Thekey difference between crystals and quasicrystalsis that crystals have an ordered structure that is periodic, whereas quasicrystals also have an ordered structure that is not strictly periodic.
The terms crystals and quasicrystals are useful in the field of crystallography that falls under industrial chemistry. Crystals are the monomeric units of crystalline materials, while quasicrystals are types of crystals that contain arrays of atoms that are in an ordered manner but are not strictly periodic.
内容
1.Overview and Key Difference
2.什么are Crystals
3.什么are Quasicrystals
4.Similarities – Crystals and Quasicrystals
5。Crystals vs Quasicrystals in Tabular Form
6。摘要 - 晶体与准晶体
什么are Crystals?
Crystals are the monomeric units of crystalline materials. These solid crystalline compounds contain their atoms, molecules or ions arranged in a highly ordered microscopic structure. These units make up the crystal lattice of the crystalline material. The水晶格子can extend in all directions. Additionally, we can identify microscopic single crystals of crystalline materials using geometrical shapes. When considering geometric shapes, the crystals consist of flat faces that have specific and characteristic orientations. Moreover, the field of studying crystals is crystallography. We call the process of formation of crystals crystal growth orcrystallization.
In the crystal structure, the atoms, molecules, or ions are arranged in a periodic arrangement. However, all solids are not crystals. There can be non-crystalline substances, as shown in the above image. If we consider water when water starts to freeze, the phase of matter changes from liquid to solid and small ice crystals tend to grow until the fusion occurs (which forms a多晶结构体)。
We can show a unit cell for crystalline material. The unit cell is an imaginary box that contains one or more atoms in a specific arrangement. Typically, the unit cells tend to stack in a 3D arrangement, forming a crystal. We can recognize the crystals from their shape according to the faces having sharp angles.
Crystallization is the process from which crystals are formed from a fluid or dissolved materials in a fluid. The field of crystallization is very wide because a single fluid is able to solidify into many different forms depending on conditions. Therefore, it is a complex and extensively studied field.
什么是准晶体?
准晶体是一种包含以有序方式但并非严格周期性的原子阵列的晶体。因此,准晶体可能与正常晶体有一些相似之处。正常晶体和准晶体之间的相似性如下所示。
Typically, this type of crystal is well-known for its ability to show five-fold symmetry. This symmetry is impossible in normal periodic crystals. Therefore, the International Union of Crystallography has redefined “crystals” to include details about quasicrystals.
The discovery of quasicrystals took place in 1982. The formation of these crystals is a rare thing because only about 100 known solids tend to form quasicrystals among the 400,000 normal periodic crystals forms known until 2004. Moreover, Dan Shechtman received the Nobel prize for the discovery of quasicrystals.
什么are the Similarities Between Crystals and Quasicrystals?
- Crystals and quasicrystals are types of crystalline material.
- 他们在X射线衍射中显示离散模式。
- Both are able to form shapes with smooth and flat faces.
晶体和准晶体有什么区别?
The terms crystals and quasicrystals are useful in the field of crystallography. There are differences between them as well as some similarities between these terms. The key difference between crystals and quasicrystals is that crystals have an ordered structure that is periodic as well, whereas quasicrystals also have an ordered structure that is not strictly periodic.
The below infographic lists the differences between crystals and quasicrystals in tabular form for side by side comparison.
摘要 - 晶体与准晶体
准晶体是一种晶体。根据它们的化学结构,它们与普通晶体不同。晶体和准晶体之间的关键区别在于,晶体的有序结构也是周期性的,而准晶体也具有不严格周期性的有序结构。
Reference:
1.“”什么是水晶?- 国际宝石协会 - IGS。”国际宝石协会, 2 July 2021.
Image Courtesy:
1.“”Crystalline polycrystalline amorphous2” cristal_ou_amorphe.svg:cdangeverytherthing else:sbyrnes321 - cristal ou amorphe.svgcrystalline polycrystalline inorphous.svg(CC BY-SA 3.0)通过Commons Wikimedia
2. “Ho-Mg-ZnQuasicrystal” Ames Lab。,美国能源部- (公共领域)通过CONSONS WIKIMEDIA
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