EVOLUTION OF LATTICE-CONSTANTS OF LINBO3 DOPED WITH POTASSIUM AND MAGNESIUM

Authors
CERCLIER O GRACHEV V ESTIENNE J MALOVICHKO G
Citation
O. Cerclier et al., EVOLUTION OF LATTICE-CONSTANTS OF LINBO3 DOPED WITH POTASSIUM AND MAGNESIUM, Journal de physique. IV, 6(C4), 1996, pp. 49-54
Citations number
24
Categorie Soggetti
Physics
Journal title
Journal de physique. IV → ACNP
ISSN journal
11554339
Volume
6
Issue
C4
Year of publication
1996
Pages
49 - 54
Database
ISI
SICI code
1155-4339(1996)6:C4<49:EOLOLD>2.0.ZU;2-X
Abstract
The evolution of a and c lattice constants of nonstoichiometric LiNbO3 lithium niobate is compared with literature results. Addition of pota ssium oxide to the melt induces shortening of both parameters towards the stoichiometry, without incorporation in the crystal of potassium. On the contrary, with magnesium oxide addition in the melt, a lengthen ing of both parameters is connected with substitution of lithium by ma gnesium in a LiNbO3-Mg4Nb2O9 solid solution which obeys Vegard's law.