| 四磷酸镧钾的晶体结构 |
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| 引用本文： | 林永华,胡宁海,周清廉,刘书珍.四磷酸镧钾的晶体结构[J].物理学报,1983,32(5):675-680. |
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| 作者姓名： | 林永华 胡宁海 周清廉 刘书珍 |
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| 作者单位： | 中国科学院长春应用化学研究所 |
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| 摘 要： | 四磷酸镧钾(KLaPO3]4)晶体属单斜晶系,空间群为P21。晶胞参数a=8.106(3)?, b=8.551(2)?,c=7.326(3)?,β=92.18(6)°晶胞内分子数z=2。全矩阵最小二乘法修正给出1026个独立反射点的R=0.061,Rw=0.062。基本的结构单元为(PO3)n螺旋带,它们由共角的四面体构成。十二面体LaO8是彼此分立,K原子占据不规则空隙多面体中心。最短的La—La距为7.063?。
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| 收稿时间： | 1982-06-21 |
CRYSTAL STRUCTURE OF POTASSIUM LANTHANUM METAPHOSPHATE |
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| LIN YONG-HUA,HU NING-HAI,ZHOU QING-LIAN and LIU SHU-ZHEN.CRYSTAL STRUCTURE OF POTASSIUM LANTHANUM METAPHOSPHATE[J].Acta Physica Sinica,1983,32(5):675-680. |
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| Authors: | LIN YONG-HUA HU NING-HAI ZHOU QING-LIAN and LIU SHU-ZHEN |
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| Abstract: | The crystal of potassium lanthanum metaphosphate with composition KLaPO3]4 belongs to monoclinic system. The space gr oup is P21 with lattice parameters α= 8.106(3)?, b= 8.551 (2)?, c = 7.326(3)?, β = 92.18(6)°. Two molecules are contained in the unit cell. A fullmatrix, least square refinement gave R=0.061, Rw = 0.062 for 1026 independent reflections. The basic structural units are helical ribbons, (PO3)n, formed by cornersharing tetrahedra of PO4. The LaO8 dodecahedra are isolated without sharing any O atom with each other, and K atom locate on the center of irregular interstitial polyhedra. The shorhest La-La distance is 7.063?.
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