A new 1 --> infinity [Ni7] cluster in LaNi7In6 and distorted bcc indium cubes in LaNiIn4.
Identifieur interne : 003859 ( Main/Exploration ); précédent : 003858; suivant : 003860A new 1 --> infinity [Ni7] cluster in LaNi7In6 and distorted bcc indium cubes in LaNiIn4.
Auteurs : RBID : pubmed:11822434Abstract
LaNiIn4 and LaNi7In, were prepared by reaction of the elements in an arc melting furnace and subsequent annealing at 870 K for five weeks. Both compounds were investigated by X-ray diffraction on powders and single crystals and the structures were refined from single-crystal data: Cmcm, a = 448.2(1), b = 1689.5(4). c = 722.1(1) pm, wR2 = 0.0340, 472 F2 values, 24 variables for LaNiIn4, and Ibam, a = 806.6(2). b = 924.8(2). c = 1246.5(2) pm. wR2 = 0.0681. 726 F2 values and 40 variables for LaNi7In,. LaNiIn4 adopts the YNiAl4-type structure. The nickel and indium atoms form a three-dimensional infinite [NiIn4] polyanion in which the lanthanum atoms fill distorted hexagonal channels. No Ni-Ni contacts occur. The indium substructure consists of distorted bcc-like indium cubes. LaNi7In6 crystallizes with a peculiar new structure type. The nickel atoms build a 1 --> infinity [Ni7] cluster unit with Ni-Ni distances ranging from 249 to 269 pm. The cluster units are enveloped by indium atoms. These larger units show an orthorhombic rod packing with the lanthanum atoms filling the space between the rods. Several nickel clusters in ternary rare earth metal nickel indides and the structural relations of the LaNi7In6 structure with the cubic NaZn13 type are discussed.
PubMed: 11822434
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">A new 1 --> infinity [Ni7] cluster in LaNi7In6 and distorted bcc indium cubes in LaNiIn4.</title><author><name sortKey="Kalychak, Y M" uniqKey="Kalychak Y">Y M Kalychak</name><affiliation wicri:level="1"><nlm:affiliation>Inorganic Chemistry Department, Ivan Franko National University of Lviv, Ukraine.</nlm:affiliation><country xml:lang="fr">Ukraine</country><wicri:regionArea>Inorganic Chemistry Department, Ivan Franko National University of Lviv</wicri:regionArea></affiliation></author><author><name sortKey="Zaremba, V I" uniqKey="Zaremba V">V I Zaremba</name></author><author><name sortKey="Galadzhun, Y V" uniqKey="Galadzhun Y">Y V Galadzhun</name></author><author><name sortKey="Miliyanchuk, K Y" uniqKey="Miliyanchuk K">K Y Miliyanchuk</name></author><author><name sortKey="Hoffmann, R D" uniqKey="Hoffmann R">R D Hoffmann</name></author><author><name sortKey="P Ttgen, R" uniqKey="P Ttgen R">R Pöttgen</name></author></titleStmt><publicationStmt><date when="2001">2001</date><idno type="RBID">pubmed:11822434</idno><idno type="pmid">11822434</idno><idno type="wicri:Area/Main/Corpus">003820</idno><idno type="wicri:Area/Main/Curation">003820</idno><idno type="wicri:Area/Main/Exploration">003859</idno></publicationStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">LaNiIn4 and LaNi7In, were prepared by reaction of the elements in an arc melting furnace and subsequent annealing at 870 K for five weeks. Both compounds were investigated by X-ray diffraction on powders and single crystals and the structures were refined from single-crystal data: Cmcm, a = 448.2(1), b = 1689.5(4). c = 722.1(1) pm, wR2 = 0.0340, 472 F2 values, 24 variables for LaNiIn4, and Ibam, a = 806.6(2). b = 924.8(2). c = 1246.5(2) pm. wR2 = 0.0681. 726 F2 values and 40 variables for LaNi7In,. LaNiIn4 adopts the YNiAl4-type structure. The nickel and indium atoms form a three-dimensional infinite [NiIn4] polyanion in which the lanthanum atoms fill distorted hexagonal channels. No Ni-Ni contacts occur. The indium substructure consists of distorted bcc-like indium cubes. LaNi7In6 crystallizes with a peculiar new structure type. The nickel atoms build a 1 --> infinity [Ni7] cluster unit with Ni-Ni distances ranging from 249 to 269 pm. The cluster units are enveloped by indium atoms. These larger units show an orthorhombic rod packing with the lanthanum atoms filling the space between the rods. Several nickel clusters in ternary rare earth metal nickel indides and the structural relations of the LaNi7In6 structure with the cubic NaZn13 type are discussed.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="PubMed-not-MEDLINE"><PMID Version="1">11822434</PMID><DateCreated><Year>2002</Year><Month>02</Month><Day>01</Day></DateCreated><DateCompleted><Year>2002</Year><Month>02</Month><Day>13</Day></DateCompleted><DateRevised><Year>2009</Year><Month>08</Month><Day>04</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0947-6539</ISSN><JournalIssue CitedMedium="Print"><Volume>7</Volume><Issue>24</Issue><PubDate><Year>2001</Year><Month>Dec</Month><Day>17</Day></PubDate></JournalIssue><Title>Chemistry (Weinheim an der Bergstrasse, Germany)</Title><ISOAbbreviation>Chemistry</ISOAbbreviation></Journal><ArticleTitle>A new 1 --> infinity [Ni7] cluster in LaNi7In6 and distorted bcc indium cubes in LaNiIn4.</ArticleTitle><Pagination><MedlinePgn>5343-9</MedlinePgn></Pagination><Abstract><AbstractText>LaNiIn4 and LaNi7In, were prepared by reaction of the elements in an arc melting furnace and subsequent annealing at 870 K for five weeks. Both compounds were investigated by X-ray diffraction on powders and single crystals and the structures were refined from single-crystal data: Cmcm, a = 448.2(1), b = 1689.5(4). c = 722.1(1) pm, wR2 = 0.0340, 472 F2 values, 24 variables for LaNiIn4, and Ibam, a = 806.6(2). b = 924.8(2). c = 1246.5(2) pm. wR2 = 0.0681. 726 F2 values and 40 variables for LaNi7In,. LaNiIn4 adopts the YNiAl4-type structure. The nickel and indium atoms form a three-dimensional infinite [NiIn4] polyanion in which the lanthanum atoms fill distorted hexagonal channels. No Ni-Ni contacts occur. The indium substructure consists of distorted bcc-like indium cubes. LaNi7In6 crystallizes with a peculiar new structure type. The nickel atoms build a 1 --> infinity [Ni7] cluster unit with Ni-Ni distances ranging from 249 to 269 pm. The cluster units are enveloped by indium atoms. These larger units show an orthorhombic rod packing with the lanthanum atoms filling the space between the rods. Several nickel clusters in ternary rare earth metal nickel indides and the structural relations of the LaNi7In6 structure with the cubic NaZn13 type are discussed.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Kalychak</LastName><ForeName>Y M</ForeName><Initials>YM</Initials><Affiliation>Inorganic Chemistry Department, Ivan Franko National University of Lviv, Ukraine.</Affiliation></Author><Author ValidYN="Y"><LastName>Zaremba</LastName><ForeName>V I</ForeName><Initials>VI</Initials></Author><Author ValidYN="Y"><LastName>Galadzhun</LastName><ForeName>Y V</ForeName><Initials>YV</Initials></Author><Author ValidYN="Y"><LastName>Miliyanchuk</LastName><ForeName>K Y</ForeName><Initials>KY</Initials></Author><Author ValidYN="Y"><LastName>Hoffmann</LastName><ForeName>R D</ForeName><Initials>RD</Initials></Author><Author ValidYN="Y"><LastName>Pöttgen</LastName><ForeName>R</ForeName><Initials>R</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType>Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Germany</Country><MedlineTA>Chemistry</MedlineTA><NlmUniqueID>9513783</NlmUniqueID><ISSNLinking>0947-6539</ISSNLinking></MedlineJournalInfo></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2002</Year><Month>2</Month><Day>2</Day><Hour>10</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2002</Year><Month>2</Month><Day>2</Day><Hour>10</Hour><Minute>1</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2002</Year><Month>2</Month><Day>2</Day><Hour>10</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">11822434</ArticleId><ArticleId IdType="pii">10.1002/1521-3765(20011217)7:24<5343::AID-CHEM5343>3.0.CO;2-#</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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