Jump to ContentJump to Main Navigation
Show Summary Details

Zeitschrift für Kristallographie - Crystalline Materials

Editor-in-Chief: Pöttgen, Rainer

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

12 Issues per year


IMPACT FACTOR increased in 2015: 2.560
Rank 8 out of 26 in category Cristallography in the 2015 Thomson Reuters Journal Citation Report/Science Edition

SCImago Journal Rank (SJR) 2015: 0.827
Source Normalized Impact per Paper (SNIP) 2015: 1.198
Impact per Publication (IPP) 2015: 1.834

Online
ISSN
2196-7105
See all formats and pricing
Just Accepted

Issues

The superstructure of the double layer mineral wermlandite [Mg7(Al0.57, Fe0.433+) (OH)18]2+ · [(Ca0.6, Mg0.4) (SO4)2(H2O)12]2−

J. Rius / R. Allmann
Published Online: 2010-08-25 | DOI: https://doi.org/10.1524/zkri.1984.168.1-4.133

Abstract

The structure of wermlandite, [Mg7(Al0.57Fe0.43)2(OH)18]2+ [(Ca0.6, Mg0.4) (SO4)2(H2O)12]2− has been determined and refined to an R value of 7.2% based on 779 symmetry-independent reflections, of which 224 are unobserved (weighted R = 61%). The cell dimensions are a = b = 9.303(3), c = 22.57(1) Å, the space group is P[unk]c1 with Z = 2 and Dx = 1.96 cm−3.

The double layer structure of wermlandite is similar to those of pyroaurite and sjögrenite. In these compounds the excess positive charge in the brucite-like main layer is compensated by additional anions in the interlayers. Main and interlayer are connected by O – H … O hydrogen bonds ⩾ 2.91 Å. The network of hydrogen bonds could be evaluated.

The reflections of type h,k = 3n, l = 2n are especially strong and indicate the existence of an eighteenfold trigonal superstructure. The superstructure was solved using partial Fourier and Patterson syntheses.

About the article

Published Online: 2010-08-25

Published in Print: 1984


Citation Information: Zeitschrift für Kristallographie, ISSN (Online) 0044-2968, ISSN (Print) 1433-7266, DOI: https://doi.org/10.1524/zkri.1984.168.1-4.133. Export Citation

Citing Articles

Here you can find all Crossref-listed publications in which this article is cited. If you would like to receive automatic email messages as soon as this article is cited in other publications, simply activate the “Citation Alert” on the top of this page.

[1]
S. N. Britvin, N. V. Chukanov, G. K. Bekenova, M. A. Yagovkina, A. V. Antonov, A. N. Bogdanova, and N. I. Krasnova
Geology of Ore Deposits, 2008, Volume 50, Number 7, Page 556
[2]
Ian G. Richardson
Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, 2013, Volume 69, Number 2, Page 150
[3]
S. Pitsch, A. Eschenmoser, B. Gedulin, S. Hui, and G. Arrhenius
Origins of Life and Evolution of the Biosphere, 1995, Volume 25, Number 4, Page 297
[4]
Hans Christian Bruun Hansen, Ole Kragholm Borggaard, and Jan Sørensen
Geochimica et Cosmochimica Acta, 1994, Volume 58, Number 12, Page 2599
[5]
K. El Malki, A. de Roy, and J.P. Besse
Nanostructured Materials, 1993, Volume 2, Number 2, Page 169
[6]
A. Ennadi, A. Legrouri, A. De Roy, and J.P. Besse
Journal of Solid State Chemistry, 2000, Volume 152, Number 2, Page 568
[7]
R. Taylor, I.G. Richardson, and R.M.D. Brydson
Cement and Concrete Research, 2010, Volume 40, Number 7, Page 971
[8]
W. Hofmeister and H. Von Platen
Crystallography Reviews, 1992, Volume 3, Number 1, Page 3
[9]
V. A. Drits, T. N. Sokolova, G. V. Sokolova, and V. I. Cherkashin
International Geology Review, 1986, Volume 28, Number 7, Page 815
[10]
Hans Christian Bruun Hansen and Christian Bender Koch
Applied Clay Science, 1995, Volume 10, Number 1-2, Page 5

Comments (0)

Please log in or register to comment.
Log in