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Manganese diselenide: Difference between revisions

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{{chembox {{chembox
| Verifiedfields = changed
| verifiedrevid = 376463673 | verifiedrevid = 431675968
| Name = Manganese(II) diselenide | Name = Manganese(II) diselenide
| ImageFile = | ImageFile =
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| OtherNames = | OtherNames =
| Section1 = {{Chembox Identifiers | Section1 = {{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo = 12299-98-8 | CASNo = 12299-98-8
| CASNo_Comment = or 524744-79-4 }}
| EC_number = 235-569-6
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = VJ084QU1P0
| PubChem = 83014
| InChI = 1S/Mn.2Se
| InChIKey = KDAKOPXAEMJUSU-UHFFFAOYSA-N
| SMILES = (=)=
}}
| Section2 = {{Chembox Properties | Section2 = {{Chembox Properties
| Formula = MnSe<sub>2</sub> | Mn=1 | Se=2
| MolarMass = 212.86 g/mol
| Appearance = grey, odorless powder | Appearance = grey, odorless powder
| Density = 5.55 g/cm<sup>3</sup>, solid | Density = 5.55 g/cm<sup>3</sup>
| Solubility = insoluble | Solubility = insoluble
| MeltingPt = | MeltingPt =
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}} }}
| Section7 = {{Chembox Hazards | Section7 = {{Chembox Hazards
| GHSPictograms = {{GHS06}}{{GHS08}}{{GHS09}}
| EUClass = not listed
| GHSSignalWord = Danger
| HPhrases = {{H-phrases|301|331|373|410}}
| PPhrases = {{P-phrases|}}
}} }}
}} }}


'''Manganese(II) diselenide''' is the ] with the formula MnSe<sub>2</sub>. This rarely encountered solid is structurally similar to that of ] (FeS<sub>2</sub>). Analogous to the description of iron pyrite, manganese diselenide is sometimes viewed as being composed of Mn<sup>2+</sup> and Se<sub>2</sub><sup>2-</sup> ions, although being a ], MnSe<sub>2</sub> is not appropriately described in formal oxidation states.<ref>"The Mn-Se (Manganese-selenium) System" Journal of Phase Equilibria , Volume 19, Number 6 , 12/1998 , pp.588-590, M. E. Schlesinger , </ref><ref>The Crystal Structure of Manganese Diselenide and Manganese Ditelluride , Norman Elliott , J. Am. Chem. Soc., 1937, 59 (10) , pp 1958–1962 , </ref> '''Manganese(II) diselenide''' is the ] with the formula MnSe<sub>2</sub>. This rarely encountered solid is structurally similar to that of ] (FeS<sub>2</sub>). Analogous to the description of iron pyrite, manganese diselenide is sometimes viewed as being composed of Mn<sup>2+</sup> and Se<sub>2</sub><sup>2−</sup> ions, although being a ], MnSe<sub>2</sub> is not appropriately described in formal oxidation states.<ref>"The Mn–Se (Manganese–selenium) System" Journal of Phase Equilibria, Volume 19, Number 6, 12/1998, pp.588-590, M. E. Schlesinger ]</ref><ref>The Crystal Structure of Manganese Diselenide and Manganese Ditelluride, Norman Elliott, J. Am. Chem. Soc., 1937, 59 (10), pp 1958–1962 ]</ref>

== Spectroscopy ==
The high‐resolution Mn 2p spectra of the MnSe<sub>2</sub> has two distinct peaks at 642.2 and 653.9 ]s correspond to the Mn 2p3/2 and Mn 2p1/2 spin–orbit components, respectively. The energy difference (Δ 2p) of 11.7&nbsp;eV confirms the presence of Mn<sup>4+</sup> ions in the sample. A good correlation was observed with the literature value for the Mn<sup>4+</sup> state.<ref>{{cite journal |doi= 10.1002/aenm.201301960 |title= Direct Growth of Flower-Like δ-MnO2on Three-Dimensional Graphene for High-Performance Rechargeable Li-O2Batteries |year= 2014 |last1= Liu |first1= Shuangyu |last2= Zhu |first2= Yunguang |last3= Xie |first3= Jian |last4= Huo |first4= Ying |last5= Yang |first5= Hui Ying |last6= Zhu |first6= Tiejun |last7= Cao |first7= Gaoshao |last8= Zhao |first8= Xinbing |last9= Zhang |first9= Shichao |journal= Advanced Energy Materials |volume= 4 |issue= 9 }}</ref> No peaks for Mn<sup>2+</sup> ions were observed at 640–641&nbsp;eV, which confirmed the formation of only the Mn<sup>4+</sup> oxidation state with a d<sup>3</sup> electronic configuration. The Se 3d spectra were deconvoluted into two well‐defined peaks (3d5/2 and 3d3/2) at a binding energy of 54.46 and 55.31&nbsp;eV, respectively. These two peaks confirmed the presence of Se<sup>2−</sup> ions in MnSe<sub>2</sub>.<ref>{{cite journal |doi=10.1002/ente.201700097 |title=Hybrid Reduced Graphene Oxide/Manganese Diselenide Cubes: A New Electrode Material for Supercapacitors |year=2017 |last1=Balamuralitharan |first1=B. |last2=Karthick |first2=S. N. |last3=Balasingam |first3=Suresh Kannan |last4=Hemalatha |first4=K. V. |last5=Selvam |first5=Samayanan |last6=Raj |first6=J. Anandha |last7=Prabakar |first7=Kandasamy |last8=Jun |first8=Yongseok |last9=Kim |first9=Hee-Je |journal=Energy Technology |volume=5 |issue=11 |pages=1953–1962 }}</ref>


==References== ==References==
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{{Manganese compounds}} {{Manganese compounds}}
{{Selenides}}


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{{inorganic-compound-stub}} {{inorganic-compound-stub}}
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