Crystal optical investigations of (C3H7NH3)2CuCl4

Autor:	W. J. Kusto
Rok vydání:	1988
Předmět:	Phase boundary Phase transition Range (particle radiation) Optics Birefringence Materials science Condensed matter physics business.industry Crystal optics Condensed Matter Physics business Refractive index Electronic Optical and Magnetic Materials
Zdroj:	Ferroelectrics. 80:285-288
ISSN:	1563-5112 0015-0193
DOI:	10.1080/00150198808223314
Popis:	The temperature dependence of the optical birefringence within the cleavage plane of the perovskite-type layer compound (C3H7NH3)2CuCl4 was measured in the region 290-450 K. The tetragonal-to-orthorhombic α - (3 ferroelastic phase transition occurs at T1=438 K and is of distinct first-order character. The α = (3 phase boundary could be observed. In the range ∼ 379 = ∼ 408 K, Δn(T) curve exhibits clear deviation from regular dependence which is similar to the anomalous birefringence behaviour connected with the well-known incommensurate reent-rant γ-phase of the manganium analogue (C3H7NH3)2MnCl4. The principal refractive indices were also measured.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6646cf425cd9b50afcebeb1363c1a2bf https://doi.org/10.1080/00150198808223314 Zobrazit plný text záznamu