12299-98-8

Basic information

• Product Name: manganese diselenide
• Synonyms: manganese diselenide;Einecs 235-569-6;Manganese selenide (mnse2)
• CAS NO: 12299-98-8
• Molecular Formula: MnSe2
• Molecular Weight: 212.858049
• EINECS: 235-569-6
• Mol File: 12299-98-8.mol
• Article Data: 7

Chemical Properties

• Boiling Point: °Cat760mmHg
• Flash Point: °C
• Appearance: /
• Density: g/cm³
• CAS DataBase Reference: manganese diselenide(CAS DataBase Reference)
• NIST Chemistry Reference: manganese diselenide(12299-98-8)
• EPA Substance Registry System: manganese diselenide(12299-98-8)

Safety Data

• Hazardous Substances Data: 12299-98-8(Hazardous Substances Data)

Usage

Description

Manganese diselenide, with the chemical formula MnSe2, is a black, crystalline solid that consists of manganese and selenium atoms. It features a layered structure and is known for its unique magnetic and electrical properties, making it a promising material for a variety of industrial and technological applications.

Uses

Used in Electronic Devices:
Manganese diselenide is utilized as a component in electronic devices due to its electrical properties, which contribute to the performance and efficiency of these devices.
Used in Batteries:
In the energy storage industry, manganese diselenide serves as a material in batteries, leveraging its chemical and physical characteristics to enhance battery performance and longevity.
Used as a Catalyst in Chemical Reactions:
Manganese diselenide is employed as a catalyst to facilitate and expedite various chemical reactions, taking advantage of its reactivity and stability under different conditions.
Used in Semiconductor Material Research:
The material is being investigated for its potential use as a semiconductor, which could lead to advancements in future technologies, given its unique electronic properties that are beneficial for semiconductor applications.
Used in Magnetic Applications:
Due to its magnetic properties, manganese diselenide is also considered for use in applications that require magnetic materials, such as in data storage or sensing technologies.

InChI:InChI=1/Mn.2Se/rMnSe2/c2-1-3

Upstream product

• 7439-96-5 manganese 
• 7782-49-2 selenium 
• 7440-56-4 germanium 
• 12775-96-1 copper 
• 7440-66-6 zinc 

Relevant articles and documents

MAGNETIC ORDERING IN MnSe//2.

Neutron diffraction experiments on polycrystalline samples of MnSe//2 performed in the temperature range 1. 8 to 54K show a first-order magnetic phase transition at T//N equals 49 K. The existence of the third-order harmonics below T//N shows the magnetic structure of MnSe//2 to be of commensurate square-wave type given by the wave vectors k equals left bracket 1/301 right bracket and 3k equals left bracket 010 right bracket .

Synthesis, crystal structures and properties of the polychalcogenides manganese-tris(1,2-ethanediamine)-triselenide [Mn(en)3]Se3 and manganese-tris(1,2-ethanediamine)-monotellurodiselenide[Mn(en) 3]TeSe2

The reaction of manganese (II)-chloride-tetrahydrate, caesium triselenide and elemental selenium or tellurium in 1,2-ethanediamine (en) under solvothermal conditions leads to the formation of two new isostructural compounds [Mn(en)3]Se3 (1) and [Mn(en)3]TeSe2 (2). The compounds crystallize in the orthorhombic space group Pbcn with the lattice parameters a = 1149.39(9), b = 1506.83(11), c = 935.96(6) pm for 1 and a = 1184.1(2), b = 1495.3(2), c = 949.8(1) pm for 2. Their crystal structures are built up of [Mn(en)3]2+ cations and Se32- or TeSe22- anions, respectively. Each cation is surrounded by six next neighbouring anions, and vice versa. Between the cations and the anions hydrogen bonding is observed. The thermal behaviour was investigated using differential thermal analysis, thermogravimetry as well as X-ray powder diffraction. Completely different properties were found. Compound 1 decomposes in two distinct endothermic steps, while compound 2 shows only one endothermic peak. The weight loss for 1 corresponds roughly to the emission of all en molecules, whereas the weight loss for 2 is significantly lower. The final products are composed of MnSe2 and elemental Se or Te, respectively, and an unknown crystalline phase which is different for the two samples.

Syntheses and crystal structures of the two new polychalcogenides

The solvothermal reaction of MnCl2·4 H2O, K2Se3 and Se in trans-cyclohexane-1,2-diamine (chxn) at 433 K yields dark blue crystals of [Mn(chxn)3]Se6 (1), and the reaction of MnCl2·4 H2O, K2Se 3 and Te under similar conditions gives dark blue crystals of [Mn(chxn)3]2[H2chxn](TeSe2) 2Se (2). While compound (1) crystallises in the orthorhombic space group Pbcn with the lattice parameters a = 13.7017(9), b = 19.9073(8) and c = 10.8058(5) A?, compound (2) crystallises in the monoclinic space group P21 with the lattice parameters a = 9.4396(6), b = 24.2450(2), c = 12.8170(8) A? and β = 91.6(1)°. In both structures discrete complex cations and polychalcogenide anions are found. In (1) the Se6 2- anions form a pseudo-layer arrangement with nearly rectangular pores. The complex cations are encapsulated by the arrangement of the Seg 2- anions. Some short distances between the amino groups of the ligands and the anions indicate weak hydrogen bonding. In compound (2) two independent [Mn(chxn)3]2+ and one unique H2chxn dications, two unique TeSe22- as well as one Se 2- dianion coexist. The two complex cations exhibit different conformations. One of the two TeSe22- anions has the di-protonated chxn molecule in the neighbourhood and short Se?H separations indicate weak hydrogen bonding. The isolated Se2- ion is located above the ring of the di-protonated trans-cyclohexane-1,2-diamine molecule and again a short Se?H separation may be due to a weak hydrogen bond. Compound (1) decomposes in a single step when heated in an Ar atmosphere. In contrast, the thermal decomposition of compound (2) is complex and at least five different steps can be identified.