Fluoride phosphor, method for manufacturing fluoride phosphor, and light-emitting device

A method for manufacturing a fluoride phosphor, the method comprising:

• providing first fluoride particles having a composition containing an element M, an alkali metal, manganese, and a fluorine atom, wherein the element M comprises at least one selected from the group consisting of Group 4 elements, Group 13 elements, and Group 14 elements, and wherein when a number of moles of the alkali metal is 2, a number of moles of manganese is more than 0 and less than 0.2, a number of moles of the element M is more than 0.8 and less than 1, and a number of moles of the fluorine atom is more than 5 and less than 7;
• and
• bringing the first fluoride particles, phosphate ions, and at least one metal ion containing at least one element selected from the group consisting of magnesium, calcium, strontium, and zinc, into contact with each other in a liquid medium containing the first fluoride particles to obtain second fluoride particles in which a phosphate is adhered to the first fluoride particles.