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Pyroelectric properties of the monoclinic rare earth nitrates A2Ln(NO3)5·4H2O (A = NH4, Rb; Ln = La, Ce)

  • Matthias Ackermann , Lionel Andersen , Petra Becker EMAIL logo and Ladislav Bohatý
Published/Copyright: May 1, 2015
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Zeitschrift für Kristallographie - Crystalline Materials
From the journal Zeitschrift für Kristallographie - Crystalline Materials Volume 230 Issue 11

Abstract

The pyroelectric effect of four isomorphic monoclinic (space group Cc), non-ferroelectric rare earth nitrates A2Ln(NO3)5·4H2O (A = NH4, Rb; Ln = La, Ce) was investigated in the temperature range between 100 K and 300 K, using a home-made continuous-flow cryostat for measurements of pyroelectric currents. The symmetry-allowed temperature-dependent change of orientation of the pyroelectric vector p within the mirror plane is unusually large, showing a rotation of p of 148°, 129°, 36° and 40° for (NH4)2La(NO3)5·4H2O, (NH4)2Ce(NO3)5·4H2O, Rb2La(NO3)5·4H2O and Rb2Ce(NO3)5·4H2O, respectively, while changing the temperature from 100 K to 300 K in each case. The pyroelectric coefficients are up to ten times larger than p3 of tourmaline. In addition, new data of the pyroelectric coefficients of Li2SO4·H2O and BiB3O6 and their temperature dependence are given.

Keywords: pyroelectric effect; rare earth nitrates; Rb2Ln(NO3)5·4H2O; (NH4)2Ln(NO3)5·4H2O; BiB3O6; Li2SO4·H2O

Dedicated to the memory of Siegfried Haussühl who passed away on January 7th, 2014.

Corresponding author: Petra Becker, Institut für Kristallographie, Universität zu Köln, Greinstr. 6, 50939 Köln, Germany, E-mail:

Acknowledgments

The authors thank Professor Dr. H. Pentinghaus for the supply of RbNO3. This work was partly supported by the DFG through SFB 608.

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Received: 2014-12-5
Accepted: 2015-3-15
Published Online: 2015-5-1
Published in Print: 2015-11-1

©2015 by De Gruyter

Articles in the same Issue

  1. Frontmatter
  2. Graphical Synopsis
  3. Preface
  4. Crystal physics in Germany – The lifework of Siegfried Haussühl (*25th November 1927, †07th January 2014)
  5. Original Articles
  6. Pyroelectric properties of the monoclinic rare earth nitrates A2Ln(NO3)5·4H2O (A = NH4, Rb; Ln = La, Ce)
  7. Single crystals of guanidinium zinc sulfate, [C(NH2)3]2Zn(SO4)2 – growth, structure, vibrational spectroscopy and stimulated Raman scattering
  8. 3D printing of representation surfaces from tensor data of KH2PO4 and low-quartz utilizing the WinTensor software
  9. Elastic, thermoelastic and piezoelectric properties of 11 new bis(alkylammonium) and bis(polyalkylammonium) zirconium bis(nitrilotriacetates)
  10. Influence of the Bi 6s2 lone electron pair on elastic properties of monoclinic Bi4B2O9
  11. X-ray topographic study of the antiferroelectric phase transition and antiphase boundaries in copper formate tetrahydrate
https://doi.org/10.1515/zkri-2014-1827
Keywords for this article
pyroelectric effect; rare earth nitrates; Rb2Ln(NO3)5·4H2O; (NH4)2Ln(NO3)5·4H2O; BiB3O6; Li2SO4·H2O

Articles in the same Issue

  1. Frontmatter
  2. Graphical Synopsis
  3. Preface
  4. Crystal physics in Germany – The lifework of Siegfried Haussühl (*25th November 1927, †07th January 2014)
  5. Original Articles
  6. Pyroelectric properties of the monoclinic rare earth nitrates A2Ln(NO3)5·4H2O (A = NH4, Rb; Ln = La, Ce)
  7. Single crystals of guanidinium zinc sulfate, [C(NH2)3]2Zn(SO4)2 – growth, structure, vibrational spectroscopy and stimulated Raman scattering
  8. 3D printing of representation surfaces from tensor data of KH2PO4 and low-quartz utilizing the WinTensor software
  9. Elastic, thermoelastic and piezoelectric properties of 11 new bis(alkylammonium) and bis(polyalkylammonium) zirconium bis(nitrilotriacetates)
  10. Influence of the Bi 6s2 lone electron pair on elastic properties of monoclinic Bi4B2O9
  11. X-ray topographic study of the antiferroelectric phase transition and antiphase boundaries in copper formate tetrahydrate
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