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Personalized Crystal Plaques

Crystals can be divided into four types according to their structural particles and forces: ionic crystal, atomic crystal, molecular crystal and metallic crystal. Solid can be divided into crystal, amorphous and quasicrystal. Solid materials with neat and regular geometry, fixed melting point...

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Crystals can be divided into four types according to their structural particles and forces: ionic crystal, atomic crystal, molecular crystal and metallic crystal.


Solid can be divided into crystal, amorphous and quasicrystal.


Solid materials with neat and regular geometry, fixed melting point and anisotropy are a basic form of material existence. Whether a solid substance is a crystal can be generally identified by X-ray diffraction.


The particle points (atoms, ions, molecules, and atomic groups) in the internal structure of a crystal are regularly arranged in three dimensional space in a periodic and repeated manner, forming a certain form of lattice, and appearing as geometric polyhedrons of a certain shape. The plane that constitutes a certain geometric polyhedron is called the crystal surface. Due to the different growth conditions, the crystal may be a little crooked in appearance, but the Angle between the same crystal surfaces (the grain surface Angle) is certain, which is called the invariant principle of the grain surface Angle.


The crystal can be divided into seven crystal systems and 14 lattice types according to its internal structure. Crystal has certain symmetry, there are 32 symmetrical element systems, the corresponding symmetric action group is called crystal system point group. According to the different properties of internal particle forces, the crystal can be divided into four typical crystals, such as ionic crystal, atomic crystal, molecular crystal and metal crystal, such as salt, diamond, dry ice and various metals. The same crystal also has the distinction of single crystal and polycrystalline (or powder crystal). In practice, mixed crystals exist. When it comes to crystals, you have to start with crystals. As you know, all substances are made of atoms or molecules. As is known to all, matter has three forms of aggregation: gas, liquid and solid. But do you know how many types of solids can be classified according to their internal structural characteristics? The results show that solid can be divided into crystal, amorphous and quasicrystal.


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