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Titolo:
THE CRYSTAL-STRUCTURE OF YPDSI, THE ISOTYPIC COMPOUNDS LNPDSI (LN = GD-LU), AND THEIR STRUCTURAL RELATION TO SOME OTHER EQUIATOMIC COMPOUNDS OF THE RARE-EARTH AND TRANSITION-METALS WITH MAIN-GROUP ELEMENTS
Autore:
PROTS YM; POTTGEN R; JEITSCHKO W;
Indirizzi:
UNIV MUNSTER,INST ANORGAN CHEM,WILHELM KLEMM STR 8 D-48149 MUNSTER GERMANY UNIV MUNSTER,INST ANORGAN CHEM D-48149 MUNSTER GERMANY
Titolo Testata:
Zeitschrift fur anorganische und allgemeine Chemie
fascicolo: 3, volume: 624, anno: 1998,
pagine: 425 - 432
SICI:
0044-2313(1998)624:3<425:TCOYTI>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
SILICIDES;
Keywords:
LANTHANOID PALLADIUM SILICIDES; CRYSTAL CHEMISTRY; EQUIATOMIC TERNARY COMPOUNDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
Y.M. Prots et al., "THE CRYSTAL-STRUCTURE OF YPDSI, THE ISOTYPIC COMPOUNDS LNPDSI (LN = GD-LU), AND THEIR STRUCTURAL RELATION TO SOME OTHER EQUIATOMIC COMPOUNDS OF THE RARE-EARTH AND TRANSITION-METALS WITH MAIN-GROUP ELEMENTS", Zeitschrift fur anorganische und allgemeine Chemie, 624(3), 1998, pp. 425-432

Abstract

The nine title compounds were prepared from the elements by are-melting and subsequent heat treatment in resistance and high-frequency furnaces. The crystal structure of these isotypic compounds was determinedfor YPdSi from single-crystal X-ray diffractometer data: Pmmn, a = 430.8(1)pm, b=1391.2(1)pm, c = 743.1(1)pm, Z = 8, R = 0.024 for 417 structure factors and 40 variable parameters. The crystal structures of the isotypic compounds GdPdSi and ErPdSi were also refined from single-crystal data. The structure is of a new type. It consists of condensed,six-membered rings of alternating palladium and silicon atoms with Pd-Si bond distances varying between 249.6 and 258.8 pm. These two-dimensionally infinite nets are connected to each other via weak Pd-Si and Si-Si bonds with bond distances of 276.3 and 259.5 pm. The rare earth atoms are situated above and below the six-membered palladium-silicon rings in a manner as it is known for the aluminum atoms in the AlB2 type structure. The crystal-chemical similarities and topologies of several structures derived from the aristotype AlB2 (including those of BaPtSb, EuAuGe, KHg2, ZrBeSi, and TiNiSi) are described, emphasizing their group-subgroup relationships. The previously reported compound ''Er2Pd2Si'' has the same structure as has been found here for ErPdSi.

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Documento generato il 10/07/20 alle ore 07:52:44