In crystallography, the diamond cubic crystal structure is a repeating pattern of 8 atoms that certain materials may adopt as they solidify. While the first known example was diamond, other elements in group 14 also adopt this structure, including α-tin, the semiconductors silicon and germanium, and silicon–germanium alloys in any proportion.

2022年11月24日 · The diamond cubic crystal structure is based on the face-centered cubic Bravais lattice (you can imagine it as two FCC unit cells, offset by ¼). There are 8 atoms per unit cell, and each atom is tetrahedrally coordinated so that it has 4 nearest neighbors.

2022年8月28日 · The diamond cubic structure consists of two interpenetrating face-centered cubic lattices, with one offset 1/4 of a cube along the cube diagonal. It may also be described as face centered cubic lattice in which half of the tetrahedral sites are filled while all the octahedral sites remain vacant.

Conventional unit cell of the diamond structure: The underlying structure is fcc with a two-atomic basis. One of the two atoms is sitting on the lattice point and the other one is shifted by $\frac{1}{4}$ along each axes.

2023年5月31日 · A diamond’s crystal structure is a face-centered cubic or FCC lattice. In typical tetrahedrons (triangular prisms), each carbon atom connects four other carbon atoms. Diamond crystals can form into a variety of shapes known as ‘crystal habits’ due to its cubic form and highly symmetrical atom arrangement.

• The crystal structure depends on the relative charge and size per ion. • Na+ions are about half of Cl-ions, which results 6 nearest neighbors. • The crystal can be described as two interpenetrating FCC unit cells, each having oppositely charged ions at the corners and face centers. Ionic Solid: CsCl 6

2016年10月1日 · This picture by Greg Egan shows the pattern of carbon atoms in a diamond, called the ‘diamond cubic’. Each atom is bonded to four neighbors. This pattern is found not just in carbon but also other elements in the same column of …

The crystal structure of diamond is equivalent to a face-centred cubic (FCC) lattice, with a basis of two identical carbon atoms: one at (0, 0, 0) and the other at (1/4, 1/4, 1/4), where the coordinates are given as fractions along the cube sides.

Diamonds are naturally occurring solid forms of carbon with atoms grouped in a diamond cubic crystal structure. In a diamond, each carbon atom is surrounded by four other carbon atoms linked together by covalent bonds.

DIAMOND CRYSTAL STRUCTURE: The unit cell (red) of diamond is a cube. Groups of five carbon atoms (blue spheres) form tetrahedra at the cube corners, at the centers of each of the cube faces, and at four sites within the cube.