SYNTHESIS, STRUCTURES AND LUMINESCENCE OF 2 NEW EUROPIUM(II) SILICATE-CHLORIDES, EU2SIO3CL2 AND EU5SIO4CL6

Authors
JACOBSEN H MEYER G SCHIPPER W BLASSE G
Citation
H. Jacobsen et al., SYNTHESIS, STRUCTURES AND LUMINESCENCE OF 2 NEW EUROPIUM(II) SILICATE-CHLORIDES, EU2SIO3CL2 AND EU5SIO4CL6, Zeitschrift fur anorganische und allgemeine Chemie, 620(3), 1994, pp. 451-456
Citations number
26
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur anorganische und allgemeine Chemie
ISSN journal
00442313 → ACNP
Volume
620
Issue
3
Year of publication
1994
Pages
451 - 456
Database
ISI
SICI code
0044-2313(1994)620:3<451:SSALO2>2.0.ZU;2-X
Abstract
Eu2SiO3Cl2 and Eu5SiO4Cl6 were prepared by reaction of EuCl2 with EuSi O3 and Eu2SiO4, respectively, Sr2SiO3Cl2:Eu2+ from mixtures of SrCO3, Eu2O3, SrCl2 . 6H2O and SiO2 under reducing conditions. The crystal st ructures of Eu2SiO3Cl2 [a = 1118.7(5), c = 952.6(1) pm, tetragonal, I4 /m, Z = 8, R = 3.3, R(w) = 3.0%] and Eu5SiO4Cl6 [a = 900.4(1), b = 140 1.7(2), c = 1112.3(2) pm, beta = 103.51(1)degrees, monoclinic, C2/c, Z = 4, R = 3.6, R, = 2.6%] were determined from four-circle diffractome ter data and compared with related compounds. The luminescence propert ies were investigated at 300 K and at 4.2 K; all compounds show intens e bluish-green photoluminescence. Sr2SiO3Cl2:Eu2+ shows thermoluminesc ence.