SQUARE IN A SQUARE QUILT BLOCK The square in a square is a great building block to use in other quilt blocks. For an example of this, see the Indiana Puzzle block.

Combining these designed hexagonal building blocks with planar square building blocks, a series of (3, 3, 4)-linked 3D COFs with zyg topology were synthesized.

Combining these designed hexagonal building blocks with planar square building blocks, a series of (3, 3, 4)-linked 3D COFs with zyg topology were synthesized. view more Credit: ©Science China Press ...