Rare earth doped luminescent material

A luminescent material comprising an aluminate phosphor of formula II:

• (LaMgAl11O19)a(A1+xMg1+yAl10+zO17+x+y+1.5z)1-a:Eu2+, R3+
• wherein 0≦a≦0.3;
• 0≦x≦0.4;
• 0≦y≦1;
• 0≦z≦0.2, and
• wherein A is selected from Ca, Ba, and Sr and combinations thereof;
• and R3+ is a trivalent rare earth ion selected from the group consisting of Sm3+, Yb3+, Tm3+, Ce3+, Tb3+, Pr3+ and combinations thereof.

A lighting apparatus comprising:

• a light source;
• and
• a luminescent material radiationally coupled to the light source, and comprising an aluminate phosphor of formula A1+xMg1+yAl10+zO17+x+y+1.5z:Eu2+, R3+, wherein 0≦x≦0.4, 0≦y≦1 and 0≦z≦0.2;
• and wherein A is selected from Ca, Ba, and Sr and combinations thereof;
• and R3+ is a trivalent rare earth ion selected from the group consisting of Sm3+, Yb3+, Tm3+, Ce3+, Tb3+, Pr3+ and combinations thereof.

A lighting apparatus comprising:

• a light source;
• and
• a luminescent material radiationally coupled to the light source and comprising an aluminate phosphor of formula:
• BaMgAl10O17:Eu2+, Sm3+.

A lighting apparatus comprising:

• a light source;
• and
• a luminescent material radiationally coupled to the light source and comprising an aluminate phosphor of formula:
• BaMgAl10O17:Eu2+, Pr3+.

A lighting apparatus comprising:

• a light source;
• and
• a luminescent material radiationally coupled to the light source and comprising an aluminate phosphor of formula:
• BaMgAl10O17:Eu2+, Mn2+, Sm3+.

A lighting apparatus comprising:

• a light source;
• and
• a luminescent material radiationally coupled to the light source and comprising an aluminate phosphor of formula:
• BaMgAl10O17:Eu2+, Mn2+, Pr3+.