The phosphor 9, wherein the element M is at least one kind of {TAIL ~ element} selected from the group consisting of Mg, Ca, {HEAD ~ Sr}, Ba, and Zn, the element 
The phosphor 9 , wherein the element M is at least one kind of { TAIL ~ element } selected from the group consisting of Mg , Ca , { HEAD ~ Sr } , Ba , and Zn , the element
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH