Samarium(3+) Trifluoride

Samarium (3 +) trifluoride, also known as samarium fluoride ($SmF_3 $), has important applications in many fields.
In the ceramic field, it can be used as an excellent additive. It can significantly improve the thermal stability and chemical stability of ceramic materials, so that ceramics can still maintain good performance under high temperatures and complex chemical environments. Due to its special crystal structure and chemical properties, it can optimize the internal microstructure of ceramics, enhance the bonding force between crystals, and then improve the mechanical properties of ceramics, such as hardness and toughness, making ceramic products more durable. It is widely used in high-temperature industrial kiln linings, chemical corrosion-resistant pipelines, etc.
In terms of optical materials, samarium fluoride shines brightly. Due to its unique absorption and emission characteristics of specific wavelengths of light, samarium fluoride is often used in the manufacture of optical glass and luminescent materials. Adding samarium fluoride to optical glass can adjust the refractive index and dispersion characteristics of the glass, improve the quality of optical imaging, and is indispensable in the manufacture of high-end optical lenses, telescopes and other optical instruments. As a luminescent material, in the preparation of phosphors, samarium fluoride can emit specific color light after activation, which is used in lighting and display fields, such as fluorescent lamps, liquid crystal display backlights, etc., to make the display color more rich and realistic.
In the field of electronics industry, samarium fluoride also plays an important role. In the preparation of semiconductor materials, it can be used as a dopant to precisely regulate the electrical properties of semiconductors, optimize their carrier concentration and mobility, and improve the performance of semiconductor devices, such as transistors, integrated circuits, etc., which is of great significance for the miniaturization and high performance of electronic devices. In addition, in magneto-optical storage materials, samarium fluoride participates in the construction of magneto-optical storage media, and uses its magneto-optical effect to realize data storage and reading, providing assistance for the development of information storage technology.
In the field of nuclear industry, samarium fluoride also plays a unique role. Since samarium isotopes have a large absorption cross section for neutrons, samarium fluoride can be used to manufacture neutron absorption materials such as nuclear reactor control rods. During the operation of the reactor, samarium fluoride in the control rod can effectively absorb neutrons, precisely adjust the neutron flux in the reactor, and ensure the safe and stable operation of the reactor. It is crucial to the power control and safety protection of the nuclear reactor.

Samarium (ⅲ) trifluoride, that is, $SmF_ {3} $, has specific physical properties. Although it is not detailed in ancient books, it can be obtained from the scientific perspective of today.
Looking at its shape, $SmF_ {3} $is a white powder-like substance at room temperature and pressure. The state of the powder makes it have a large specific surface area, and it is easier to contact and interact with other substances in many reactions and applications. Its texture is delicate, like frost and snow. When touched lightly, it seems to be smooth, but it is not as greasy as grease.
When it comes to the melting point, the melting point of $SmF_ {3} $is quite high, about 1376 ° C. Such a high melting point is due to the characteristics of its internal chemical bonds. The ionic bond is dominant in the $SmF_ {3} $, and the samarium ion and the fluoride ion are connected by a strong electrostatic attractive force. In order to disintegrate the lattice and melt the substance, a large amount of energy needs to be input to overcome this attractive force, so its melting point is very high. This high melting point characteristic enables $SmF_ {3} $to maintain solid state stability in high temperature environments, and has potential applications in refractory materials, high temperature ceramics and other fields.
In terms of density, the density of $SmF_ {3} $is about 7.75 g/cm ³. The relatively large density shows the tightness of its atoms. The relative atomic mass of samarium atoms is large, and the ordered arrangement of fluorine atoms with them increases the mass of the substance per unit volume. This density property is crucial in material selection and design. For example, in some situations where high-density materials are required to achieve specific functions (such as shielding radiation, etc.), $SmF_ {3} $may be taken into account.
As for solubility, $SmF_ {3} $is insoluble in water. Due to the high chemical bond energy between fluoride ions and samarium ions, it is difficult for the polarity of water to effectively break the ionic bond and dissociate it. However, in specific media such as strong acids, $SmF_ {3} $can undergo chemical reactions and dissolve. The insolubility in water makes it relatively stable in humid environments and can be applied to water-sensitive systems. The magnetic properties of
$SmF_ {3} $are also characteristic. Due to the electronic structure of samarium ions, their compounds often exhibit magnetism. The magnetism of $SmF_ {3} $is affected by factors such as temperature and external magnetic field. At low temperatures, its magnetic ordering phenomenon is significant, which can be used in the preparation of magnetic materials and provide a material basis for the development of information storage, magnetic sensors and other technologies.

Samarium (III) trifluoride (Samarium (3 +) Trifluoride, chemical formula SmF <), is an important inorganic compound. It has many unique chemical properties, which are described in detail by you.
First of all, its stability is quite stable. At room temperature and pressure, it can maintain its own structure and chemical composition for a long time. This stability is due to the strong electrostatic interaction between samarium ions (Sm ³) and fluoride ions (F <). Fluoride ions are extremely electronegative and have a strong binding force on samarium ions, forming stable ionic bonds, making it difficult for SmF
to react easily with ordinary substances in the outside world. Due to the high lattice energy, the hydration energy is not enough to overcome the lattice energy, so it is not easy to dissociate into ions and dissolve in water. However, in a specific acidic environment, such as concentrated hydrochloric acid and concentrated sulfuric acid, under heating conditions, a chemical reaction can occur to dissolve. If reacted with concentrated hydrochloric acid, the corresponding samarium salt and hydrogen fluoride gas will be formed. This is because the strong acid action changes the reaction equilibrium and promotes the dissolution of SmF.
Re-discuss its oxidation and reduction properties. Sm ³ is in a relatively stable oxidation state, and under normal conditions, the oxidation and reduction properties of SmF are weak. However, in the case of strong reducing agents, such as sodium metal, samarium ions can be reduced to a low-priced state and exhibit certain oxidizing properties; in the case of extremely strong oxidizing agents, they may also be further oxidized, but such reaction conditions are quite harsh.
When it comes to coordination properties, Sm ³ has an empty orbit, which can be used as a central ion to form a complex with a lone-pair electron ligand. Fluoride ions can be used as ligands to compete for coordination with other metal ions or organic ligands. Under suitable conditions, SmF ³ can participate in the formation of a variety of coordination compounds. This coordination property has important applications in the fields of materials science and catalysis. SmF has unique chemical properties, such as stability, solubility, redox and coordination, which make it show unique value and application potential in many fields such as ceramic materials, optical materials, catalyst preparation, etc.

There are two ancient methods for the preparation of samarium (ⅲ) trifluoride.
First, samarium oxide is combined with hydrofluoric acid. Take samarium oxide and place it in an acid-resistant vessel, and slowly inject hydrofluoric acid. The reaction formula is: $Sm_2O_3 + 6HF\ longrightarrow 2SmF_3 + 3H_2O $. In this process, it must be noted that hydrofluoric acid is highly corrosive, and the reaction generates heat. When the reaction is completed, the resulting mixture is evaporated and crystallized to obtain a crystal of samarium trifluoride.
Second, react with a fluoride phase with a salt containing samarium. Samarium chloride and sodium fluoride are often taken, dissolved in water, and mixed. The reaction formula is: $SmCl_3 + 3NaF\ longrightarrow SmF_3\ downarrow + 3NaCl $. The samarium trifluoride generated by this reaction is a precipitate, which can be separated by filtration. After washing with water several times to remove its impurities, it is dried to obtain pure samarium trifluoride.
Preparation of samarium trifluoride, according to the required purity, yield and actual conditions, choose the appropriate method. And when preparing, safety procedures must be strictly followed to prevent harmful substances from hurting people.

Samarium (III) trifluoride is samarium trifluoride, and the price in the market varies depending on the quality, source, and purchase quantity. If it is an ordinary commercial product, the price per gram may be in the tens of yuan when the quantity is small. However, if the purchase quantity is large, such as kilograms, the unit price may be reduced to the spectrum of several yuan per gram.
If it is a high-purity, specially prepared samarium trifluoride, used in scientific research and high-end industry, the price is higher. High-purity products may cost more than 100 yuan per gram, or even hundreds of yuan. Because of its difficult preparation, strict requirements for purity require fine processes and equipment, and the cost is high.
And market conditions fluctuate, and changes in raw material prices and supply and demand can affect their prices. If raw materials are scarce and demand exceeds supply, prices will rise; conversely, if supply exceeds demand, prices may decline. Therefore, to know the exact price, when consulting chemical raw material suppliers and relevant trading platforms, real-time prices can be obtained.