| Eu~(3+)激活的La_2Na_2Sr_6(PO_4)_6Br_2和Y_2Na_2Ca_6(PO_4)_6F_2晶体中的发光中心 |
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| 引用本文： | 宋家庆,黄竹坡.Eu~(3+)激活的La_2Na_2Sr_6(PO_4)_6Br_2和Y_2Na_2Ca_6(PO_4)_6F_2晶体中的发光中心[J].北京大学学报(自然科学版),1993(4). |
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| 作者姓名： | 宋家庆 黄竹坡 |
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| 作者单位： | 北京大学化学系
(宋家庆)，北京大学化学系(黄竹坡) |
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| 摘 要： | 采用高温固相法合成了La_2Na_2Sr_6(PO_4)_6Br_2和Y_2Na_2Ca_6(PO_4)_6F_2。X射线衍射分析证明它们都为单一物相。用Sr_(10)(PO_4)_6Br_2和Ca_(10)(PO_4)_6F_2同晶指标化法进行指标化,结果表明:它们都属六方晶系的磷灰石结构,空间群为P6_3/m。计算了它们的晶胞参数。以Eu~(3+)做结构探针,研究了Eu~(3+)所处晶格的点对称性。研究表明:在La_2Na_2Sr_6(PO_4)_6Br_2中Eu~(3+)占据4f格位,为C_3点群,而在Y_2Na_2Ca_6(PO_4)_6F_2中Eu~(3+)处于6h格位,为C_6点群。
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| 关 键 词： | 发光中心 镧 钇 铕 碱土金属 卤磷酸盐 |
Luminescent Center in Eu~(3+)-Activated La_2Na_2Sr_6(PO_4)_6Br_2 and Y_2Na_2Ca_6(PO_4)_6F_2 Crystals |
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| SONG Jiaqing,HUANG Zhu po.Luminescent Center in Eu~(3+)-Activated La_2Na_2Sr_6(PO_4)_6Br_2 and Y_2Na_2Ca_6(PO_4)_6F_2 Crystals[J].Acta Scientiarum Naturalium Universitatis Pekinensis,1993(4). |
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| Authors: | SONG Jiaqing HUANG Zhu po |
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| Abstract: | La,Na2Sr6(PO4)6Br2:Eu3+ and Y2Na2Ca0(PO4)6F2:Eu3+ were synthesized by solid state reactions at high temperature. The crystalline structure of undoped matrix compounds have been determined by indexing lattice planes with analogous crystals of apatite type with space group P63/m.Eu3+ ions were determined by the luminescent probe method. to be located on 4f site of C3 point symmetry in La2Na2Sr4(P04),Br2 and on 6h site of C8 point symmetry in Y2Na2Ca6(PO4)6(PO4)6F2. |
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| Keywords: | Luminescent center Lanthanum Yttrium Europium Alkali-earth Halophosphate |
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