XiRelevant articles and documents
All total 14 Articles be found
All total 14 Articles be foundTheoretical and Experimental Study of the Crystal Structures, Lattice Vibrations, and Band Structures of Monazite-Type PbCrO4, PbSeO4, SrCrO4, and SrSeO4
Errandonea, Daniel,Muoz, Alfonso,Rodrguez-Hernndez, Placida,Proctor, John E.,Sapia, Fernando,Bettinelli, Marco
, p. 7524 - 7535 (2015)
The crystal structures, lattice vibrations, and electronic band structures of PbCrO4, PbSeO4, SrCrO4, and SrSeO4 were studied by ab initio calculations, Raman spectroscopy, X-ray diffraction, and optical-absorpt
Novel alkali earth borohydride Sr(BH4)2 and borohydride-chloride Sr(BH4)Cl
Ravnsbaek,Nickels,Cerny,Olesen,David,Edwards,Filinchuk,Jensen
, p. 10877 - 10885 (2013)
Two novel alkali earth borohydrides, Sr(BH4)2 and Sr(BH4)Cl, have been synthesized and investigated by in-situ synchrotron radiation powder X-ray diffraction (SR-PXD) and Raman spectroscopy. Strontium borohydride, Sr(BH4)2, was synthesized via a metathesis reaction between LiBH4 and SrCl2 by two complementary methods, i.e., solvent-mediated and mechanochemical synthesis, while Sr(BH4)Cl was obtained from mechanochemical synthesis, i.e., ball milling. Sr(BH4)2 crystallizes in the orthorhombic crystal system, a = 6.97833(9) A, b = 8.39651(11) A, and c = 7.55931(10) A (V = 442.927(10) A3) at RT with space group symmetry Pbcn. The compound crystallizes in α-PbO2 structure type and is built from half-occupied brucite-like layers of slightly distorted [Sr(BH4)6] octahedra stacked in the a-axis direction. Strontium borohydride chloride, Sr(BH4)Cl, is a stoichiometric, ordered compound, which also crystallizes in the orthorhombic crystal system, a = 10.8873(8) A, b = 4.6035(3) A, and c = 7.4398(6) A (V = 372.91(3) A3) at RT, with space group symmetry Pnma and structure type Sr(OH)2. Sr(BH4)Cl dissociates into Sr(BH4)2 and SrCl2 at ～170 C, while Sr(BH4)2 is found to decompose in multiple steps between 270 and 465 C with formation of several decomposition products, e.g., SrB 6. Furthermore, partly characterized new compounds are also reported here, e.g., a solvate of Sr(BH4)2 and two Li-Sr-BH 4 compounds.
Enthalpies of formation of strontium dichloride and of the strontium ion (Sr2+) in water and in 1 mol * dm-3 HCl, and an assessment of enthalpies of formation of alkaline-earth dichlorides
Morss, Lester R.,Williams, Clayton W.
, p. 279 - 286 (1983)
Measurements of the enthalpy of solution of SrCl2 in water and in 1 mol * dm-3 HCl solution lead to ΔHf0 (SrCl2, c, 298.15 K) = -(832.7 +/- 0.9) kJ * mol-1, and to ΔHf0 (Sr2+, aq, 298.15 K)
Strontium-copper selenite-chlorides: Synthesis and structural investigation
Berdonosov, Peter S.,Olenev, Andrei V.,Dolgikh, Valery A.
, p. 2368 - 2373 (2009)
Two new complex selenite-chlorides of strontium and copper Sr2Cu(SeO3)2Cl2 (I) and SrCu2(SeO3)2Cl2 (II) were obtained and characterized by X-ray diffraction technique,
Ion-Ion-Solvent Interactions in Solution. XI Spectroscopic Studies of Group 2 Perchlorates in Acetone
James, David W.,Cutler, Paul G.
, p. 149 - 158 (1986)
Solutions of Mg(ClO4)2 and Sr(ClO4)2 in acetone have been studied at various concentrations up to saturation by using infrared absorption, Raman scattering and multinuclear n.m.r. (1H, 13C, 17O, 25Mg, 35Cl).Solvation numbers of c. 4.5 (Mg2+) and c. 5.5 (Sr2+) were determined from component band analysis of the c. 800 cm-1 acetone band in the Raman spectra.The solvent shell about the Mg2+ had a high level of steric crowding.There was a small amount of solvent-shared ion-pair formation at all concentrations in solutions of Mg(ClO4)2 which showed little concentration dependence.In solutions of Sr(ClO4)2 there was evidence for the formation of both solvent-shared associated-ion species and ion-contact species.The solvent-shared species appeared to have two alternative configurations in one of which the anion was both polarized and highly hindered.There was a salt-promoted reaction in which the perchlorate was reduced to chloride and the solution darkened.This reaction prevented the use of Raman spectra to quantify the association equilibria.
