First we show the Mg atoms, which form an fcc aray, plus 4 more atoms inside the cube. Those 4 are circled in blue. Next we add the Aluminum atoms, connecting their tetrahedra. You'll notice that the ...
The first way to think of the spinel structure is the array of Al atoms. They sit on the corners of tetrahedra which share corners infinitely in 3 dimmensions, an array known as a Kagome net. The ...
He demonstrated that DNA strands could be designed to self-assemble into complex shapes, such as cubes, tetrahedra, and other polyhedral. This approach, known as structural DNA nanotechnology, has ...