Category: 13940-83-5

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Wujiyan Gongye called Preparation of high-purity nickel compound from Ni-containing waste materials, Author is Gu, Heng; Li, Xingying; Zhu, Jianchun; Zhou, Jinyun, which mentions a compound: 13940-83-5, SMILESS is [H]O[H].[H]O[H].[H]O[H].[H]O[H].[Ni+2].[F-].[F-], Molecular F2H8NiO4, COA of Formula: F2H8NiO4.

The process conditions for the preparation of high-purity Ni compounds (NiSO4.6H2O, NiF2.4H2O, Ni(Ac)2.4H2O, and NiO) from Ni-containing waste carbonate by H2SO4 leaching were studied, and a technol. process was proposed. The principle for the purification and extraction of Ni solution in the system of H2SO4 was discussed with phase diagram. The recovery of Ni was 92%, and the quality of the product met the national standard

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Joergensen, Christian K. published the article 《Photoelectron spectrometry of inorganic solid》. Keywords: photoelectron spectrometry inorganic solid; Hartree potentials photoelectron spectrometry; Madelung potential ionic compound.They researched the compound: Nickel(ii)fluoridetetrahydrate( cas:13940-83-5 ).Application of 13940-83-5. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:13940-83-5) here.

A discussion ia given of the highly different probability of ionization of each shell of a given element by x-ray photons. The chem. shift of ionization energies I indicate differing Hartree potentials. The multiple I of an inner shell in systems having pos. spin quantum number S were studied in 11 high-spin Ni(II) compounds Scotch tape was used as internal standard The Madelung potential in almost ionic compounds and the relation between optical electronegativities and I of valence electrons are treated.

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Quality Control of Nickel(ii)fluoridetetrahydrate. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about Mechanism of film formation on nickel anodes in a molten NH4F.2HF. Author is Tasaka, A.; Tsukuda, Y.; Yamada, S.; Matsushita, K.; Kohmura, A.; Muramatsu, N.; Takebayashi, H.; Mimaki, T..

The mechanism of film formation on the Ni anode in a well dehydrated melt of NH4F.2HF was studied at 1000C. The potentiodynamic and potentiostatic polarization behaviors of the Ni anode were studied to elucidate the anodic processes. The oxidized layer was composed of NiF2 with a small amount of nickel oxides such as NiO and Ni2O3 or oxyfluorides having plural oxidation states and a highly oxidized nickel fluoride formed on the Ni anode polarized at potentials >4.5 V vs. H2 and it grew thicker through the repetition of the alternate formation and degradation with the time of electrolysis. The composition and the thickness of the oxidized layer may reflect on the c.d. on the nickel anode under polarization.

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In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Thermal investigation of metal fluoroberyllate hydrates and metal fluoride hydrates, published in 1981-08-16, which mentions a compound: 13940-83-5, Name is Nickel(ii)fluoridetetrahydrate, Molecular F2H8NiO4, Electric Literature of F2H8NiO4.

The thermal decompositions of MBeF4.xH2O and MF2.xH2O, where M = Ni(II), Co(II) or Cu(II) and x = 0-6, were carried out using a MOM derivatograph. Dehydration takes place in multiple steps. Anhydrous fluoroberyllates dissociate first to MF2 and BeF2 and then decompose to MO and BeO in 2 steps. Metal fluorides give ultimately oxyfluoride in one step. None of the intermediate hydrates is thermally stable, except CuF2.2H2O. The probable mechanisms of thermal decomposition are reported. Pyrolyzed products were characterized by elemental anal. and x-ray powder patterns. The enthalpy change is reported for each decomposition step.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Ternary fluorides. I. Structure, magnetism, and reflection spectra of alkali, ammonium, and thallium nickel(II) fluorides》. Authors are Ruedorff, Walter; Kaendler, Joachim; Babel, Dietrich.The article about the compound:Nickel(ii)fluoridetetrahydratecas:13940-83-5,SMILESS:[H]O[H].[H]O[H].[H]O[H].[H]O[H].[Ni+2].[F-].[F-]).Formula: F2H8NiO4. Through the article, more information about this compound (cas:13940-83-5) is conveyed.

By heating stoichiometric mixtures of the anhydrous component fluorides or H fluorides, the ternary compounds M2NiF4 (M = Li, Rb, NH4, or Tl) and MNiF3, (M = Na, Rb, or NH4) were prepared Li2NiF4 has an inverted spinel structure, space group O7h, a 8.313 A., Z = 8, d21 3.47. The other M2NiF4 compounds have a tetragonal, K2MgF4-type lattice, space group D174h, with a and c 4.006 and 13.076; 4.087 and 13.71; 4.084 and 13.79; and 4.051 and 14.22 A. for M = K, Rb, NH4, and Tl, resp. For the K, NH4, and Tl compounds d22 = 4.38, 2.39, and 7.85, resp. NaNiF3 has a rhombic, distorted, perovskite lattice, space group D162h, a 5.360, b 5.525, c 7.705 A., Z = 4, d. 4.04. RbNiF3 has a hexagonal, BaTiO3-type, perovskite lattice, space group D46h, a 5.843, c 14.31 A., d22 4.74. NH4NiF3 is pseudocubic, a 8.145 A., d21 3.26. KNiF3 is cubic, space group O1h, a 4.011 A. The lattice constant of the mixed crystals (KNiF3-KF) formed by mixing boiling NiCl2 and KCl solutions increases with KF content. The mixed crystals are a subtraction phase with vacancies in the Ni++ and F- partial lattices. From magnetic susceptibility data (77-473°K.) the compounds are divided into 3 groups: Li2NiF4, NiF2.4H2O, and (NH4)2NiF4.2H2O, which follow the Curie-Weiss law with low values of θ and which show the normal paramagnetism of Ni++ ion; antiferromagnetic compounds KNiF3, K2NiF4, Rb2NiF4, (NH4)2NiF4, and Tl2NiF4; and NaNiF3, NH4NiF3, and RbNiF3, which at low temperatures are weakly ferro- or ferrimagnetic. The different magnetic behaviors are discussed in relation to the structures, Ni-F-Ni angles, and Ni-F distances in the lattices. Reflection spectra of NiF2, KNiF3, K2NiF4, NaNiF3, Rb2NiF4, and Li2NiF4 are discussed and the absorption bands correlated with transitions among the energy levels of the Ni++ ion.

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So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Chang, Qing; Luo, Zeshunji; Fu, Licai; Zhu, Jiajun; Yang, Wulin; Li, Deyi; Zhou, Lingping researched the compound: Nickel(ii)fluoridetetrahydrate( cas:13940-83-5 ).Safety of Nickel(ii)fluoridetetrahydrate.They published the article 《A new cathode material of NiF2 for thermal batteries with high specific power》 about this compound( cas:13940-83-5 ) in Electrochimica Acta. Keywords: cathode nickel fluoride thermal battery. We’ll tell you more about this compound (cas:13940-83-5).

Transition metal halides, especially fluorides, are promising candidates used as cathode materials for primary batteries, thanks to their attractive electrochem. properties such as high conversion potential as well as extraordinary specific capacity. The intrinsic thermal stability stemming from the characteristic ionic bond, M-F, also enables them to be applied in some severe conditions. Herein, the authors study the discharge performance of NiF2 under large c.d. (0.1 A cm-2, 0.2 A cm-2 and 0.5 A cm-2), together with extremely high temperature of 520°, 550° and 580°. It can exhibit excellent electrochem. properties with the maximum specific power up to 16.2 kW kg-1 at c.d. of 0.5 A cm-2 and temperature of 550°, at cutoff voltage of 2 V (80% of the peak voltage). When the c.d. is controlled at 0.1 A cm-2, the specific power can also reach at 3.5 kW kg-1 with other parameters as the same. Afterwards, XRD and XPS are conducted to further evidence the discharge mechanism of this process, confirming it as NiF2 + 2Li → Ni + 2LiF. Based on them, probably this work will afford insights into alternatives of cathode materials in the area of high specific power thermal batteries.

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SDS of cas: 13940-83-5. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about Bending modes of the water molecules and the M-O stretching modes in the series MF2.4H2O (M = iron, cobalt, nickel, zinc).

The IR spectra of MF2.4X2O (M = Fe, Co, Ni, Zn; X = H, D) are reported in the frequency ranges of the bending vibrations of the H2O mols. (ν2) at 296 and ∼100 K and the M-O lattice vibrations (νM-O) at 296 K. Four νM-O vibrations consisting of 2 doublets are identified using D substitution. The various νZn-O vibrations correlate with the metal-O distances R(Zn-O), and this correlation is further used to calculate R(M-O)’s of the remainder of the series and to refine R(Zn-O). Four ν2(H2O, HDO, D2O) vibrations, consisting of 2 sharp overlapping bands flanked by 2 broad shoulders, are identified. The number of ν2(H2O) components, the sequence of ν2 in the series and the correlation with R(M-O) suggest that the ν2 frequencies are mainly determined by R(M-O). Using this assignment the 2 types of ν2 bands are assigned to the 2 types of crystallog. distinct H2O mols. found in the MF2.4H2O structure.

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In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Binder properties of the metal fluoride-hydrogen fluoride-water system, published in 1973, which mentions a compound: 13940-83-5, Name is Nickel(ii)fluoridetetrahydrate, Molecular F2H8NiO4, Recommanded Product: 13940-83-5.

The binding properties of the MFm-HF-H2O system were investigated, where M is Na, K, Mg, Co, Ni, or Zr and m an integer. The systems KF-HF-H2O and ZrF4-HF-H2O had the highest yield strength, showing promising tech. utilization.

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Formula: F2H8NiO4. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about Crystal structure of μ3-fluoro-tri-μ2-fluoro-tris(tetramethylethylene-diamine nickel(II)) fluoride trihydrate, [Ni3(tmen)3F5]+·F-·3H2O, C18H54F6N6Ni3O3. Author is Ishikawa, Yuki; Miyamoto, Keiko; Horn, Ernst.

The crystal structure of the title compound is herein given. The title compound was synthesized by a reaction of nickel difluoride tetrahydrate and N,N,N’,N’-tetramethylethylenediamine. The title compound is a fluoride bridged trinuclear complex. Crystallog. data are given.

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So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Tasaka, Akimasa; Osada, Toshinori; Kawagoe, Tomoo; Kobayashi, Megumi; Takamuku, Atsushi; Ozasa, Kohtaro; Yachi, Tomonori; Ichitani, Toshiyuki; Morikawa, Katsuhiko researched the compound: Nickel(ii)fluoridetetrahydrate( cas:13940-83-5 ).Reference of Nickel(ii)fluoridetetrahydrate.They published the article 《Effect of metal fluorides in the electrolyte on the electrolytic production of NF3》 about this compound( cas:13940-83-5 ) in Journal of Fluorine Chemistry. Keywords: nitrogen trifluoride electrolytic production fluoride effect. We’ll tell you more about this compound (cas:13940-83-5).

Electrolysis of the melts of NH4F·2HF with and without metal fluorides such as LiF, NaF, KF, CsF, MgF2, and AlF3 was conducted with a nickel anode. The mixed gas composed of NF3 and N2 with a small amount of N2F4, N2F2, N2O, and O2 was liberated at the anode by electrolysis at 25 mA/cm2 and at 120°. The addition of LiF into the melt was most effective for increasing the NF3 current efficiency and for minimizing the consumption of nickel anode. In contrast, KF in the melt decreased the current efficiency for NF3 and other constituents in the anode gas as well as hydrogen generated at the cathode. It also stimulated the consumption of Ni anode. The concentration of nickel ion in the molten KF-NH4F-HF system was low compared with that in the melts of NH4F·2HF with and without alkali metal fluorides such as LiF and CsF because KNiF3 was deposited on the cathode and the cell bottom. The SEM observation and the XPS and XRD analyses revealed that the oxidized layer formed on nickel in molten NH4F·2HF with and without LiF, CsF, and 0.3 mol% NaF was composed of NiF2 with a small amount of Ni oxides of divalent and trivalent states and highly oxidized nickel fluorides. The surface layer formed on nickel in molten NH4F·2HF with 6.7 mol% NaF was mainly composed of NiF2 and NaNiF3. On the other hand, the oxidized layer in the melt containing KF was composed of only KNiF3, and was very brittle. Therefore, it is concluded that KF is detrimental to the nickel anode, depending on the composition of molten fluoride.

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