Abstract: A fluorescent member includes: a wavelength converter including an incidence part on which a light of a light source is incident and an output part from which a converted light subjected to wavelength conversion as a result of excitation by an incident light is output; and a reflecting part provided in at least a portion of a surface of the wavelength converter. The wavelength converter is comprised of a material whereby a degree of scattering of the light of the light source incident via the incidence part and traveling toward the output part is smaller than in the case of a polycrystalline material.

Abstract: In a phosphor according to an aspect, an emission site has a perovskite crystal structure expressed by ABX3, in which A and B are each a cation and X is an anion, and an emission element is located at a B site serving as a body center of the perovskite crystal structure.

Abstract: A method of producing an apatite crystal includes the steps of preparing an apatite single crystal expressed by the general formula M25(PO4)3X (M2 being at least atomic element selected from the group consisting of divalent alkaline-earth metals and Eu, and X is at least one atomic selected from the group consisting of halogens); placing the apatite single crystal into a space controllable to a predetermined atmosphere; supplying water vapor into the space; and heating such that the atmosphere in the space is within a 1000° C. to 1400° C. range.

Abstract: A nanocomposite includes: a matrix phase; and a functional area disposed in the matrix phase. The functional area contains monocrystal fine particles.

Abstract: In a phosphor according to an aspect, an emission site has a perovskite crystal structure expressed by ABX3, in which A and B are each a cation and X is an anion, and an emission element is located at a B site serving as a body center of the perovskite crystal structure.

Abstract: A phosphor is represented by the general formula aMIX·MII1-xMIMVO4:(Re)x where MI is at least one atomic element selected from the group consisting of K, Li, Na, Rb, Cs, Fr, Cu, and Ag, with K being essential; MII is at least one atomic element selected from the group consisting of Mg, Ca, Sr, Ba, Ra, Mn, Zn, Cd, and Sn; MV is at least one atomic element selected from the group consisting of P, V, Nb, Ta, As, Sb, and Bi; X is at least one halogen element, with F being essential; Re is at least one atomic element selected from the group consisting of rare earth elements, with Eu being essential; and a is in the range 0.6?a?1.4.

Abstract: A composite material includes: an apatite crystal in the form of a tube; and a functional component accommodated in the apatite crystal tube and constituted by a material having physical properties different from those of the apatite crystal. The apatite crystal may be a monocrystal given by the general formula M25(PO4)3X, where M2 denotes at least one element selected from the group consisting of divalent alkali earth metals and Eu, and X denotes at least one element or molecule selected from the group consisting of halogens and OH.

Abstract: A nanocomposite includes: a matrix phase; and a functional area disposed in the matrix phase. The functional area contains monocrystal fine particles.

Abstract: A fluorescent member includes: a wavelength converter including an incidence part on which a light of a light source is incident and an output part from which a converted light subjected to wavelength conversion as a result of excitation by an incident light is output; and a reflecting part provided in at least a portion of a surface of the wavelength converter. The wavelength converter is comprised of a material whereby a degree of scattering of the light of the light source incident via the incidence part and traveling toward the output part is smaller than in the case of a polycrystalline material.

Abstract: A lamp includes a plurality of semiconductor light-emitting elements arrayed linearly, an aluminum substrate on which the plurality of light-emitting elements are mounted, and a linear light wavelength conversion member disposed separated from light-emitting surfaces of the plurality of light-emitting elements. The aluminum substrate includes a circuit formed such as to be able to switch on/off the plurality of light-emitting elements, as grouped into a plurality of sets, on a per-set basis in which the sets are composed of either one or a plurality of the light-emitting elements.

Abstract: A method of producing an apatite crystal includes the steps of preparing an apatite single crystal expressed by the general formula M25(PO4)3X (M2 being at least atomic element selected from the group consisting of divalent alkaline-earth metals and Eu, and X is at least one atomic selected from the group consisting of halogens); placing the apatite single crystal into a space controllable to a predetermined atmosphere; supplying water vapor into the space; and heating such that the atmosphere in the space is within a 1000° C. to 1400° C. range.

Abstract: An adsorption method adsorbs a substance by using a tube-shaped apatite crystal. The apatite crystal may be a monocrystal given by a general formula M25(PO4)3X (M2 denotes at least one element selected from the group consisting of divalent alkali earth metal and Eu, and X denotes at least one element or molecule selected from the group consisting of halogen element and OH). The outer form of the apatite crystal may be a hexagonal prism in which the aperture of a hole formed on a top surface or bottom surface of the hexagonal prism may be hexagonal.

Abstract: A lamp includes a plurality of semiconductor light-emitting elements arrayed linearly, an aluminum substrate on which the plurality of light-emitting elements are mounted, and a linear light wavelength conversion member disposed separated from light-emitting surfaces of the plurality of light-emitting elements. The aluminum substrate includes a circuit formed such as to be able to switch on/off the plurality of light-emitting elements, as grouped into a plurality of sets, on a per-set basis in which the sets are composed of either one or a plurality of the light-emitting elements.

Abstract: A phosphor is represented by the general formula aMIX.MII1-xMIMVO4:(Re)x where MI is at least one atomic element selected from the group consisting of K, Li, Na, Rb, Cs, Fr, Cu, and Ag, with K being essential; MII is at least one atomic element selected from the group consisting of Mg, Ca, Sr, Ba, Ra, Mn, Zn, Cd, and Sn; MV is at least one atomic element selected from the group consisting of P, V, Nb, Ta, As, Sb, and Bi; X is at least one halogen element, with F being essential; Re is at least one atomic element selected from the group consisting of rare earth elements, with Eu being essential; and a is in the range 0.6?a?1.4.

Abstract: An apatite crystal is a single crystal expressed by a general formula (M2)5(PO4)3X. In this formula, M2 indicates at least one type of element selected from the group consisting of bivalent alkaline-earth metals and Eu, and X indicates at least one type of element or molecule selected from the group consisting of halogen elements and OH. And the single crystal is of a tubular shape. The outer shape of the apatite may be a hexagonal prism. The shape of an opening of a hole formed in the upper surface or lower surface of the hexagonal prism may be a hexagon.

Abstract: An apatite crystal is a single crystal expressed by a general formula (M2)5(PO4)3X. In this formula, M2 indicates at least one type of element selected from the group consisting of bivalent alkaline-earth metals and Eu, and X indicates at least one type of element or molecule selected from the group consisting of halogen elements and OH. And the single crystal is of a tubular shape. The outer shape of the apatite may be a hexagonal prism. The shape of an opening of a hole formed in the upper surface or lower surface of the hexagonal prism may be a hexagon.

Abstract: A composite material includes: an apatite crystal in the form of a tube; and a functional component accommodated in the apatite crystal tube and constituted by a material having physical properties different from those of the apatite crystal. The apatite crystal may be a monocrystal given by the general formula M25(PO4)3X, where M2 denotes at least one element selected from the group consisting of divalent alkali earth metals and Eu, and X denotes at least one element or molecule selected from the group consisting of halogens and OH.

Abstract: Provided is a light emitting device. A semiconductor light emitting element with a peak wavelength ranging from 395 nm to 410 nm is used as a light source, light scattering particles made of a material with a band gap of 3.4 eV or more are dispersed in a dispersion medium of a reflection member, and a refractive index of the light scattering particles is larger than a refractive index of the dispersion medium by 0.3 or more. The semiconductor light emitting element has a 1 percentile value ranging from 365 nm to 383 nm in emission integrated intensity.

Abstract: An adsorption method adsorbs a substance by using a tube-shaped apatite crystal. The apatite crystal may be a monocrystal given by a general formula M25(PO4)3X (M2 denotes at least one element selected from the group consisting of divalent alkali earth metal and Eu, and X denotes at least one element or molecule selected from the group consisting of halogen element and OH). The outer form of the apatite crystal may be a hexagonal prism in which the aperture of a hole formed on a top surface or bottom surface of the hexagonal prism may be hexagonal.

Abstract: An apatite crystal is a single crystal expressed by a general formula (M2)5(PO4)3X. In this formula, M2 indicates at least one type of element selected from the group consisting of bivalent alkaline-earth metals and Eu, and X indicates at least one type of element or molecule selected from the group consisting of halogen elements and OH. And the single crystal is of a tubular shape. The outer shape of the apatite may be a hexagonal prism. The shape of an opening of a hole formed in the upper surface or lower surface of the hexagonal prism may be a hexagon.