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