Hochdrucksynthese und kristallstruktur von Pd8Al21, Pd8Al17Si4 und Pt8Al21
作者： Klaus-Jürgen Range , Ernst G. Christl
DOI: 10.1016/0022-5088(88)90431-6
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摘要: The intermetallic phases Pd8Al21, (Pd8Al17Si4) Pt8Al21 were synthesized from the elements by high pressure-high temperature synthesis in a modified belt-type apparatus. isotypic compounds crystallize tetragonal struc ture with space group I41a, Z = 4, lattice constants 12.962(2) A, c 10.684(2) A (Pd8Al21), 12.962(3) 10.682(2) and =12.949(3) 10.659(3) In complicated crystal structure, transition metal atoms are 10-fold coordinated aluminium (or silicon); (except at atomic positions Al(1) Al(5)) surrounded four heavy atoms. Pd8Al21, true high-pressure phases, being only metastable under normal conditions.
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