A crystalline material consists of primarily organized crystal structure.
A crystal is: a solid composed of atoms, ions, or molecules arranged in a pattern that is repetitive in three-dimensions.
Each crystal structure within a specific crystal system is defined by a unit cell.
Any structure of ions, molecules, or atoms that are held together in an ordered, three-dimensional arrangement
According to wikipedia…
In crystallography, crystal structure is a description of the ordered arrangement of atoms, ions or molecules in a crystalline material. Ordered structures occur from the intrinsic nature of the constituent particles to form symmetric patterns that repeat along the principal directions of three-dimensional space in matter. The smallest group of particles in the material that constitutes this repea...
Table of contents
- What does crystalline structure mean
- Can crystalline structure change
- Can crystalline structure decay
- How to determine the crystalline structure
- How does the crystalline structure affect properties of materials
- How does crystalline structure work
- Crystalline structure has high density
- Crystalline structure ionic or covalent
- Crystalline structure strength
- Crystalline structure solubility
- Crystalline structure types
- Crystalline structure vs amorphous
- Can steel have a crystalline structure
- How to identify crystalline solids
- How to create crystalline structures
What does Crystalline Structure Mean
A crystalline structure is any structure of ions, molecules, or atoms that are held together in an ordered, three-dimensional arrangement.
Crystalline structure is one of two types of structural ordering of atoms, the other being the amorphous structure.
Can Crystalline Structure Change
It is possible to change the external shape of the crystal by changing the crystallization condition.
How to Determine The Crystalline Structure
XRD
XRD is an important method to characterize the structure of crystalline material.
It can be used to determine either the lattice parameters, arrangement of individual atoms in a single crystal, or the phase anaylysis in case of polycrystalline materials and compunds.
How does The Crystalline Structure Affect Properties Of Materials
The structure of the atoms affects the properties of the material, for example FCC metals and alloys have very good ductility.
The crystal structure contains imperfections, such as point defects (for example solute atoms, vacancies) and dislocations, and these govern many of the properties of the material.
How does Crystalline Structure Work
Crystalline structure is one of two types of structural ordering of atoms, the other being the amorphous structure.
Crystalline structure has high density
Clarification: A crystalline structure has very close packing of atoms thus giving rise to high density to material it possesses when compared to its non-crystalline form.
For example, quartz being the crystalline form of silica has a density of about 2.65 gm/cm3, whereas its non-crystalline form silica glass has a density of 2.20 gm/cm3.
Crystalline structure ionic or covalent
Ionic.
crystals are composed of alternating positive and negative ions.
Metallic crystals consist of metal cations surrounded by a “sea” of mobile valence electrons.
Covalent crystals are composed of atoms which are covalently bonded to one another.
Crystalline structure strength
It was found that the body-centered-cubic crystal structure is always the softer structure when it is involved in an allotropic transformation.
The close-packed and more complex structures are inherently harder, and may be expected, therefore, to be better base materials for high strength alloys.
Crystalline structure solubility
The crystal structure and symmetry play a critical role in determining many physical properties, such as cleavage, electronic band structure, and optical transparency.
Crystalline structure types
Seven crystal systems: triclinic, monoclinic, orthorhombic, hexagonal, rhombohedral, tetragonal, and cubic
Each crystal lattice is defined by a crystal system.
In three-dimensions, there are seven crystal systems: triclinic, monoclinic, orthorhombic, hexagonal, rhombohedral, tetragonal, and cubic.
These collection of systems are called the Bravais lattices.
Crystalline structure vs amorphous
Crystalline solids have well-defined edges and faces, diffract x-rays, and tend to have sharp melting points.
In contrast, amorphous solids have irregular or curved surfaces, do not give well-resolved x-ray diffraction patterns, and melt over a wide range of temperatures.
Can Steel Have A Crystalline Structure
The vast majority of metals have a crystalline structure in their solid state, meaning that they are made up of crystallized lattice structures of atoms.
By definition, all steels, including stainless steels, are primarily made up of crystallized iron atoms with the addition of carbon.
How to Identify Crystalline Solids
Well-defined edges and faces, diffract x-rays, and tend to have sharp melting points.
Crystalline solids have well-defined edges and faces, diffract x-rays, and tend to have sharp melting points.
In contrast, amorphous solids have irregular or curved surfaces, do not give well-resolved x-ray diffraction patterns, and melt over a wide range of temperatures.
How to Create Crystalline Structures
Crystals form in nature when molecules gather to stabilize when liquid starts to cool and harden.
Many crystals start small but as more atoms join and create a uniform and repetitive pattern, the crystal grows.
This is how crystals are formed in nature.
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