Supertetrahedron phosphor for solid-state lighting

A lighting unit comprising a light source, configured to generate light source light and a luminescent material, configured to convert at least part of the light source light into luminescent material light, wherein the luminescent material comprises a phosphor, wherein this phosphor comprises an alkaline earth aluminum nitride based material having a cubic crystal structure with T5 supertetrahedra, wherein the T5 supertetrahedra comprise at least Al and N, and wherein the alkaline earth aluminum nitride based material further comprises a luminescent lanthanide incorporated therein, wherein the alkaline earth aluminum nitride based material comprises

• [Mm−x−yAa]{GgQqDdN55−n−cRnCc}:ESx,REy
• wherein
• M comprises one or more selected from the group consisting of Ca, Sr, Mg, Ba;
• A comprises one or more selected from the group consisting of Li, Na;
• G comprises one or more selected from the group consisting of Al, Ga, B, wherein G at least comprises Al;
• Q comprises one or more selected from the group consisting of Mg, Mn, Zn;
• D comprises one or more selected from the group consisting of Si, Ge;
• R comprises one or more selected from the group consisting of O, S;
• ES comprises one or more selected from the group consisting of Eu, Yb, Sm;
• RE comprises one or more selected from the group consisting of Ce, Pr, Nd, Sm, Eu (III), Gd, Tb, Dy, Ho, Er, Tm;
• 0<m≦30;
• 0≦x≦2;
• 0≦y≦1;
• 0<x+y≦3;
• 0<g≦39;
• 0≦q≦5;
• 0≦d≦12;
• 0≦n≦5;
• 0≦c≦12 26≦m+a≦30;
• g+q+d=39;
• 2(m+q)+3(y+g)+a+4d=165−n+c.