Patent ID: 7999237

Claim:
A luminescent substance with the general formula XZO 4 X stands for Sc a Y b La c Ce d Pr e Nd f Sm g Eu h Gd i Tb k Dy l Ho m Er n Tm o Yb p Lu q Sb(III) r Bi s Cr t Mn(III) u Fe(III) v [Ba w Fe(II) y Ca z Sn(II) α Sr β Co γ Ni δ Cu ε ] 3/2 [Na η K λ ] 3 [U(IV) μ Pb π Th σ ] 3/4 U(VI) φ/2 and Z stands for Nb za Ta zb V zc P zd [Ti ze Zr zf Sn(IV) zg ] 5/4 W zhs/6 Fe(III) zis/3 and a+b+c+d+e+f+g+h+i+k+l+m+n+o+p+q+r+s+t+u+v+3/2(w+x+y+z+α+β+γ+δ+ε)+3(η+λ)+3/4(μ+π+σ)+φ/2=1, and a, b, c, d, e, f, g, h, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z, α, β, γ, δ, ε, η, λ, μ, π, σ and φ each range from 0 to 1, and za+zb+zc+zd+5/4 (ze+zf+zg)+5/6zh+5/3zi=1, and za, zb, zc, zd, ze, zf, zg, zh and zi each range from 0 to 1, and further wherein m≠0 and/or n≠0 and/or f≠0.