Raman spectroscopy of M3B7O13X boracites (M = Cr,Co,Ni,Cu,Zn,Cd; X = Cl,Br,I)
Article first published online: 3 MAR 2014
Copyright © 2014 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Volume 45, Issue 4, pages 267–273, April 2014
How to Cite
Iliev, M. N. and Schmid, H. (2014), Raman spectroscopy of M3B7O13X boracites (M = Cr,Co,Ni,Cu,Zn,Cd; X = Cl,Br,I). J. Raman Spectrosc., 45: 267–273. doi: 10.1002/jrs.4458
- Issue published online: 6 APR 2014
- Article first published online: 3 MAR 2014
- Manuscript Accepted: 3 FEB 2014
- Manuscript Revised: 16 JAN 2014
- Manuscript Received: 9 DEC 2013
- crystallographic transitions;
- growth sectors
We report results of a Raman study on single crystals of 16 boracites M3B7O13X (M = Cr,Co,Ni,Cu,Zn,Cd; X = Cl,Br,I) over a broad temperature range. The Raman modes for all boracites in their high-temperature prototype cubic (F3c) phase are compared. With decreasing temperature, most (but not all) compounds present a transition to the low-temperature orthorhombic phase (Pca21) or to a sequence of orthorhombic, monoclinic (Pa), and trigonal (R3c) phases. The variations of the Raman spectra through different phases are studied in detail. Special attention is paid to the temperature hysteresis near the transitions and the dependence of transition temperature on the direction of crystal growth for the same material. Copyright © 2014 John Wiley & Sons, Ltd.