Anisotropic effects of bromine substitution in betaine calcium chloride dihydrate

• Type: Article in International Scientific Journal
• Date: 2004

Authors

Vieira, LG (Author) Other; Ribeiro, JL (Author) Other; Chaves, MR (Author) Other; Almeida, A (Author) FCUP; Hernandez, O (Author) Other; Quilichini, M (Author) Other; Klopperpieper, A (Author) Other

Journal

Title: Ferroelectrics

Vol. 302

Pages: 397-399

ISSN: 0015-0193

Publisher: Taylor & Francis

Indexing

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Other information

Authenticus ID: P-000-CQQ

DOI: 10.1080/00150190490453360

Abstract (EN): The effects of partial substitution of chlorine by bromine in incommensurate betaine calcium chloride di-hydrate (BCCD) have been investigated by FTIR reflectivity and elastic neutron scattering. Bromine distorts the H-bonds linking the Ca complexes and induces local symmetry breaking. The temperature dependence of b and c lattice parameters of the 4% and 8% brominated compounds reveals that this distortion has effects that are markedly anisotropic. This anisotropy may help to clarify why bromine progressively destabilizes the low temperature phases of BCCD.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 3