ChemInform Abstract: Study of the Layered Magnetoresistive Perovskite La1.2Sr1.8Mn2O7 by High-Resolution Electron Microscopy and Synchrotron X-Ray Powder Diffraction.

ChemInform ◽  
2010 ◽  
Vol 28 (45) ◽  
pp. no-no
Author(s):  
R. SESHADRI ◽  
M. HERVIEU ◽  
C. MARTIN ◽  
A. MAIGNAN ◽  
B. DOMENGES ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Powder Diffraction ◽  
High Resolution Electron Microscopy ◽  
X Ray ◽  
Resolution Electron

scholarly journals High Resolution Electron Microscopy and X-Ray Powder Diffraction Studies of Sr2Nb5O9.

1990 ◽  
Vol 44 ◽  
pp. 222-227 ◽  
Author(s):  
Gunnar Svensson ◽  
Josephine Bahr ◽  
Björn Lüning ◽  
David T. Beattie ◽  
Povl Krogsgaard-Larsen ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Powder Diffraction ◽  
High Resolution Electron Microscopy ◽  
X Ray ◽  
Resolution Electron

Structure of Nd10W22O81 from high-resolution electron microscopy and X-ray powder diffraction

2001 ◽  
Vol 57 (1) ◽  
pp. 13-19 ◽  
Author(s):  
Carl Grenthe ◽  
Antonietta Guagliardi ◽  
Margareta Sundberg ◽  
Per-Erik Werner
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Powder Diffraction ◽  
High Resolution Electron Microscopy ◽  
X Ray ◽  
Transmission Electron ◽  
Resolution Electron ◽  
Cell Dimensions ◽  
New Type ◽  
Unit Cell Dimensions

The crystal structure of Nd10W22O81, neodymium tungstate, has been determined using a combination of high-resolution transmission electron microscopy and X-ray powder diffraction methods. The unit-cell dimensions determined from X-ray data are a  =  3.8613 (1), b  =  35.9431 (1), c  =  21.8900 (1) Å, V = 3038.05 Å3, Z  =  2, space group Pbcm. The structure is built up of pentagonal columns (PCs) connected to ReO3-type fragments consisting of three octahedra, thus forming W9O32 units. These units form `pillars' along a. These `pillars' are joined by pairs of tilted octahedra (W2O11 groups) to form corrugated layers perpendicular to b. The Nd atoms are located in the space between these layers and form the only link between them. Interstitial O atoms are located between two of the Nd atoms. The formula Nd10W22O81 can thus be alternatively given as Nd5W11O39 + x (x ≃ 1.5), where x represents the interstitial O atoms. Nd10W22O81 is a new type of PC structure.

Sign in / Sign up

Export Citation Format

Share Document