Fluorophor and light-emitting device

The invention provides a fluorophor. The fluorophor contains a composition shown in the following formula (I), namely CapSrqMm-Aa-Bb-Ot-Nn:Zr (I), wherein M is selected from a group consisting of magnesium, barium, beryllium and zinc; A is selected from a group consisting of aluminum, gallium, indium, scandium, yttrium, lanthanum, gadolinium and lutetium; B is selected from a group consisting of silicon, germanium, tin, titanium, zirconium and hafnium; a Z element is selected from a group consisting of europium and cerium; p is larger than 0 and less than 1, q is larger than 0 and less than 1, m is larger than or equal to 0 and less than 1, t is more than or equal to 0 and less than or equal to 0.3, r is larger than or equal to 0.00001 and less than or equal to 0.1, a is equal to 1, b is larger than or equal to 0.8 and less than or equal to 1.2, and n is larger than or equal to 2.7 and less than or equal to 3.1; and the normalized dissolving-out content of strontium in the fluorophor is 1-20ppm, and the fluor