Title :
Optical characteristics of Pb5Al3F19 -type crystals
Author :
Von Der Mühll, R. ; Ravez, J. ; Andriamampianina, V. ; Chaminade, J.P. ; Simon, A. ; Abrahams, S.C.
Author_Institution :
Lab. de Chimie du Solide, Bordeaux I Univ., Talence, France
fDate :
30 Aug-2 Sep 1992
Abstract :
Large colorless crystal of the Pb5Al3F19 type with dimensions approaching 1 cm3, have been grown in sealed platinum tubes by the Bridgman technique. The phase transitions in Pb5Al3F19 have been studied by optical microscopy on crystals oriented along different crystallographic directions. Ferroelastic domains have been observed; a reversible and reproducible ferroelastic-prototype transition has been shown. The thermal dependence of the birefringence has also been studied. The ferroic properties of Pb5Al3F19 are discussed in relation to the crystal symmetry
Keywords :
birefringence; crystal growth from melt; crystal orientation; ferroelastic transitions; ferroelectric materials; lead compounds; Bridgman technique; Pb5Al3F19; birefringence; crystal growth from melt; crystal orientation; crystal symmetry; crystallographic directions; ferroelastic domains; ferroelastic transition; Argon; Birefringence; Cooling; Crystals; Lead; Optical interferometry; Optical polarization; Powders; Solids; Temperature distribution;
Conference_Titel :
Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on
Conference_Location :
Greenville, SC
Print_ISBN :
0-7803-0465-9
DOI :
10.1109/ISAF.1992.300710
