Crystal structure of KPb2Cl5 and KPb2Br5

Single crystal growth and surface chemical stability of KPb2Br5

“…The crystal structure of KPB, space group P2 1 /c, a¼8.854(2)Å, b¼7.927(2)Å, c¼12.485(3)Å, b¼90.05(3)1 and Z¼4, is shown in Fig. 1 [12].…”

Rare-Earth-Doped Low Phonon Energy Halide Crystals for Mid-Infrared Laser Sources

“…The twinning patterns observed under polarized light are due to the phase transition that occurs upon cooling the crystal, at T t =255 °C. The mechanism of this phase transition has been definitely unveiled in recent years simultaneously by us and a Russian team [Mel'nikova et al, 2005[Mel'nikova et al, , 2006Merkulov et al, 2005;Velázquez et al, 2006bVelázquez et al, , 2009Velázquez & Pérez, 2007]. The phase transition is driven by the K + and Pb(2) 2+ cationic ordering that induces a Pmcn to P2 1 /c symmetry change upon cooling, at 255 °C.…”

“…Table 1. Laser-related crystallographic, thermal, mechanical, optical and spectroscopical properties of selected low phonon energy halide crystals [Aleksandrov et al, 2005;Atuchin et al, 2011;Cockroft et al, 1992;Doualan & Moncorgé, 2003;Ferrier et al, 2006aFerrier et al, , 2007Ferrier et al, , 2008aFerrier et al, , 2008bFerrier et al, , 2009aFerrier et al, , 2009bHeber et al, 2001;Isaenko et al, 2008Isaenko et al, , 2009aIsaenko et al, , 2009bMalkin et al, 2001;Mel'nikova et al, 2005;Merkulov et al, 2005;Neukum et al, 1994;Nostrand et al, 2001;Okhrimchuk et al, 2006;Popova et al, 2001;Quagliano et al, 1996;Ren et al, 2003;Singh et al, 2005;Velázquez et al, 2006aVelázquez et al, , 2006bVirey et al, 1998;Vtyurin et al, 2004Vtyurin et al, , 2006. (*) per lead type of crystallographic site.…”

Optical and photoelectron spectroscopy studies of KPb2Cl5 and RbPb2Cl5 laser crystals

“…The sizes of the investigated samples were 7 Â 7 Â 1 mm 3 . The real crystal structure was studied in [32]. These crystals are biaxial, crystallize in the monoclinic system (space group P2 [32].…”