Synthesis, Crystal and Electronic Structure of the New Sulfido Ferrate Cs7[FeS2]2[Fe2S3]2
Synthesis, Crystal and Electronic Structure of the New Sulfido Ferrate Cs7[FeS2]2[Fe2S3]2
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新型硫化铁酸盐Cs7[FeS2]2[Fe2S3]2的合成、晶体及电子结构
DOI:
10.1002/zaac.201500097
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
C. Röhr
中科院分区:
文献类型:
--
作者:
M. Schwarz;C. Röhr
The intermediate‐valent sulfido ferrate Cs7[FeS2]2[Fe2S3]2, which forms needles with metallic greenish lustre, was synthesized in pure phase from Cs2S2, elemental iron and sulfur at a maximum temperature of 1000 °C in an argon atmosphere. The monoclinic structure [space groupC2/m,a= 3083.8(2),b= 559.03(3),c= 761.57(4) pm,β= 95.829(4)°,Z= 2,R1= 0.0715] represents a new structure type. It contains two different type of chain anions running along the monoclinicbdirection, one of them single chains [FeII/IIIS4/2]1.5–of [FeS4] tetrahedra connected by opposite edges, which are similarly found as sole anions in mixed‐valent chain ferrates(II/III) like e.g. Cs3[Fe2S4]. The second sulfido ferrate ion, double chains [FeII2S3]2–of two fused single chains, is comparable to the building blocks in the structure of the intermediate‐valent mineral pautovite, Cs[FeII, III2S3], and the ferrate(II) Ba[FeII2S3]. Corrected for the local disorder of two cesium sites, the Cs cations separating the two chain ferrate ions are coordinated by 7 to 8 sulfur atoms. The assignment of the iron charges in the two different chain anions is consistent, regardless whether geometric features like Fe–S and Fe–Fe distances (as compared with related compounds) or lattice energy calculations are taken into account. It is further supported by the Fe pDOS and the Bader charges obtained from an FP‐LAPW spin‐polarized GGA+Ubandstructure calculation of the title compound.
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DOI:
10.1002/zaac.201400357
发表时间:
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期刊:
Zeitschrift für anorganische und allgemeine Chemie
影响因子:
--
作者:
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1980
期刊:
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DOI:
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发表时间:
2013
期刊:
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影响因子:
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