Über Sulfide und Oxidsulfide des Samariums

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dc.identifier.uri http://dx.doi.org/10.15488/2506
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/2532
dc.contributor.author Lissner, Falk
dc.contributor.author Schleid, Thomas
dc.date.accessioned 2017-11-24T13:09:01Z
dc.date.available 2017-11-24T13:09:01Z
dc.date.issued 1992
dc.identifier.citation Lissner, F.; Schleid, T.: Über Sulfide und Oxidsulfide des Samariums. In: Zeitschrift für Naturforschung - Section B Journal of Chemical Sciences 47 (1992), Nr. 11, S. 1614-1620. DOI: https://doi.org/10.1515/znb-1992-1116
dc.description.abstract Stoichiometric oxidation of SmCl2 with sulfur in the presence of NaCl (evacuated silica vessel, 850 °C, 7 d) results in the formation of A—Sm2S3 (orthorhombic, Pnma (no. 62), a = 737.64(5), b = 397.44(3), c = 1536.26(9) pm, Z = 4, Rw = 0.017). In contrast, C—Sm2S3 (cubic, I43 d (no. 220), a = 844.71(3) pm, Z = 5.333, Rw = 0.017) is obtained upon reaction of the elements (Sm : S = 2 : 3) under otherwise analogous conditions. According to Sm2.67⬜0.33S4 it represents a defect-variant of mixed-valence Th3P4-type Sm3S4 (a = 852.39(3) pm, Z = 4, Rw = 0.013) which forms whenever reducing tantalum is used as container material instead of silica tubing. Ubiquitous oxidic impurities thereby also react to yield the oxygen-poor oxysulfides Sm10S14O (tetragonal, 141/acd (no. 142), a = 1485.96(4), c = 1974.04(8), Z = 8) and Sm2OS2 (monoclinic, P21/c (no. 14), a = 840.54(6), b = 706.20(5), c = 697.72(5) pm, β = 99.294(6)°, Ζ = 4, Rw = 0.024) as by-products. Regardless of the container material, NaCltype SmS (cubic, Fm 3 m (no. 225), a = 596.04(3) pm, Z = 4) emerges as product from equimolar oxidation of samarium with sulfur. Reactions of Sm2S3 with Sm2O3 in 1: 2 molar ratios are suitable to produce Ce2O2S-type Sm2O2S (trigonal, P 3 ml (no. 164), a = 389.25(3), c = 671.18(7) pm, Z = 1) even in tantalum capsules at 850 °C when some NaCl is added as a flux. eng
dc.language.iso ger
dc.publisher Berlin : De Gruyter
dc.relation.ispartofseries Zeitschrift für Naturforschung - Section B Journal of Chemical Sciences 47 (1992), Nr. 11
dc.rights CC BY-NC-ND 3.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/3.0/
dc.subject Crystal Structure eng
dc.subject Oxysulfides eng
dc.subject Samarium eng
dc.subject Sulfides eng
dc.subject.ddc 540 | Chemie ger
dc.title Über Sulfide und Oxidsulfide des Samariums ger
dc.type article
dc.type Text
dc.relation.essn 1865-7117
dc.relation.issn 0932-0776
dc.relation.doi https://doi.org/10.1515/znb-1992-1116
dc.bibliographicCitation.issue 11
dc.bibliographicCitation.volume 47
dc.bibliographicCitation.firstPage 1614
dc.bibliographicCitation.lastPage 1620
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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