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用热压和无压烧结工艺，在1700～1800℃制备了含氮稀土黄长石固溶体R_2Si_（3-x）Al_xO（3+x）N（4-x）（R＝Nd、Sm，x＝0、0．3、0．6、1．0、1．2；R＝Dy、Y，x＝0、0．3、0．6、1．0；R＝Yb，x=0、0．3）．利用Guinier-Hgg照相法，光密度计LS－18和相应的程序系统（SCAN，SCANPI和PIRUM）给出了稀土黄长石的X射线衍射图谱，精密测定了具有不同稀土元素和固溶量的黄长石固溶体的晶胞参数，并建立了Nd-，Sm-，Y-黄长石固溶体晶胞参数与Al实际固溶量x的关系式．晶胞参数的测定结果表明，具有相同x值的不同黄长石固溶体的晶胞大小随稀土离子半径的减小而变小，而同一稀土元素形成的黄长石固溶体的晶胞参数则随x值的增加而变大．
The solid solution R 2 Si 3-x Al x O 3 + x N 4-x (R = Nd, Sm, x = 0) was synthesized at 1700-1800 ℃ by hot pressing and pressureless sintering. R = Dy, Y, x = 0, 0.3, 0.6, 1.0; R = Yb, x = 0, 0.3) . X-ray diffraction patterns of rare earth yellow feldspar were given by Guinier-Hgg photogrammetry, densitometer LS-18 and corresponding program systems (SCAN, SCANPI and PIRUM), and the yellowish feldspar solid solution with different rare earth elements and solid solution , And established the relationship between the unit cell parameters of solid solution of Nd-, Sm- and Y- The results of unit cell parameters show that the unit cell size of different yellow feldspar solid solutions with the same x value decreases with the decrease of the radius of rare earth ions and the unit cell parameters of the yellow solid solution with the same rare earth element increase with the increase of x Bigger.