Сульфид европия (EuS)

Description

Europium sulfide (EuS) is a binary inorganic compound of europium and sulfur. The divalent form of europium in this compound is responsible for its prominence in solid state physics as a ferromagnetic semiconductor material used in spintronics research.

Basic Attributes

• CAS No.: 12020-65-4
• Chemical Formula: EuS
• Molecular Weight: 184.03
• Exact weight: 184.89300
• EU number: 234-661-3
• PSA specifications: 32.1
• XLogP3: 0.64820

Synonyms

• Europium monosulfide
• Europium sulfide (2+)
• 62462-51-5

Physico-chemical characteristics

• Density: 5.78 g/cm3
• Steam pressure: 12,600 mm Hg. Art. at 25 °C

Substance class and application

An inorganic salt of europium, a cation in the +2 oxidation state, which distinguishes europium sulfide from most other compounds of this element in the catalog, where the +3 oxidation state predominates. Compounds of divalent europium are used in the research of magnetic semiconductors and materials for spintronics, as well as components of phosphors with blue and green emission. The structure of EuS belongs to a cubic lattice of the sodium chloride type, characteristic of rare earth chalcogenides.

Europium compounds: general context

Europium salts and chalcogenides are raw materials for inorganic phosphors and functional magnetic materials: the Eu2+ ion is responsible for the blue and green glow of phosphors and for the magnetic properties in semiconductor compounds, the Eu3+ ion in other salts gives a characteristic red glow. Such compounds are the subject of research in inorganic chemistry and solid-state physics of rare earth elements, as well as in the development of materials for spintronics devices and quantum sensors.

Synonyms

Europium monosulfide, europium sulfide (2+), Europium sulfide (EuS), additional CAS number 62462-51-5.

Storage and transportation

Store in a tightly closed container, in a dry place, away from sources of moisture and oxidizing agents, since rare earth metal sulfides can oxidize in air. There is no data on transport codes, hazard class and GHS classification in the original dump - when working, it is recommended to follow general precautions for fine inorganic powders.

General information about europium compounds

Europium is one of the most popular rare earth elements in optoelectronics. Eu3+ and Eu2+ ions are used as activators of phosphors: Eu3+ provides a narrow-band red glow in displays, screens, lamps and banknote security marks, Eu2+ is responsible for blue and green glow in lighting phosphors and scintillators. Europium salts and chalcogenides are also used as precursors for the production of oxides, fluorides and other compounds by thermal decomposition or precipitation and as an object for studying the magnetic and optical properties of rare earth materials.