A fluoride ion conductor contains potassium, at least one alkaline earth metal selected from the group consisting of calcium, barium, and strontium, and fluorine. The fluoride ion conductor includes a phase of a compound containing potassium, at least one alkaline earth metal, and fluorine.

A fluoride ion conductor contains potassium, at least one alkaline earth metal selected from the group consisting of calcium, barium, and strontium, and fluorine. The fluoride ion conductor includes a phase of a compound containing potassium, at least one alkaline earth metal, and fluorine.

The present invention relates to a process for producing a composite-fluoride fluorescent material represented by the general formula A.sub.2MF.sub.6:Mn.sup.4+ (wherein A is at least one alkali metal element including K; M is one or more metallic elements including at least Si or Ge and selected from among Si, Ge, Sn, Ti, Zr, and Hf; F is fluorine; and Mn is manganese). With the production process, it is possible to obtain a fluorescent material which is high in absorptance, internal quantum efficiency, and external quantum efficiency and has excellent optical properties.

The present invention relates to a process for producing a composite-fluoride fluorescent material represented by the general formula A.sub.2MF.sub.6:Mn.sup.4+ (wherein A is at least one alkali metal element including K; M is one or more metallic elements including at least Si or Ge and selected from among Si, Ge, Sn, Ti, Zr, and Hf; F is fluorine; and Mn is manganese). With the production process, it is possible to obtain a fluorescent material which is high in absorptance, internal quantum efficiency, and external quantum efficiency and has excellent optical properties.

Some embodiments include a molten salt system comprising a reactor with a salt mixture. In some embodiments, the salt mixture includes uranium and a eutectic salt. The eutectic salt may include one or more of sodium fluoride, potassium fluoride, aluminum fluoride, zirconium fluoride, lithium fluoride, beryllium fluoride, rubidium fluoride, magnesium fluoride, calcium fluoride, sodium chloride, potassium chloride, aluminum chloride, zirconium chloride, lithium chloride, beryllium chloride, rubidium chloride, magnesium chloride, and calcium chloride. The eutectic salt may have a melting point less than about 800 C.

Some embodiments include a molten salt system comprising a reactor with a salt mixture. In some embodiments, the salt mixture includes uranium and a eutectic salt. The eutectic salt may include one or more of sodium fluoride, potassium fluoride, aluminum fluoride, zirconium fluoride, lithium fluoride, beryllium fluoride, rubidium fluoride, magnesium fluoride, calcium fluoride, sodium chloride, potassium chloride, aluminum chloride, zirconium chloride, lithium chloride, beryllium chloride, rubidium chloride, magnesium chloride, and calcium chloride. The eutectic salt may have a melting point less than about 800 C.

Some embodiments include a method comprising: flowing a molten salt out of a molten salt reactor at a first temperature, heating the molten salt reactor to a second temperature above the melding point of the second salt mixture causing the second salt mixture to melt; flowing the second salt mixture out of the molten salt reactor; flowing a third salt mixture into the molten salt reactor; and cooling the molten salt reactor from the second temperature to a third temperature causing the third salt mixture to solidify on the interior surface of the housing. In some embodiments, the molten salt may include a first salt mixture comprising at least uranium. In some embodiments, the first temperature is a temperature above the melting point of the first salt mixture.

A method of performing a plurality of synthesis processes of preparing a radiopharmaceutical in series, which method includes carrying out a first synthesis run comprising the steps of: a) providing water containing 18F; b) trapping the 18F from the water provided in step a) on an anion exchange material; c) eluting the trapped 18F from the anion exchange material to a reaction vessel of first radiopharmaceutical synthesis cassette; d) preparing a radiopharmaceutical incorporating the eluted 18F using the first radiopharmaceutical synthesis cassette; where steps a)-d) are repeated in at least one subsequent run using another radiopharmaceutical synthesis cassette; and where the method includes a reconditioning step of treating the anion exchange material with water between two consecutive runs. Other aspects of the invention relate to a device for performing this method, and a cassette for use in the device.

A method of performing a plurality of synthesis processes of preparing a radiopharmaceutical in series, which method includes carrying out a first synthesis run comprising the steps of: a) providing water containing 18F; b) trapping the 18F from the water provided in step a) on an anion exchange material; c) eluting the trapped 18F from the anion exchange material to a reaction vessel of first radiopharmaceutical synthesis cassette; d) preparing a radiopharmaceutical incorporating the eluted 18F using the first radiopharmaceutical synthesis cassette; where steps a)-d) are repeated in at least one subsequent run using another radiopharmaceutical synthesis cassette; and where the method includes a reconditioning step of treating the anion exchange material with water between two consecutive runs. Other aspects of the invention relate to a device for performing this method, and a cassette for use in the device.

An object of the present invention is to provide a novel substance that has a high reactivity as a fluorinating agent, is effectively used in various fluorination reactions, and is safely handled even in air. As the solution for achieving this object, the present invention provides a complex obtained by reacting bromine trifluoride with at least one metal halide selected from the group consisting of halogenated metals and halogenated hydrogen metals in a nonpolar solvent. This complex serves as a fluorinating agent that provides excellent fluorination performance and that is stable in air.