Селенид европия (EuSe)

Description

Europium selenide (EuSe) is a binary inorganic compound of europium and selenium. The divalent form of europium gives the compound magnetic properties studied in solid state physics: EuSe is known as a model magnetic semiconductor with a complex magnetic phase diagram.

Basic Attributes

• CAS No.: 12020-66-5
• Chemical Formula: EuSe
• Molecular Weight: 230.92
• Exact weight: 233.84600
• EU number: 234-662-9
• PSA specifications: 0 Å2
• XLogP3: -0.26830
• Catalog section: inorganic salts

Synonyms

• Europium monoselenide
• Additional CAS No.: 2374824-40-3

Physico-chemical characteristics

• Density: 7.110
• Melting point: 1213 °C

Substance class and application

Inorganic europium(II) chalcogenide crystallizes in a sodium chloride-type lattice, characteristic of compounds of rare earth elements with sulfur, selenium and tellurium. Compounds of divalent europium, including selenide, are used as model materials in the physics of magnetic semiconductors and spintronics, as well as components of blue and green phosphors. In the series of related europium chalcogenides (sulfide, selenide, telluride), selenide occupies an intermediate position in melting point and serves as the object of comparative studies of magnetic phase transitions.

Europium compounds: general context

Europium is one of the most popular rare earth elements in optoelectronics. Eu3+ ions act as activators of narrow-band red phosphors of displays, cathode ray tubes, lamps and security marks of banknotes, Eu2+ ions act as activators of blue and green phosphors and scintillators. Europium salts, oxides and chalcogenides are also used as precursors for the preparation of other europium compounds by methods of precipitation and thermal decomposition, as shifting reagents for NMR spectroscopy, and as an object for studying the magnetic and optical properties of rare earth materials.

Applications of europium compounds

Europium compounds are the basic raw materials of rare earth chemistry for the production of phosphors: trivalent europium is responsible for the red glow in screens and lamps, divalent europium is responsible for the blue and green glow in lighting and scintillation materials. In addition to phosphors, europium salts and oxides are used as catalysts, components of magnetic and optical materials, analytical chemistry reagents, and an object for research in the inorganic chemistry of f-elements.

Storage and transportation

Store in a tightly closed container, in a dry place, away from sources of moisture and oxidizing agents - rare earth metal chalcogenides can oxidize in air. There is no data on transport codes, hazard class and GHS classification in the original dump; When working, general precautions for fine inorganic powders and respiratory protection in case of dust are recommended. The hazard class has not been established based on available data.