Optical properties of TMA2CdBr4 and TMA2MnBr4

Autor:	Rafael Valiente, Fernando Rodríguez, M.C. Marco de Lucas, J. I. Espeso
Rok vydání:	1993
Předmět:	Crystallography Phase transition temperature Birefringence Chemistry Materials Chemistry Orthorhombic crystal system General Chemistry Condensed Matter Physics Monoclinic crystal system Principal axis theorem
Zdroj:	Solid State Communications. 86:663-666
ISSN:	0038-1098
DOI:	10.1016/0038-1098(93)90835-b
Popis:	The optical properties of [(CH3)4N]2MBr4 (M = Cd and Mn) crystals are investigated. Both crystals are positive biaxial with the principal axes of the optic indicatrix nα, nβ and nγ along the a, b and c orthorhombic directions, respectively. The birefringence, optic angle and refractive indexes were measured at room temperature. The monoclinic domain structure observed below Pmcn → P121/c1 phase transition temperature is also analyzed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d9755e11424abbfb5dcd9f9120f7fefb https://doi.org/10.1016/0038-1098(93)90835-b Zobrazit plný text záznamu