Author
Jürgen Küster
Bio: Jürgen Küster is an academic researcher from University of Kiel. The author has an hindex of 2, co-authored 2 publications receiving 53 citations.
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31 citations
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TL;DR: In this article, the sorption and desorption of aqueous HgCl 2 on Fe 1− x S, FeS 2, and PbS have been studied using high resolution X-ray photoelectron and Auger electron spectroscopies.
87 citations
TL;DR: In this article, two quaternary salts, [Hg{sub 3}Te{sub 2}][UCl{sub 6}] and [Hhsub 4}As{sub 1] [UCl[sub 6]], have been synthesized and their structures determined by single-crystal X-ray diffraction analysis.
60 citations
TL;DR: In this article, the crystal structures of shandite, parkerite and their Pd homologues are investigated in terms of ordered half antiperovskites AM3/2S (A = Pb, Bi; M = Ni, Pd).
46 citations
TL;DR: In this article, the crystal structure of Pd3Bi2S2 was determined from x-ray diffraction data and compared to parkerite (Ni3Bi 2S2), shandite, and a high pressure form of laflammeite (Pd3Pb2S 2).
Abstract: Halfantiperovskites II: on the Crystal Structure of Pd3Bi2S2
The crystallographic structure of Pd3Bi2S2 was determined from x-ray diffraction data and compared to parkerite (Ni3Bi2S2), shandite (Ni3Pb2S2), and a high pressure form of laflammeite (Pd3Pb2S2). For Pd3Bi2S2 the structure type of corderoite, Hg3S2Cl2 (I213) was found that represents a cubic variant (a = 8,3097(9) A) of the parkerite structure. It turns out to be a structural antitype of the low temperature cubic modification of K2Sn2O3, analogously to the previously investigated type-antitype relation of shandit to high-temperature K2Sn2O3. The crystal structures are derived from perovskites ABO3 and antiperovskites M3AX with only half of the O- and M-sites being occupied. The M = Ni, Pd site ordering in shandite and parkerite type compounds is discussed in terms of ordered half antiperovskite (HAP) structures M3/2AS (A = Bi, Pb). The electronic band structure of Pd3Bi2S2 is calculated within the framework of density functional theory. The compound is found to behave metallic while K2Sn2O3 and corderoite are semiconductors. The bonding is analysed in terms of covalently bond [Pd3S2]δ− networks as proposed for [Sn2O3]2− and [Hg3S2]2+.
44 citations
TL;DR: The high Z chalcohalides Hg3Q2I2 (Q = S, Se, and Te) can be regarded as of antiperovskite structure with ordered vacancies and are demonstrated to be very promising candidates for X- and γ-ray semiconductor detectors.
Abstract: The high Z chalcohalides Hg3Q2I2 (Q = S, Se, and Te) can be regarded as of antiperovskite structure with ordered vacancies and are demonstrated to be very promising candidates for X- and γ-ray semiconductor detectors Depending on Q, the ordering of the Hg vacancies in these defect antiperovskites varies and yields a rich family of distinct crystal structures ranging from zero-dimensional to three-dimensional, with a dramatic effect on the properties of each compound All three Hg3Q2I2 compounds show very suitable optical, electrical, and good mechanical properties required for radiation detection at room temperature These compounds possess a high density (>7 g/cm3) and wide bandgaps (>19 eV), showing great stopping power for hard radiation and high intrinsic electrical resistivity, over 1011 Ω cm Large single crystals are grown using the vapor transport method, and each material shows excellent photo sensitivity under energetic photons Detectors made from thin Hg3Q2I2 crystals show reasonable respons
40 citations