The Synthesis and Crystal Structure of LaHSe2O6, a Layered, Anhydrous Selenite

Abstract

Lanthanum hydrogen selenite, LaHSe2O6, M, = 393.83, orthorhombic, Pc21b (No. 29), a = 7.139 (6) A, b = 19.008 (9) A, c = 8.469 (9) A, (alph = 90 deg, Beta = 90 deg, gamma = 90 deg, V = 1149.24 A3, Z = 8, Dx = 4.55 g CM- 3, u = 199.7 cm-1, lambda (Mo Ka, graphite monochromator) = 0.71073 A, F(000) = 1392, room temperature 298 (2) K. Final R = 3.61%, wR = 4.21% for 1701 observed reflections with I > 3 sigma(I)). LaHSe2O6 has been prepared using hydrothermal synthetic techniques and its crystal structure elucidated by single crystal X-ray diffraction. This new structure consists of layers of LaOl0, HSeO3 and SeO3 polyhedra parallel to the ac-place; the layers are interconnected by Se-OH ... O-(Se,La) hydrogen bonds.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 15, 1992
Accession Number
ADA251050

Entities

People

  • Anthony K. Cheetham
  • Galen D. Stucky
  • Russell E. Morris
  • William T. Harrison

Organizations

  • University of California, Santa Barbara

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Crystal Structure
  • Crystallography
  • Crystals
  • Diffraction
  • Graphitic Materials
  • Hydrogen
  • Hydrogen Bonds
  • Lanthanum
  • Materials
  • Military Research
  • Reflection
  • Single Crystals
  • Three Dimensional
  • Two Dimensional
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Chemistry
  • Materials science

Readers

  • Analytical Mechanics
  • Materials Science and Engineering.
  • Organic Chemistry