Phosphor and light-emitting device using same

A phosphor in which an element represented by Rδ is solid-solutionized in a phosphor host crystal represented by Mα(L, A)βXγ,

• wherein,
• M is at least one type of element selected from Mg, Ca, Sr, Ba and Zn,
• L is at least one type of element selected from Li, Na and K,
• A is at least one type of element selected from Al, Ga, B, In, Sc, Y, La and Si,
• X is at least one type of element selected from O, N, F and Cl (where all of X being N is excluded),
• R is at least one type of element selected from Mn, Cr, Ti, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho and Yb, and
• α, β, γ and δ satisfy α+β+γ+δ=9,
• 0.00<α≤1.30,
• 3.70≤β≤4.30,
• 3.70≤γ≤4.30, and
• 0.00<δ≤1.30
• wherein the phosphor host crystal is a triclinic type crystal and has space group P-1 symmetry,
• wherein lattice constants a, b and c of the phosphor host crystal are values in ranges:
• a=0.5752±0.05 nm,
• b=0.7341±0.05 nm, and
• c=0.9738±0.05 nm.