The synthesis and crystal structures of the first rare-earth alkaline-earth selenite chlorides MNd10(SeO3)12Cl8 (M=Ca and Sr) |
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| Authors: | PS Berdonosov AV Olenev P Lightfoot |
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| Institution: | a Department of Chemistry, Moscow State University, Leninskie Gory, Moscow 119992, Russia
b EaStChem, School of Chemistry, St. Andrews University, St. Andrews, KY16 9ST, UK |
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| Abstract: | Two new alkaline-earth Nd selenite chlorides MNd10(SeO3)12Cl8 (M=Ca, Sr) were obtained using crystal growth from alkaline-earth chloride melts in quartz tubes. These new compounds crystallize in the orthorhombic system in space group C cca (#68). The compounds were studied by energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction. It was shown that both compounds adopt the same structure type, constructed by complex M11(SeO3)12]8+ slabs separated by chloride anion layers perpendicular to the longest cell parameter. The SeO3 groups show a pyramidal shape and may be described as SeO3E tetrahedra. Such SeO3 groups decorate the Nd-O skeletons forming the M11(SeO3)12]8+ slabs. |
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| Keywords: | Selenite chloride Rare earth compound Crystal structure |
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