The invention relates to the field of inorganic chemistry and presents a new class of acids and their salts, in particular, a class of halogenoid acids with a general formula H.sub.mXO.sub.(V+m-n)/2Ha.sub.n, where X is a non-metal of group 4, 5 or 6 of the periodic table of elements, V is its valence in the compound, Ha is a halogen, which may find application in chemical treatment of materials, as a part of fertilizers or insecticides in agriculture, in medicine, etc. In particular, the object of the invention is a fluoro-nitric acid of the formula H.sub.2NO.sub.3F with the structural formula ##STR00001## In particular, the object of the invention is a chloro-nitric acid of the formula H.sub.2NO.sub.3Cl with the structural formula ##STR00002## In particular, the object of the invention is a sulfuro-chlorous acid of the formula H.sub.2SO.sub.3Cl.sub.2 with the structural formula ##STR00003##

A method for storage and supply of a F3NO-free FNO-containing gas comprises the steps of storing the F3NO-free FNO-containing gas in a NiP coated steel cylinder with a polished inner surface, releasing the F3NO-free FNO-containing gas from the cylinder to a manifold assembly by activating a cylinder valve in fluid communication with the cylinder and the manifold assembly, de-pressurizing the F3NO-free FNO-containing gas by activating a pressure regulator in the manifold assembly so as to divide the manifold assembly into a first pressure zone upstream of the pressure regulator and a second pressure zone downstream of the pressure regulator, and feeding the de-pressurized F3NO-free FNO-containing gas to a target reactor downstream of the second pressure zone.

There is provided a method for producing trifluoroamine oxide. The method includes a step of preparing an intermediate product by simultaneously providing and reacting nitrogen trifluoride and nitrous oxide under the presence of a SbF.sub.5 reaction catalyst; and a step of producing trifluoroamine oxide by reacting the intermediate product with potassium fluoride. The step of reacting the intermediate product with potassium fluoride is performed under atmospheric pressure and room temperature.

The present invention relates to a preparation method of trifluoroamine oxide which comprises the steps of producing an intermediate product by reacting nitrogen trifluoride and nitrous oxide in the presence of a reaction catalyst wherein the unreacted gas containing nitrogen (N.sub.2) produced in the course of the reaction is removed and instead nitrogen trifluoride and nitrous oxide are injected additionally; and producing trifluoroamine oxide by reacting the intermediate product with sodium fluoride.

The present invention relates to a preparation method of trifluoroamine oxide comprising the steps of producing an intermediate product by reacting nitrogen trifluoride and nitrous oxide in the presence of a reaction catalyst; and producing trifluoroamine oxide by reacting the intermediate product with sodium fluoride in vacuum condition up to 100 mmHg.

The present invention relates to a preparation method of trifluoroamine oxide comprising the steps of producing an intermediate product by reacting nitrogen trifluoride and nitrous oxide in the presence of a reaction catalyst; and producing trifluoroamine oxide by reacting the intermediate product with sodium fluoride in vacuum condition up to 100 mmHg.

A positive-electrode active material contains a compound represented by the following composition formula (1):
Li.sub.xMe.sub.yO.sub.X.sub.(1) where Me denotes one or more elements selected from the group consisting of Mn, Ni, Co, Fe, Al, Sn, Cu, Nb, Mo, Bi, Ti, V, Cr, Y, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ag, Ru, Ta, W, La, Ce, Pr, Sm, Eu, Dy, and Er, X denotes two or more elements selected from the group consisting of F, Cl, Br, I, N, and S, and x, y, , and satisfy 0.75x2.25, 0.75y1.50, 1<3, and 0<2, respectively. A crystal structure of the compound belongs to a space group Fm-3m.

A positive-electrode active material contains a compound represented by the following composition formula (1):
Li.sub.xMe.sub.yO.sub.X.sub.(1) where Me denotes one or more elements selected from the group consisting of Mn, Ni, Co, Fe, Al, Sn, Cu, Nb, Mo, Bi, Ti, V, Cr, Y, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ag, Ru, Ta, W, La, Ce, Pr, Sm, Eu, Dy, and Er, X denotes two or more elements selected from the group consisting of F, Cl, Br, I, N, and S, and x, y, , and satisfy 0.75x2.25, 0.75y1.50, 1<3, and 0<2, respectively. A crystal structure of the compound belongs to a space group Fm-3m.

Disclosed are systems and methods for supplying a F.sub.3NO-free FNO-containing gas and systems and methods for etching using the F.sub.3NO-free FNO-containing gas. The system comprises a NiP coated steel cylinder with a polished inner surface to store the F.sub.3NO-free FNO-containing gas, a cylinder valve to release the F.sub.3NO-free FNO-containing gas from the cylinder, a manifold assembly, including a pressure regulator and line components to deliver the F.sub.3NO-free FNO-containing gas to a target reactor. The pressure regulator de-pressurizes the F.sub.3NO-free FNO-containing gas in the manifold assembly thereby dividing the manifold assembly into a first pressure zone upstream of the pressure regulator and a second pressure zone downstream of the pressure regulator. A gaseous composition comprises F.sub.3NO-free FNO gas containing less than approximately 1% F.sub.3NO impurity by volume and an inert gas being capable of suppressing the concentration of F.sub.3NO impurity in the F.sub.3NO-free FNO gas.

Methods for preparing electrolyte salts for alkaline earth metal-ion batteries (e.g., calcium and magnesium ion batteries) are described. The electrolyte salts comprise alkaline earth metal (e.g., Mg or Ca) salts of 3,4-dicyano-2-trifluoromethylimidazole (TDI). The methods comprise contacting TDI with an alkaline earth metal bis(trifluoroacetate) salt in trifluoroacetic acid.