Fluorescent material and light-emitting device

A light-emitting device comprising:

• an excitation light source;
• and
• a fluorescent material that emits light by absorbing excitation light emitted from the excitation light source,
• the fluorescent material mainly comprising a compound represented by AB0.5-w-x-y-zCwEuxSmyLnzW0.5O3, where:
• A is one or more elements selected from the group consisting of alkaline earth metals and mainly contains Ca;
• B is one or more elements selected from the group consisting of divalent metals, mainly Mg;
• C is one or more elements selected from the group consisting of alkali metals and mainly contains Li, Na, or Li and Na;
• Ln is one or more elements selected from the group consisting of rare earth elements excluding Eu and Sm;
• and
• w, x, y, and z meet the following conditions:
• 0.05≦w≦0.25;
• 0.05≦x+y≦0.25;
• 0.0≦y≦0.02;
• and
• w=x+y+z.