3C Zincblende Structure
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An example is that crystalline silicon carbide (SiC) has structures of tetrahedrally coordinated lattice. The atomic layers can stack in cubic (C), hexagonal (H),or rhombohedral (R) configurations. These structures are labeled by the symmetry (C, H, or R) following the number of the layers in one period of the stacking sequence. Therefore, 3C is equivalent to the zincblende structure, while 2H is the wurtzite structure. The most common commercially available form is 6H-SiC.

The zincblende structure is in a symmetry group with three twofold axes, eight threefold axes, four fourfold axes, and six symmetry planes, but it does not have an inversion symmetry.

Table 2081. Properties of some zincblende structures.

Lattice constant (a, nm)
AlAs 0.566
AgI 0.647
AlP 0.545
AlSb 0.613
BeS 0.485
BeSe 0.507
BeTe 0.554
CdS 0.582
CdTe 0.648
CuBr 0.569
CuCl 0.541
CuI 0.604
GaAs 0.565
GaSb 0.612
GaP 0.545
HgS 0.585
HgSe 0.608
HgTe 0.643
InAs 0.604
InP 0.587
InSb 0.646
SiC 0.435
ZnS 0.541
ZnSe 0.565