| 摘要 |
A crystalline material represented by M12a(M2bLc)M3dOyNx wherein M1 is at least one element selected from alkali metals, M2 is at least one element selected from Ca, Sr, and Ba, M3 is at least one element selected from Si and Ge, L is at least one element selected from rare earth elements, Bi, and Mn, a is 0.9 to 1.5, b is 0.8 to 1.2, c is 0.005 to 0.2, d is 0.8 to 1.2, x is 0.001 to 1.0, and y is 3.0 to 4.0 or less. |
