Preparation and Crystal Structure of the Calcium Rhenate(VI, VII) Ca5Re3O15-x
The title compound was prepared by reaction of elemental calcium with the calcium metaperrhenate Ca(ReO . Its crystal structure was determined from single-crystal X-ray data: Amm2, a = 560.31 (5)pm, b = 1572.4( 1)pm, c = 719.91 (6)pm ,Z = 2 ,R = 0.033 for 930 structure factors and 46 variable parame...
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| Veröffentlicht in: | Zeitschrift für Naturforschung. B, A journal of chemical sciences A journal of chemical sciences, 1999-12, Vol.54 (12), p.1483-1488 |
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| container_title | Zeitschrift für Naturforschung. B, A journal of chemical sciences |
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| creator | Jeitschko, Wolfgang Mons, Horst A. Rodewald, Ute Ch |
| description | The title compound was prepared by reaction of elemental calcium with the calcium metaperrhenate Ca(ReO
. Its crystal structure was determined from single-crystal X-ray data: Amm2, a = 560.31 (5)pm, b = 1572.4( 1)pm, c = 719.91 (6)pm ,Z = 2 ,R = 0.033 for 930 structure factors and 46 variable parameters. The calcium atoms occupy three atomic sites, all with seven oxygen neighbors. Of the two different rhenium atoms one has square-pyramidal oxygen coordination with an average oxidation number +6.25. The other rhenium site (oxidation number +7) was refined as a split position with trigonal-bipyramidal (75%) and tetrahedral oxygen coordination (25%). One oxygen site remains unoccupied, whenever the tetrahedral rhenium site is occupied, resulting in the composition Ca
Re
. A test for superconductivity of this black compound down to 1.5 K was negative. |
| doi_str_mv | 10.1515/znb-1999-1201 |
| format | Article |
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. Its crystal structure was determined from single-crystal X-ray data: Amm2, a = 560.31 (5)pm, b = 1572.4( 1)pm, c = 719.91 (6)pm ,Z = 2 ,R = 0.033 for 930 structure factors and 46 variable parameters. The calcium atoms occupy three atomic sites, all with seven oxygen neighbors. Of the two different rhenium atoms one has square-pyramidal oxygen coordination with an average oxidation number +6.25. The other rhenium site (oxidation number +7) was refined as a split position with trigonal-bipyramidal (75%) and tetrahedral oxygen coordination (25%). One oxygen site remains unoccupied, whenever the tetrahedral rhenium site is occupied, resulting in the composition Ca
Re
. A test for superconductivity of this black compound down to 1.5 K was negative.</description><identifier>ISSN: 0932-0776</identifier><identifier>EISSN: 1865-7117</identifier><identifier>DOI: 10.1515/znb-1999-1201</identifier><language>eng</language><publisher>Verlag der Zeitschrift für Naturforschung</publisher><subject>Crystal Structure ; Mixed Valence ; Perrhenates ; Rhenates</subject><ispartof>Zeitschrift für Naturforschung. B, A journal of chemical sciences, 1999-12, Vol.54 (12), p.1483-1488</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Jeitschko, Wolfgang</creatorcontrib><creatorcontrib>Mons, Horst A.</creatorcontrib><creatorcontrib>Rodewald, Ute Ch</creatorcontrib><title>Preparation and Crystal Structure of the Calcium Rhenate(VI, VII) Ca5Re3O15-x</title><title>Zeitschrift für Naturforschung. B, A journal of chemical sciences</title><description>The title compound was prepared by reaction of elemental calcium with the calcium metaperrhenate Ca(ReO
. Its crystal structure was determined from single-crystal X-ray data: Amm2, a = 560.31 (5)pm, b = 1572.4( 1)pm, c = 719.91 (6)pm ,Z = 2 ,R = 0.033 for 930 structure factors and 46 variable parameters. The calcium atoms occupy three atomic sites, all with seven oxygen neighbors. Of the two different rhenium atoms one has square-pyramidal oxygen coordination with an average oxidation number +6.25. The other rhenium site (oxidation number +7) was refined as a split position with trigonal-bipyramidal (75%) and tetrahedral oxygen coordination (25%). One oxygen site remains unoccupied, whenever the tetrahedral rhenium site is occupied, resulting in the composition Ca
Re
. A test for superconductivity of this black compound down to 1.5 K was negative.</description><subject>Crystal Structure</subject><subject>Mixed Valence</subject><subject>Perrhenates</subject><subject>Rhenates</subject><issn>0932-0776</issn><issn>1865-7117</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><sourceid/><recordid>eNot0M1Lw0AQBfBFFKzVo_c9Krg6sx_J7sGDhKqBSqVqr2GSbmxLTGWzQetfb4qe5sHAe_Bj7BzhGg2am5-2FOicEygBD9gIbWJEipgeshE4JQWkaXLMTrpuA4BOaxixp-fgPylQXG9bTu2SZ2HXRWr4Swx9Ffvg-bbmceV5Rk217j_4fOVbiv5ikV_xRZ5fDg8z92qGRnyfsqOams6f_d8xe7ufvGaPYjp7yLO7qegkpFGQBtK1L0tVW11XUJtSkXXWSSMtoaektAhpQtpoWFYmBSIra-_AJcqqSo3Z7V_vFzXRh6V_D_1uCMVm24d2WC4Qir1JMZgUe5Nib2I0StRWqV-B6VWO</recordid><startdate>19991201</startdate><enddate>19991201</enddate><creator>Jeitschko, Wolfgang</creator><creator>Mons, Horst A.</creator><creator>Rodewald, Ute Ch</creator><general>Verlag der Zeitschrift für Naturforschung</general><scope/></search><sort><creationdate>19991201</creationdate><title>Preparation and Crystal Structure of the Calcium Rhenate(VI, VII) Ca5Re3O15-x</title><author>Jeitschko, Wolfgang ; Mons, Horst A. ; Rodewald, Ute Ch</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-s207t-a40a4febb3f84fc0f5b3a89892528a1ea6b81076a4540dc570aa82fe9096383c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Crystal Structure</topic><topic>Mixed Valence</topic><topic>Perrhenates</topic><topic>Rhenates</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jeitschko, Wolfgang</creatorcontrib><creatorcontrib>Mons, Horst A.</creatorcontrib><creatorcontrib>Rodewald, Ute Ch</creatorcontrib><jtitle>Zeitschrift für Naturforschung. B, A journal of chemical sciences</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jeitschko, Wolfgang</au><au>Mons, Horst A.</au><au>Rodewald, Ute Ch</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Preparation and Crystal Structure of the Calcium Rhenate(VI, VII) Ca5Re3O15-x</atitle><jtitle>Zeitschrift für Naturforschung. B, A journal of chemical sciences</jtitle><date>1999-12-01</date><risdate>1999</risdate><volume>54</volume><issue>12</issue><spage>1483</spage><epage>1488</epage><pages>1483-1488</pages><issn>0932-0776</issn><eissn>1865-7117</eissn><abstract>The title compound was prepared by reaction of elemental calcium with the calcium metaperrhenate Ca(ReO
. Its crystal structure was determined from single-crystal X-ray data: Amm2, a = 560.31 (5)pm, b = 1572.4( 1)pm, c = 719.91 (6)pm ,Z = 2 ,R = 0.033 for 930 structure factors and 46 variable parameters. The calcium atoms occupy three atomic sites, all with seven oxygen neighbors. Of the two different rhenium atoms one has square-pyramidal oxygen coordination with an average oxidation number +6.25. The other rhenium site (oxidation number +7) was refined as a split position with trigonal-bipyramidal (75%) and tetrahedral oxygen coordination (25%). One oxygen site remains unoccupied, whenever the tetrahedral rhenium site is occupied, resulting in the composition Ca
Re
. A test for superconductivity of this black compound down to 1.5 K was negative.</abstract><pub>Verlag der Zeitschrift für Naturforschung</pub><doi>10.1515/znb-1999-1201</doi><tpages>6</tpages></addata></record> |
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| language | eng |
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| source | Alma/SFX Local Collection |
| subjects | Crystal Structure Mixed Valence Perrhenates Rhenates |
| title | Preparation and Crystal Structure of the Calcium Rhenate(VI, VII) Ca5Re3O15-x |
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