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Zeitschrift für Kristallographie - Crystalline Materials

Editor-in-Chief: Pöttgen, Rainer

Ed. by Antipov, Evgeny / Bismayer, Ulrich / Boldyreva, Elena V. / Friese, Karen / Huppertz, Hubert / Tiekink, E. R. T.

12 Issues per year

IMPACT FACTOR 2016: 3.179

CiteScore 2017: 2.65

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Volume 216, Issue 4


Na4Ge7O16·6H2O and Na2.6Rb0.8H0.6Ge7O16·6H2O refined from powder synchrotron X-ray diffraction data

M. A. Roberts / A. N. Fitch
Published Online: 2009-09-25 | DOI: https://doi.org/10.1524/zkri.


Stirring the microporous germanate Ag4Ge7O16·6H2O in aqueous sodium chloride solution leads to a fully-ion-exchanged product Na4Ge7O16·6H2O, space group R3m, Z = 1 with a = 7.759(3) Å, α = 89.08(2)°, V = 466.9 Å3. Similar treatment of Rb3HGe7O16·3H2O yields a partially-ion-exchanged material, Na4-x-yRbxHyGe7O16·nH2O, (x = 0.80(4), y ≈ 0.6, n ≈ 6), with a = 7.759(5) Å, α = 89.53(4)°, V = 467.0 Å3. The disordered structures have been refined using the Rietveld method from powder synchrotron X-ray diffraction data. The relationship between the structures of the two materials is discussed.

About the article

Published Online: 2009-09-25

Published in Print: 2001-04-01

Citation Information: Zeitschrift für Kristallographie - Crystalline Materials, Volume 216, Issue 4, Pages 225–229, ISSN (Online) 2196-7105, ISSN (Print) 2194-4946, DOI: https://doi.org/10.1524/zkri.

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