Phosphors and phosphor-converted LEDs

Compound of formula (1),

• (Ba2-a-b-c-dMaAbREcDd)(Mg1-e-f-g-jM′eA′fRE′gC′j)(Si2-h-iB′hC″i)(O7+m-k-lXkNl) Formula (1)
• where the following applies to the symbols and indices used:
• M is selected from the group consisting of Ca, Sr, Zn or mixtures of these elements;
• A is selected from the group consisting of Na, K, Rb or mixtures of these elements;
• RE is selected from the group consisting of La, Y, Gd or mixtures of these elements;
• D is selected from the group consisting of Eu2+, Mn2+, Yb2+, Sm2+ or mixtures of these elements;
• M′ is selected from the group consisting of Zr, Hf or mixtures of these elements;
• A′ is selected from the group consisting of Li, Na or mixtures of these elements;
• RE′ is selected from the group consisting of Sc, Lu or mixtures of these elements;
• C′ is selected from the group consisting of B, Al, Ga, In or mixtures of these elements;
• B′ is selected from the group consisting of Ge, Sn or mixtures of these elements;
• C″ is selected from the group consisting of B, Al, Ga, In or mixtures of these elements;
• X is selected from the group consisting of F, Cl or mixtures of these elements;
• N is nitrogen;
• 0≤a≤1.0;
• 0≤b≤0.6;
• 0≤c≤0.6;
• 0≤d≤2.0;
• 0≤e≤0.3;
• 0≤f≤0.3;
• 0≤g≤0.3;
• 0≤j≤0.6;
• 0≤h≤1.0;
• 0≤i≤0.6;
• 0≤k≤2.1;
• 0≤l≤2.1;
• and
• −2.0≤m≤2.0;
• with the proviso that b≠0 and/or c≠0 and/or e≠0 and/or g≠0 and/or with the proviso that f≠0 and k≠0 at the same time and/or with the proviso that f≠0 and j and/or i≠0 at the same time.