The study noted that carbon nitride features a three-dimensional framework of CN4 tetrahedra. The precursors often include carbon-rich compounds and nitrogen-containing materials, in this case ...

Those 4 are circled in blue. Next we add the Aluminum atoms, connecting their tetrahedra. You'll notice that the 4 outer tetrahedra, and the 4 inner Mg atoms sit on spots mirroring eachother. Lastly ...

The beach obstacles to the D-Day landing in Normandy were formidable: gigantic concrete tetrahedra, hut-shaped wooden embankments, submerged log or concrete pilings and bristly steel “hedgehogs.” ...

They sit on the corners of tetrahedra which share corners infinitely in 3 dimmensions, an array known as a Kagome net. The image below shows only the Al atoms sitting on the corners of tetrahedra. Now ...

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 ...

Here, by combining simulations and STEM imaging, stacking fault tetrahedra are found to be the cause of a high swelling rate in fcc copper.