Abstract
Angle-dependent Mössbauer investigation on single crystals of barium nitroprosside (BNP) using a-, b- and c-crystal cuts has been performed. The EFG tensor has been fully determined by the orientation between the main EFG component VZZ and the b-crystal axis (α=±6(2)°) and by the asymmetry parameter (η=0.04(2)). Mössbauer spectra of powder samples have been recorded at 293 K and at liquid helium temperature in an external magnetic field. In spite of the negligible Goldanskii-Karyagin effect observed in the powder sample a remarkable vibrational anisotropy was found in the crystal. The Lamb–Mössbauer factors along the main crystallographic directions are: fLM(a)=0.36(1); fLM(b)=0.23(1) and fLM(c)=0.50(1). The relative orientation of the main component of the MSD tensor with respect to the b-crystal axis is ω=±36(5)°.
Original language | English |
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Journal | Hyperfine Interactions |
Volume | 141-142 |
Issue number | 1-4 |
Pages (from-to) | 223-229 |
Number of pages | 7 |
ISSN | 0304-3843 |
DOIs | |
Publication status | Published - 28.06.2002 |