A report on Crystal system and Pyroelectricity

The diamond crystal structure belongs to the face-centered cubic lattice, with a repeated two-atom pattern.
Pyroelectric sensor
Hexagonal hanksite crystal, with threefold c-axis symmetry

Some geometrical or physical property is different at the two ends of this axis: for example, there might develop a dielectric polarization as in pyroelectric crystals.

- Crystal system

All crystal structures belong to one of thirty-two crystal classes based on the number of rotational axes and reflection planes they possess that leave the crystal structure unchanged (point groups).

- Pyroelectricity
The diamond crystal structure belongs to the face-centered cubic lattice, with a repeated two-atom pattern.

1 related topic with Alpha

Overall

Crystal structure of table salt (sodium in purple, chloride in green)

Crystal structure

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Description of the ordered arrangement of atoms, ions or molecules in a crystalline material.

Description of the ordered arrangement of atoms, ions or molecules in a crystalline material.

Crystal structure of table salt (sodium in purple, chloride in green)
Planes with different Miller indices in cubic crystals
Dense crystallographic planes
The hcp lattice (left) and the fcc lattice (right)
Quartz is one of the several crystalline forms of silica, SiO2. The most important forms of silica include: α-quartz, β-quartz, tridymite, cristobalite, coesite, and stishovite.
Simple cubic (P)
Body-centered cubic (I)
Face-centered cubic (F)

They are similar to, but not quite the same as the seven crystal systems.

All polar crystals are pyroelectric, so the 10 polar crystal classes are sometimes referred to as the pyroelectric classes.