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Citation: Chen Xian-Zhong, Wang Shi-Hua, He Guan-You, Zhao Xin-Hua, Jiang Sheng-Bang. Synthesis and Structure of CsSm₂I₅ and CsSmI₃[J]. Acta Physico-Chimica Sinica, ;1993, 9(05): 687-691. doi: 10.3866/PKU.WHXB19930522 shu

Synthesis and Structure of CsSm₂I₅ and CsSmI₃

1.
Department of Chemistry, Beijing Normal University, Beijing 100875

Received Date: 13 March 1992
Available Online: 15 October 1993

The ternary iodides CsSm_2I_5 and CsSmI_3 which contain a divalentt rare earth cation have been synthesized by direct reaction of SmI_2 with CsI and by reaction between Sm, HgI_2 and CsI. Their crystal structures are determined by X-ray powder diffraction technique. CsSm_2I_5 is isostruetural with NH_4Pb_2Cl_5 (monoclinic, p2_1/c) a=1.0219(3) nm, b=9.093(2) nm, c=1.4300(6) nm, β=90.35(4)°, z=4, D_0=5.26 g·cm~(-3) at 25 ℃, D_x=5.34 g·cm~(-3) and MV_x=200.0 cm·mol~(-1). CsSmI_3 is Iso-structural with SrCeO_3 (orthorhombic, Pmmm), a=0.8631(3) nm, b=1.7999(6) nm, c=1.2564(5) nm, z=8, D_0=4.76 g·cm~(-3) at 25 ℃, D_x=4.52 g·cm~(-3), and MV_x=146.9 cm·mol~(-1). The valency of samarium in both compounds were determined and confirmed to be +2 by polarographic analyzer and fluorescence spectra.
- One-step synthesis; CsSm₂I₅; CsSmI₃; Structure; Fluorescence spectra
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沈阳化工大学材料科学与工程学院沈阳 110142

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Synthesis and Structure of CsSm2I5 and CsSmI3

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Synthesis and Structure of CsSm₂I₅ and CsSmI₃