MAGNESIUM FLUORIDE PARTICLES, METHOD FOR PRODUCING MAGNESIUM FLUORIDE PARTICLES, DISPERSION SOLUTION OF MAGNESIUM FLUORIDE PARTICLES, METHOD FOR PRODUCING DISPERSION SOLUTION OF MAGNESIUM FLUORIDE PARTICLES, COMPOSITION FOR FORMING LOW REFRACTIVE INDEX LAYER, METHOD FOR PRODUCING COMPOSITION FOR FORMING A LOW REFRACTIVE INDEX LAYER, SUBSTRATE WITH LOW REFRACTIVE INDEX LAYER, AND METHOD FOR MANUFACTURING SUBSTRATE WITH LOW REFRACTIVE INDEX LAYER

摘要

Magnesium fluoride particles with a low refractive index excellent in film formability are provided. The magnesium fluoride particles each include at least one magnesium fluoride particulate. The at least one magnesium fluoride particulate each has pores that support a supported substance. Further, the at least one magnesium fluoride particulate includes a plurality of particulates. A grain boundary void-like pore serving as a gap that supports the supported substance is present between particulates adjacent to each other of the plurality of particulates.