What is isomorphic substitution and what is eutectic reaction

Analysis of the concept of isomorphic substitution is also known as isomorphic substitution (isomorphic substitution).

When a mineral is crystallized, the position occupied by a certain ion or atom in the crystal structure is partially occupied by other ions or atoms with similar properties and sizes, but the crystal structure type is basically unchanged. Also known as isomorphic substitution.

When a mineral is crystallized, the position occupied by a certain ion or atom in the crystal structure is partially occupied by other ions or atoms with similar properties and sizes, but the crystal structure type is basically unchanged.

Isocrystalline substitution specifically introduces the phenomenon that Al3+ replaces Si4+ or Mg2+ replaces Al3+ in the formation of clay mineral crystals such as mica and montmorillonite in the soil, and the crystal shape is basically unchanged, but the electric price in the crystal is unbalanced, resulting in residual negative charge, thereby adsorbing cations. This is one of the important reasons why the soil retains nutrients.

For example, the formation of clay mineral crystals such as mica and montmorillonite in the soil often occurs when Al3+ replaces Si4+ or Mg2+ replaces Al3+, and the crystal shape is basically unchanged, but the electric price in the crystal is unbalanced, resulting in residual negative charge, thereby adsorbing cations. This is one of the important reasons why the soil retains nutrients. At the same time, it will also cause the enrichment of heavy metals such as cationic lead and nickel.

Introduction to the crystal structure:

Crystal structure, i.e., the microstructure of a crystal, refers to the specific arrangement of the actual particles (atoms, ions, or molecules) in the crystal. Solid substances existing in nature can be divided into two categories: crystalline and amorphous, and most of the solid metals and alloys are crystalline.

The essential difference between crystals and amorphous is that the atoms, ions, molecules, and other particles that make up crystals are arranged regularly (long programs), while these particles in noncrystals are basically irregularly stacked together except for the closest to them (short programs). Metals and alloys are used in most cases in a crystalline state. Crystal structure is one of the fundamental factors that determine the physical, chemical, and mechanical properties of solid metals.

The above content reference: Encyclopedia - Isomorphic Replacement.

Encyclopedia - Crystal structure.

In the formation of clay minerals, it is common for ions of a similar radius to replace a part of aluminum () or silicon (). This substitution is called isomorphic substitution. Generally, it is the substitution of lower valence cations with similar radius, such as m and f ions instead of aluminum (), and a ions instead of silicon ().

As a result of isomorphic substitution, clay mineral microparticles have an excess negative charge.

It is precisely because of the attraction of negative charge that the positively charged ions that are beneficial to plant growth can be adsorbed by the soil, so the plant roots can use it.

Eutectic reaction refers to the reaction in which a liquid of a certain composition crystallizes two solid phases of a certain composition at a certain temperature at the same time.

The resulting two solid phases are mechanically mixed together to form a basic structure with a fixed chemical composition, collectively known as eutectics. There are three phases coexisting when eutectic reactions occur, their respective compositions are determined, and the reaction proceeds in equilibrium at a constant temperature.

Hello dear, glad to answer for you, the answer is that eutectic and non-eutectic are two different states in the phase transition of a solid state. Eutectic refers to the presence of two or more different components in the phase diagram and they reach eutectic equilibrium in a solid state, that is, at the eutectic temperature, all liquids cannot solidify into a single solid substance, but become a mixture of two or more solid substances. Non-eutectic radical sons, on the other hand, refer to the presence of two or more different components in the phase diagram that do not reach eutectic equilibrium in the solid state, i.e., the separation of the solid components at a specific temperature to form different crystal structures.

The difference between eutectic and non-eutectic is the state in which they are located. Eutectic means that two or more components are evenly combined at eutectic temperature to form a new solid substance. Non-eutectic means that two or more components are separated into different solid substances when they solidify at a specific temperature. Hope you can.

In the formation of clay minerals, it is common for ions of a similar radius to replace a part of aluminum () or silicon (). This substitution.

This is called isomorphic substitution. Generally lower valence cations of similar radius.

substitution, such as m, f plasma instead of aluminum (), a ion instead of silicon (). As a result of isomorphic substitution, clay mineral microparticles have an excess negative charge.

It is due to the attraction of the negative charge that makes the positive charge favorable for the growth of the plant.

The ions can be adsorbed by the soil, so the roots of the plant can be utilized.

The structure of a crystal has a decisive influence on the physical properties of matter. In the case of carbon, for example, its different structures form very different crystals, and therefore its properties are very different.

The carbon atom can form 4 sp3 hybrid c-c covalent single bonds with the adjacent carbon atoms

At. Clay minerals.

In the formation process, ions of similar radius often replace a part of aluminum () or silicon (). This substitution.

This is called isomorphic substitution. Generally, the family is the lower price with a similar radius.

Positive ions. substitution, such as m, f plasma instead of aluminum (), a ion instead of silicon (). The result of the vertical scramble of isocrystaltic substitution is that the clay mineral particles have a surplus.

Negatively charged. It is due to the attraction of the negative charge that makes the band favorable for the growth of the plant.

Positive panicle file charge.

The ions can be adsorbed by the soil, so the plant roots can use them.

Eutectic materials refer to composite materials that have been formed by eutectic reaction!

Eutectic refers to the phenomenon of eutectic solder fusing at a relatively low temperature, which is an equilibrium reaction in which two solids are generated simultaneously in a liquid state. Because its eutectic temperature is lower than the melting point of any substance, eutectic alloys can change directly from solid to liquid without going through the plastic stage and without changes in their internal structure. Widely used in the metal heat treatment industry.

When the concentration of two ions is approximately equal, and one element enters the lattice of the other element in a dispersed amount, and the major element and the minor element can be separated, the minor element is hidden in the main element.

1) Definition: refers to the ability of an element to form cations and the tendency of cations to selectively combine with an anion in a natural system. 2) Affinity includes: strong. Oxyphilic elements are mainly.

Therefore, as expected from the isomorph characteristic, the chain axis and chain symmetry of the two isomorph systems are identical.

Refers to the ability of an element to form cations and the tendency of cations to selectively combine with an anion in a natural system.

Crystal structure refers to the periodic structure of the crystal, that is, the regular and repeated arrangement of internal atoms. The specific form of the arrangement of atoms inside the crystal is generally called the crystal lattice, and the arrangement of the atoms inside the crystal is called to have different lattice structures, and the various lattice structures can be summarized into seven crystal systems according to the symmetry characteristics.

Some of the concepts of the child manager, their feelings contain a lot of conceptual opportunities.

The concept of the sympathetic systemThe concept of the sympathetic system. It is a system composed of the same crystals.

The concept of crystals is a species, which is called copper crystals.

The concept of the sympathetic system is that it is the same economy after it has been processed.