Acta Crystallographica

A magnesium deuteride preparation of composition Mg(D0.gH0.1) 2 is found to be tetragonal with a=4.5025, c=3.0123/~.

W. H. Zachariasen

C. E. Holley

J. F. Stamper

Neutron diffraction study of magnesium deuteride

镁氘化物的中子衍射研究

A. Oberlin

<i>Electron microscopy of thin crystals</i>by P. B. Hirsch, A. Howie, R. B. Nicholson, D. W. Pashley and M. J. Whelan

《薄晶体的电子显微镜观察》作者：P. B. 赫希、A. 霍伊、R. B. 尼科尔森、D. W. 帕什利和M. J. 惠兰

The structures of K3Sb5O14 and K2Sb4O11 have been solved by the single-crystal X-ray direct method and the heavy-atom method, respectively. The structure of K3Sb5O14 is orthorhombic, with space group Pbam and cell parameters a = 24.247 (4), b = 7.157 (2), c = 7.334 (2) A, Z = 4. The structure of K2Sb4O11 is monoclinic, with space group C2/m and cell parameters a = 19.473 (4), b = 7.542 (1), c = 7.198 (1) A, beta = 94.82 (2) deg, Z = 4. A full-matrix least-squares refinement gave R = 0.072 and R = 0.067, respectively. In both structures, oxygen atoms form an octahedron around each Sb atom and an irregular polyhedron around each K atom. By sharing corners and edges, the octahedra form a skeleton network having intersecting b-axis and c-axis tunnels. The K(+) ions, which have more than ten oxygen near neighbors, are located in these tunnels. Evidence for K(+)-ion transport within and between tunnels comes from ion exchange of the alkali ions in molten salts and anisotropic temperature factors that are anomalously large in the direction of the tunnels.

H. Y.-P. Hong

The two-dimensional tunnel structures of K3Sb5O14 and K2Sb4O11

K3Sb5O14和K2Sb4O11的二维隧道结构

The difference electron density has been evaluated for potassium tetrachloropalladate, K2PdC14, using synchrotron radiation at 0.7 and 0 . 9 ~ at room temperature. A similar data set was measured with Mo Ka radiation. The Ap maps for the synchrotron data sets are consistent, and agree approximately with the Mo Ka map away from the Pd nucleus. There is marked depletion of electrons near the Pd core, and substantial movement of electron density near the structural cavities. The Pd-atom charge is approximately + 2, but the K-atom charge is significantly negative. These charges result from transfer of electron density from tightly packed to more open regions of the structure, and do not necessarily reflect atomic electronegativities. K2PdCI4, P4/mmm, Z = 1, /z0.7 = 4.1784, /Zo.9 = 8.6075 m m i, F(000) = 152, T= 293 K, Mr=326.4, a=7.0750(5) , c = 4.1158 (5) ~, V = 206.02 (4) .~3, D,. = 2.631 Mg m-3

J.R. Hester

E.N. Maslen

Nick Spadaccini

N. Ishizawa

Y. Satow

Electron Density in Potassium Tetrachloropalladate (K2PdCl4) From Synchrotron Radiation

基于同步辐射的四氯钯酸钾（K2PdCl4）中的电子密度研究

同步辐射测定四氯钯酸钾(K2PdCl4)中的电子密度

Publication Information	Publisher: Wiley-Blackwell Publishing Ltd，Publishing cycle: ，Journal Type: journal，Open Access Journals: No
Basic data	Year of publication: 1981，Proportion of original research papers: ，Self Citation Rate:， Gold OA Rate:

Acta Crystallographica

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Neutron diffraction study of magnesium deuteride

Electron microscopy of thin crystalsby P. B. Hirsch, A. Howie, R. B. Nicholson, D. W. Pashley and M. J. Whelan

The two-dimensional tunnel structures of K3Sb5O14 and K2Sb4O11

Electron Density in Potassium Tetrachloropalladate (K2PdCl4) From Synchrotron Radiation

The two-dimensional tunnel structures of K3Sb5O14 and K2Sb4O11

Electron Density in Potassium Tetrachloropalladate (K2PdCl4) From Synchrotron Radiation

Electron Density in Potassium Tetrachloropalladate (K2PdCl4) From Synchrotron Radiation

Electron Density in Potassium Tetrachloropalladate (K2PdCl4) From Synchrotron Radiation

Electron Density in Potassium Tetrachloropalladate (K2PdCl4) From Synchrotron Radiation

Electron Density in Potassium Tetrachloropalladate (K2PdCl4) From Synchrotron Radiation