle packings, plane tessellations, and networks, pp. 34–40).
• Asaro, Laura; Hyde, John; Jensen, Melanie; Mann, Casey; Schroeder, Tyler. "Uniform edge-c-colorings of the Archimedean Tilings" (PDF). University of Washington. (Casey Mann at the University of Washington)
• Grünbaum, Branko; Shepard, Geoffrey (November 1977). "Tilings by Regular polygons" (PDF).
• Seymour, Dale; Britton, Jill (1989). Introduction to Tessellations. Dale Seymour Publications. pp. 50–57, 71-74. ISBN 978-0866514613.

External links

• Weisstein, Eric W. "Uniform tessellation". MathWorld.
• Uniform Tessellations on the Euclid plane
• Tessellations of the Plane
• David Bailey's World of Tessellations
• k-uniform tilings
• n-uniform tilings

References

1. Grünbaum, Branko; Shephard, G. C. (1987). Tilings and Patterns. W. H. Freeman and Company. pp. 59, 96. ISBN 0-7167-1193-1. 0-7167-1193-1 ↩

2. Conway, John H.; Burgiel, Heidi; Goodman-Strauss, Chaim (April 18, 2008). "Chapter 21, Naming the Archimedean and Catalan polyhedra and tilings, Euclidean Plane Tessellations". The Symmetries of Things. A K Peters / CRC Press. p. 288. ISBN 978-1-56881-220-5. Archived from the original on September 19, 2010. 978-1-56881-220-5 ↩

3. Encyclopaedia of Mathematics: Orbit - Rayleigh Equation, 1991 https://books.google.com/books?id=5rPnCAAAQBAJ&dq=Shubnikov%E2%80%93Laves+tilings&pg=PA169 ↩

4. Ivanov, A. B. (2001) [1994], "Planigon", Encyclopedia of Mathematics, EMS Press https://www.encyclopediaofmath.org/index.php?title=Planigon ↩