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Quaternary alumogermanides in the Er-{Co,Ni}-Al-Ge systems

Grygorii DEMCHENKO, Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Joanna KOŃCZYK, Pavlo DEMCHENKO, Roman GLADYSHEVSKII, Wiesław MAJZNER, Liliya MURATOVA, Institute of Chemistry and Environment Protection, Jan Dlugosz University, Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Institute of Technical Biochemistry, Technical University of Łódź, Department of Chemistry, Danylo Halytskii National Medical University of Lviv
2008 Chemistry of Metals and Alloys  

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The crystal structures of two new quaternary alumogermanides have been determined from X-ray single crystal and powder diffraction data. Er 2 CoAl 4 Ge 2 crystallizes with a Tb 2 NiAl 4 Ge 2 -type structure: space group I4/mmm, Pearson symbol tI18, cell parameters a = 4.0970(6), c = 19.343(4) Å, R1 = 0.0492, wR2 = 0.1195, Goof = 1.115, whereas the structure of ErNiAl 4 Ge 2 adopts the YNiAl 4 Ge 2 type: space group R   m, Pearson symbol hR24, cell parameters a = 4.07160(8), c = 30.7027(9)
more » ... R p = 0.0550, R wp = 0.0708, R B = 0.0523, R F = 0.0402, χ χ χ χ 2 = 3.54. The structures are ordered and built up from structural slabs characteristic of binary and ternary compounds via intergrowth. Rare-earth alumogermanides / Crystal structure / X-ray diffraction
doi:10.30970/cma1.0056 fatcat:hrxaht4skzflvc4wvi3qd6rb6u
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Grygorii DEMCHENKO, Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Joanna KOŃCZYK, Pavlo DEMCHENKO, Roman GLADYSHEVSKII, Wiesław MAJZNER, Liliya MURATOVA, Institute of Chemistry and Environment Protection, Jan Dlugosz University, Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Institute of Technical Biochemistry, Technical University of Łódź, Department of Chemistry, Danylo Halytskii National Medical University of Lviv. "Quaternary alumogermanides in the Er-{Co,Ni}-Al-Ge systems." Chemistry of Metals and Alloys 1.3/4 (2008) 254-260