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Titolo:
TI2NI2IN, ZR2CO2IN, AND ZR2PD2IN - INTERMETALLIC COMPOUNDS WITH ORDERED U3SI2 AND ZR3AL2 TYPE-STRUCTURE
Autore:
POTTGEN R; KOTZYBA G;
Indirizzi:
UNIV MUNSTER,INST ANORGAN CHEM,WILHELM KLEMM STR 8 D-48149 MUNSTER GERMANY
Titolo Testata:
Zeitschrift fur Naturforschung. B, A journal of chemical sciences
fascicolo: 9, volume: 51, anno: 1996,
pagine: 1248 - 1254
SICI:
0932-0776(1996)51:9<1248:TZAZ-I>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
METAL GOLD STANNIDES; ELECTRONIC-STRUCTURE; X-RAY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
R. Pottgen e G. Kotzyba, "TI2NI2IN, ZR2CO2IN, AND ZR2PD2IN - INTERMETALLIC COMPOUNDS WITH ORDERED U3SI2 AND ZR3AL2 TYPE-STRUCTURE", Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 51(9), 1996, pp. 1248-1254

Abstract

Ti2Ni2In, Zr2Co2In, and Zr2Pd2In were synthesized by reacting the elements in an arc-melting furnace and subsequent annealing at 1070 K. The compounds were investigated by ?C-ray diffraction on both powders aswell as single crystals. Zr2Co2In adopts the ordered U3Si2 type structure: P4/mbm, a = 720.54(7), c = 331.59(4) pm. The structure consists of planar [Co2In] layers with Co-2 dumb-bells which are separated by the zirconium atoms. Ti2Ni2In and Zr2Pd2In crystallize with the orderedZr3Al2 type structure (space group P4(2)/mnm), a superstructure of U3Si2: a = 694.3(2), c = 623.2(2) pm for Ti2Ni2In and a = 746.0(1), c = 686.1(1) pm for Zr2Pd2In. The Ni-2 and Pd-2 dumb-balls in the Ni2In and Pd2In layers of Ti2Ni2In and Zr2Pd2In are shifted from the mirror planes of the subcell resulting in puckered layers with weak interlayer Ni-Ni and Pd-Pd contacts, respectively. The indium atoms in these compounds occupy [Ti-8] and [Zr-8] square prisms while the transition metal atoms are surrounded by [Ti-6] and [Zr-6] trigonal prisms. These structural fragments are derived from the CsCl and AlB2 type structures. Chemical bonding in these intermetallic compounds is briefly discussed. Magnetic susceptibility measurements of compact polycrystalline samples indicate Pauli paramagnetism.

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Documento generato il 11/07/20 alle ore 21:06:43