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- W1970211301 abstract "The new compounds, Sr6Sb6S17, Ba2.62Pb1.38Sb4S10, and Ba3Sb4.66S10 were prepared by the molten polychalcogenide salt method. Sr6Sb6S17 crystallizes in the orthorhombic space group P2(1)2(1)2(1) with a = 8.2871(9) A, b = 15.352(2) A, c = 22.873(3) A, and Z = 4. This compound presents a new structure type composed of [Sb3S7]5- units and trisulfide groups, (S3)2-, held together by Sr2+ ions. The [Sb3S7]5- fragment is formed from three corner-sharing SbS3 trigonal pyramids. The trisulfide groups are separated from the [Sb3S7]5- unit and embedded between the Sr2+ ions. Ba3Sb4.66S10 and Ba2.62Pb1.38Sb4S10 are not isostructural but are closely related to the known mineral sulfosalts of the rathite group. Ba3Sb4.67S10 is monoclinic P2(1)/c with a = 8.955(2) A, b = 8.225(2) A, c = 26.756(5) A, beta = 100.29(3) degrees, and Z = 4. Ba2.62Pb1.38Sb4S10 is monoclinic P2(1) with a = 8.8402(2) A, b = 8.2038(2) A, c = 26.7623(6) A, beta = 99.488(1) degrees, and Z = 4. The Sb atoms are stabilized in SbS3 trigonal pyramids that share corners to build ribbonlike slabs, which are stitched by Ba/Pb atoms to form layers perpendicular to the c-axis. These materials are semiconductors and show optical band gaps of 2.10, 2.14, and 1.64 eV for Sr6Sb6S17, Ba3Sb4.66S10, and Ba2.62Pb1.38Sb4S10, respectively. Raman spectroscopic characterization is reported. Sr6Sb6S17, Ba3Sb4.66S10, and Ba2.62Pb1.38Sb4S10 melt congruently at 729, 770, and 749 degrees C, respectively." @default.
- W1970211301 created "2016-06-24" @default.
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- W1970211301 date "2000-11-15" @default.
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- W1970211301 title "Sulfosalts with Alkaline Earth Metals. Centrosymmetric vs Acentric Interplay in Ba<sub>3</sub>Sb<sub>4.66</sub>S<sub>10</sub> and Ba<sub>2.62</sub>Pb<sub>1.38</sub>Sb<sub>4</sub>S<sub>10</sub> Based on the Ba/Pb/Sb Ratio. Phases Related to Arsenosulfide Minerals of the Rathite Group and the Novel Polysulfide Sr<sub>6</sub>Sb<sub>6</sub>S<sub>17</sub>" @default.
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- W1970211301 doi "https://doi.org/10.1021/ic000632m" @default.
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