Jump to ContentJump to Main Navigation
Show Summary Details
More options …

Zeitschrift für Naturforschung B

A Journal of Chemical Sciences


IMPACT FACTOR 2017: 0.757

CiteScore 2017: 0.68

SCImago Journal Rank (SJR) 2017: 0.277
Source Normalized Impact per Paper (SNIP) 2017: 0.394

Online
ISSN
1865-7117
See all formats and pricing
More options …
Volume 51, Issue 5

Issues

Preparation, Crystal Structure, and Properties of the Lanthanoid Carbides Ln4C7 with Ln = Ho, Er, Tm, and Lu

Ralf Czekalla
  • Anorganisch-Chemisches Institut der Universität Münster, Wilhelm-Klemm-Straße 8, D-48149 Münster, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Wolfgang Jeitschko
  • Anorganisch-Chemisches Institut der Universität Münster, Wilhelm-Klemm-Straße 8, D-48149 Münster, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Rolf-Dieter Hoffmann
  • Anorganisch-Chemisches Institut der Universität Münster, Wilhelm-Klemm-Straße 8, D-48149 Münster, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Helmut Rabeneck
  • Anorganisch-Chemisches Institut der Universität Münster, Wilhelm-Klemm-Straße 8, D-48149 Münster, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2014-06-02 | DOI: https://doi.org/10.1515/znb-1996-0505

The isotypic carbides Ln4C7 (Ln = Ho, Er, Tm, Lu) were prepared by arc-melting of the elemental components, followed by annealing at 1300 °C. The positions of the metal and of some carbon atoms of the monoclinic crystal structure of LU4C7 were determined from X-ray powder data, and the last carbon positions were found and refined from neutron powder diffraction data: P21/c, a = 360.4(1), b = 1351.4(3), c = 629.0(2) pm, β = 104.97(2)°, Z = 2, R = 0.026 for 429 structure factors and 15 positional parameters. The structure contains isolated carbon atoms with octahedral lutetium coordination and linear C3-units, with C-C bond lengths of 132(1) and 135(1) pm. This carbide may therefore be considered as derived from methane and propadiene. The hydrolysis of LU4C7 with distilled water yields mainly methane and propine, while the hydrolyses of the corresponding holmium and erbium carbides resulted in relatively large amounts of saturated and unsaturated C2-hydrocarbons in addition to the expected products methane and propine. The structure comprises two-dimensionally infinite NaCl-type building elements, which are separated by the C3-units. It may be described as a stacking variant of a previously reported structure of HO4C7, now designated as the a-modification. The Lu4C7-type β -modification was obtained at higher temperatures. Its structure was refined by the Rietveld method from X-ray powder data to a residual R = 0.037 for 320 F values and 15 positional parameters. Lu4C7 is Pauli paramagnetic; β -HO4C7 and Er4C7 show Curie-Weiss behavior with magnetic ordering temperatures of less than 20 K.

: Binary Lanthanoid Carbides; Magnetic Properties; Hydrolyses of Carbides; Crystal Structure

About the article

Received: 1995-08-28

Published Online: 2014-06-02

Published in Print: 1996-05-01


Citation Information: Zeitschrift für Naturforschung B, Volume 51, Issue 5, Pages 646–654, ISSN (Online) 1865-7117, ISSN (Print) 0932-0776, DOI: https://doi.org/10.1515/znb-1996-0505.

Export Citation

© 1946 – 2014: Verlag der Zeitschrift für Naturforschung. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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]
R. CZEKALLA, W. JEITSCHKO, R.-D. HOFFMANN, and H. RABENECK
ChemInform, 2010, Volume 27, Number 35, Page no
[2]
Trevor V. Blankenship, Adrian Lita, and Susan E. Latturner
Inorganic Chemistry, 2012, Volume 51, Number 24, Page 13345
[3]
Trevor V. Blankenship, Matthew J. Dickman, Lambertus J. van de Burgt, and Susan E. Latturner
Inorganic Chemistry, 2015, Volume 54, Number 3, Page 914
[4]
Ralf Czekalla, Thomas Hüfken, Wolfgang Jeitschko, Rolf-Dieter Hoffmann, and Rainer Pöttgen
Journal of Solid State Chemistry, 1997, Volume 132, Number 2, Page 294
[5]
David A. Lang, Julia V. Zaikina, Derek D. Lovingood, Thomas E. Gedris, and Susan E. Latturner
Journal of the American Chemical Society, 2010, Volume 132, Number 49, Page 17523

Comments (0)

Please log in or register to comment.
Log in