22750-57-8Relevant articles and documents
Synthesis, structural characterization, and physical properties of Cs2Ga2S5, and redetermination of the crystal structure of Cs2S6
Friedrich, Daniel,Pielnhofer, Florian,Schlosser, Marc,Weihrich, Richard,Pfitzner, Arno
, p. 1811 - 1817 (2015)
The reaction of CsN3 with GaS and S at elevated temperatures results in Cs2Ga 2S5. Its crystal structure was determined from single-crystal X-ray diffraction data. The colorless solid crystallizes in space group C2/c (no. 15) with V= 1073.3(4) ?3 and Z = 4. Cs2Ga2S5 is the first compound that features one-dimensional chains 1∞[Ga2S3(S 2)2-] of edge- and corner-sharing GaS4 tetrahedra. The vibrational band of the S22- units at 493 cm-1 was revealed by Raman spectroscopy. Cs2Ga 2S5 has a wide bandgap of about 3.26 eV. The thermal decomposition of CsN3 yields elemental Cs, which reacts with sulfur to provide Cs2S6 as an intermediate product. The crystal structure of Cs2S6 was redetermined from selected single crystals. The red compound crystallizes in space group P1 with V = 488.99(8) ?3 and Z = 2. Cs2S6 consists of S62- polysulfide chains and two Cs positions with coordination numbers of 10 and 11, respectively. Results of DFT calculations on Cs2Ga2 S5 are in good agreement with the experimental crystal structure and Raman data. The analysis of the chemical bonding behavior revealed completely ionic bonds for Cs, whereas GaS and SS form polarized and fully covalent bonds, respectively. HOMO and LUMO are centered at the S2 units.
Improved synthesis of CsN3
Gerken, Michael,Schneider, Stefan,Schroer, Thorsten,Haiges, Ralf,Christe, Karl O.
, p. 909 - 910 (2002)
Cesium azide can conveniently be prepared from anhydrous CsF and (CH3)3SiN3 in SO2 solvent in high purity and yield. In this reaction, the initially generated SO2F- anion is converted in SO
The Family of A6M2O6 Oxometalates: Synthesis and Crystal Structure Determination of Cs6Mn2O6, Magnetic Exchange within Dimeric Poly-oxoanions, and Classification of Crystal Structures
Nuss, Jürgen,Kremer, Reinhard K.,Thakur, Gohil S.,Jansen, Martin
, p. 882 - 887 (2019)
The new compound Cs6Mn2O6 was synthesized via the azide/nitrate route. According to single-crystal X-ray analysis (P1; a = 695.74(7), b = 733.24(7), c = 735.12(7) pm, α = 78.559(4), β = 62.685(3), γ = 88.788(4)°; 2705 independent data, R1 = 0.041), the anionic part of the compound consists of dimeric Mn2O6 units, formed by edge sharing of two MnO4 polyhedra of a shape intermediate between tetrahedral and square planar. The crystal structure is singular, however, can be related to several oxides of the same general formula by group-subgroup symmetry descent. The magnetic properties of Cs6Mn2O6 have been simulated by an antiferromagnetic dimer model of spin S = 2 entities, considering a small temperature dependence of the spin exchange parameters.
RbGa3S5 und CsGa3S5 - Zwei neue strukturtypen
Schlosser, Marc,Frettloeh, Vanessa,Deiseroth, Hans-Joerg
, p. 94 - 98 (2009)
The title compounds RbGa3S5 and CsGa 3S5 were synthesized by a solid state reaction starting from GaS, S and MN3 (M = Rb, Cs) as alkaline metal source. They crystallize in the space group P21/su
Synthesis, Crystal Structure, and Physical Properties of Two Polymorphs of CsGaSe2, and High-Temperature X-ray Diffraction Study of the Phase Transition Kinetics
Friedrich, Daniel,Schlosser, Marc,Pfitzner, Arno
, p. 3983 - 3992 (2016)
The light gray selenogallate CsGaSe2-mC64 was obtained by reaction of stoichiometric amounts of CsN3, GaSe, and Se at elevated temperatures. Its crystal structure was determined by single-crystal X-ray diffraction. The compound crystallizes in the monoclinic space group C2/c (No. 15) with a = 11.043(2) ?, b = 11.015(4) ?, c = 16.810(2) ?, β = 99.49(1) °, V = 2016.7(8) ?3, and Z = 16 (powder data, ambient temperature). Its crystal structure features anionic layers 2[Ga4Se84-] consisting of corner-sharing Ga4Se10 supertetrahedra. The compound undergoes a first-order phase transition at temperatures of 610 ± 10 °C. The high-temperature phase CsGaSe2-mC16 also crystallizes in the monoclinic space group C2/c (No. 15) with a = 7.651(3) ?, b = 12.552(4) ?, c = 6.170(3) ?, β = 113.62(4)°, V = 542.9(5) ?3, and Z = 4 (powder data, ambient temperature). The crystal structure of the high-temperature phase consists of SiS2 analogous chains 1[GaSe2-]. In situ high-temperature X-ray diffraction experiments were performed to study this phase transition. The crystallization kinetics of the phase transitions were studied using Johnson-Mehl-Avrami-Kolmogorov (JMAK) theory for isothermal crystallization processes. The activation energy of the phase transition was determined using the Arrhenius equation. Furthermore, the compound was studied by vibrational and diffuse reflectance spectroscopy.
