Phase diagram of mixed LiK1-xRbxSO4 crystals

Autor:	Patrice Bourson, Ph. Galez, Alejandro Ayala, Ariete Righi, Roberto L. Moreira, J.L. Soubeyroux
Rok vydání:	1998
Předmět:	Phase transition Inorganic chemistry Hexagonal phase Analytical chemistry chemistry.chemical_element General Chemistry Atmospheric temperature range Condensed Matter Physics Rubidium Crystal chemistry Phase (matter) Materials Chemistry Phase diagram Solid solution
Zdroj:	Solid State Communications. 107:193-196
ISSN:	0038-1098
DOI:	10.1016/s0038-1098(98)00178-1
Popis:	Neutron powder thermodiffractometry has been used to determine the phase diagram of LiK 1- x Rb x SO 4 mixed crystals ( x ≤ 0.50), between 50 and 800 K. We observed that, in this temperature range, these crystals undergo practically the same sequence of phase transitions as pure LiKSO 4 crystal. The main effects of the presence of rubidium ions in the potassium sites are seen in the variations of the critical temperatures and in the smearing of the first order transitions. We observed the narrowing of the region of the room temperature hexagonal phase with increasing Rb concentration. Its upper limit temperature decreases, while the lower one increases, favoring the trigonal phase. The low-temperature ferroelastic phase is absent for crystals with Rb concentration higher than c.a. 0.30.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::44e6992faf6329fa83c506b9982989e4 https://doi.org/10.1016/s0038-1098(98)00178-1 Zobrazit plný text záznamu Full Text from ScienceDirect