WebThis packing sequence would be designated ABCABC, and is also known as face-centered cubic (FCC). Both arrangements give the closest possible packing of spheres leaving only about a fourth of the available space empty. The smallest repeating array of atoms in a crystal is called a unit cell. WebApr 3, 2024 · Three-Dimensional close packing from two-Dimensional Hexagonal close-packed layers: With the assistance of two-Dimensional Hexagonal packed layers, Three-Dimensional close packing can be shaped in two ways: Stacking over the first layer on the second layer Stacking over the second layer on the third layer
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