Polytypic modifications in heavily Tb and Eu doped gadolinium aluminum borate crystals
The evidence of a new polytypic phase was demonstrated in double doped gadolinium aluminum borate (GAB) crystals grown by the high temperature top seeded solution growth (HTTSSG) method. The structures of the rhombohedral and the new monoclinic phases in the Eu0.02Tb0.12Gd0.86Al3(BO3)4 and Eu0.18Tb0...
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| Veröffentlicht in: | Journal of crystal growth 2012-07, Vol.351 (1), p.72-76 |
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| container_title | Journal of crystal growth |
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| creator | Beregi, E. Sajó, I. Lengyel, K. Bombicz, P. Czugler, M. Földvári, I. |
| description | The evidence of a new polytypic phase was demonstrated in double doped gadolinium aluminum borate (GAB) crystals grown by the high temperature top seeded solution growth (HTTSSG) method. The structures of the rhombohedral and the new monoclinic phases in the Eu0.02Tb0.12Gd0.86Al3(BO3)4 and Eu0.18Tb0.19Gd0.63Al3(BO3)4 compositions were determined by single crystal and powder X-ray diffraction methods. The monoclinic crystals with different compositions have identical structures with space group C2/c. It was concluded that the starting crystallization temperature was the dominant factor in formation of the rhombohedral and monoclinic phases. The crystals with non-centrosymmetric rhombohedral structure (R32) may possess similar compositions as the previous ones but their starting crystallization temperature was lower.
► Polytypic modifications of Eu and Tb codoped GAB crystals have been found. ► Symmetry has been reduced with increasing crystallization temperature (Tcr). ► Number of molecules per unit cell has been increased with growing Tcr. |
| doi_str_mv | 10.1016/j.jcrysgro.2012.04.031 |
| format | Article |
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► Polytypic modifications of Eu and Tb codoped GAB crystals have been found. ► Symmetry has been reduced with increasing crystallization temperature (Tcr). ► Number of molecules per unit cell has been increased with growing Tcr.</description><identifier>ISSN: 0022-0248</identifier><identifier>EISSN: 1873-5002</identifier><identifier>DOI: 10.1016/j.jcrysgro.2012.04.031</identifier><identifier>CODEN: JCRGAE</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>A1. Crystal structure ; A1. X-ray diffraction ; A2. Single crystal growth ; A2. Top seeded solution growth ; Aluminum ; B1. Borates ; B1. Rare earth compounds ; Borates ; Condensed matter: structure, mechanical and thermal properties ; Cross-disciplinary physics: materials science; rheology ; Crystal growth ; Crystal structure ; Crystallization ; Crystals ; Diffraction ; Exact sciences and technology ; Gadolinium ; Growth from solutions ; Materials science ; Methods of crystal growth; physics of crystal growth ; Physics ; Structure of solids and liquids; crystallography ; Structure of specific crystalline solids</subject><ispartof>Journal of crystal growth, 2012-07, Vol.351 (1), p.72-76</ispartof><rights>2012 Elsevier B.V.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c375t-293f4e3f0c3525c01dfa42c9ac2da3418e15d36de303a8534cf12526599d43d33</citedby><cites>FETCH-LOGICAL-c375t-293f4e3f0c3525c01dfa42c9ac2da3418e15d36de303a8534cf12526599d43d33</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jcrysgro.2012.04.031$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>315,782,786,3552,27931,27932,46002</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=26037513$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Beregi, E.</creatorcontrib><creatorcontrib>Sajó, I.</creatorcontrib><creatorcontrib>Lengyel, K.</creatorcontrib><creatorcontrib>Bombicz, P.</creatorcontrib><creatorcontrib>Czugler, M.</creatorcontrib><creatorcontrib>Földvári, I.</creatorcontrib><title>Polytypic modifications in heavily Tb and Eu doped gadolinium aluminum borate crystals</title><title>Journal of crystal growth</title><description>The evidence of a new polytypic phase was demonstrated in double doped gadolinium aluminum borate (GAB) crystals grown by the high temperature top seeded solution growth (HTTSSG) method. The structures of the rhombohedral and the new monoclinic phases in the Eu0.02Tb0.12Gd0.86Al3(BO3)4 and Eu0.18Tb0.19Gd0.63Al3(BO3)4 compositions were determined by single crystal and powder X-ray diffraction methods. The monoclinic crystals with different compositions have identical structures with space group C2/c. It was concluded that the starting crystallization temperature was the dominant factor in formation of the rhombohedral and monoclinic phases. The crystals with non-centrosymmetric rhombohedral structure (R32) may possess similar compositions as the previous ones but their starting crystallization temperature was lower.
► Polytypic modifications of Eu and Tb codoped GAB crystals have been found. ► Symmetry has been reduced with increasing crystallization temperature (Tcr). ► Number of molecules per unit cell has been increased with growing Tcr.</description><subject>A1. Crystal structure</subject><subject>A1. X-ray diffraction</subject><subject>A2. Single crystal growth</subject><subject>A2. Top seeded solution growth</subject><subject>Aluminum</subject><subject>B1. Borates</subject><subject>B1. Rare earth compounds</subject><subject>Borates</subject><subject>Condensed matter: structure, mechanical and thermal properties</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Crystal growth</subject><subject>Crystal structure</subject><subject>Crystallization</subject><subject>Crystals</subject><subject>Diffraction</subject><subject>Exact sciences and technology</subject><subject>Gadolinium</subject><subject>Growth from solutions</subject><subject>Materials science</subject><subject>Methods of crystal growth; physics of crystal growth</subject><subject>Physics</subject><subject>Structure of solids and liquids; crystallography</subject><subject>Structure of specific crystalline solids</subject><issn>0022-0248</issn><issn>1873-5002</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFUMtOwzAQtBBIlMIvIF-QuCSs7ThNbqCKl1QJDoWr5dpOcZTExU4q5e9x1MKVy84eZnZnBqFrAikBkt_Vaa38GLbepRQITSFLgZETNCPFgiUcgJ6iWZw0AZoV5-gihBogKgnM0Oe7a8Z-3FmFW6dtZZXsresCth3-MnJvmxGvN1h2Gj8OWLud0XgrtWtsZ4cWy2ZobReXjfOyN3gy0ssmXKKzKoK5OuIcfTw9rpcvyert-XX5sEoUW_A-oSWrMsMqUIxTroDoSmZUlVJRLVlGCkO4Zrk2DJgsOMtURSinOS9LnTHN2BzdHu7uvPseTOhFa4MyTSM744YgCLCC8oIv8kjND1TlXQjeVGLnbSv9GEliKlLU4rdIMRUpIBOxyCi8Of6QQcmm8rJTNvypaQ4xC5m83B94JgbeW-NFUNZ0ymjrjeqFdva_Vz-4fI0_</recordid><startdate>20120715</startdate><enddate>20120715</enddate><creator>Beregi, E.</creator><creator>Sajó, I.</creator><creator>Lengyel, K.</creator><creator>Bombicz, P.</creator><creator>Czugler, M.</creator><creator>Földvári, I.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20120715</creationdate><title>Polytypic modifications in heavily Tb and Eu doped gadolinium aluminum borate crystals</title><author>Beregi, E. ; Sajó, I. ; Lengyel, K. ; Bombicz, P. ; Czugler, M. ; Földvári, I.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c375t-293f4e3f0c3525c01dfa42c9ac2da3418e15d36de303a8534cf12526599d43d33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>A1. 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Rare earth compounds</topic><topic>Borates</topic><topic>Condensed matter: structure, mechanical and thermal properties</topic><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>Crystal growth</topic><topic>Crystal structure</topic><topic>Crystallization</topic><topic>Crystals</topic><topic>Diffraction</topic><topic>Exact sciences and technology</topic><topic>Gadolinium</topic><topic>Growth from solutions</topic><topic>Materials science</topic><topic>Methods of crystal growth; physics of crystal growth</topic><topic>Physics</topic><topic>Structure of solids and liquids; crystallography</topic><topic>Structure of specific crystalline solids</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Beregi, E.</creatorcontrib><creatorcontrib>Sajó, I.</creatorcontrib><creatorcontrib>Lengyel, K.</creatorcontrib><creatorcontrib>Bombicz, P.</creatorcontrib><creatorcontrib>Czugler, M.</creatorcontrib><creatorcontrib>Földvári, I.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Aluminium Industry Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of crystal growth</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Beregi, E.</au><au>Sajó, I.</au><au>Lengyel, K.</au><au>Bombicz, P.</au><au>Czugler, M.</au><au>Földvári, I.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Polytypic modifications in heavily Tb and Eu doped gadolinium aluminum borate crystals</atitle><jtitle>Journal of crystal growth</jtitle><date>2012-07-15</date><risdate>2012</risdate><volume>351</volume><issue>1</issue><spage>72</spage><epage>76</epage><pages>72-76</pages><issn>0022-0248</issn><eissn>1873-5002</eissn><coden>JCRGAE</coden><abstract>The evidence of a new polytypic phase was demonstrated in double doped gadolinium aluminum borate (GAB) crystals grown by the high temperature top seeded solution growth (HTTSSG) method. The structures of the rhombohedral and the new monoclinic phases in the Eu0.02Tb0.12Gd0.86Al3(BO3)4 and Eu0.18Tb0.19Gd0.63Al3(BO3)4 compositions were determined by single crystal and powder X-ray diffraction methods. The monoclinic crystals with different compositions have identical structures with space group C2/c. It was concluded that the starting crystallization temperature was the dominant factor in formation of the rhombohedral and monoclinic phases. The crystals with non-centrosymmetric rhombohedral structure (R32) may possess similar compositions as the previous ones but their starting crystallization temperature was lower.
► Polytypic modifications of Eu and Tb codoped GAB crystals have been found. ► Symmetry has been reduced with increasing crystallization temperature (Tcr). ► Number of molecules per unit cell has been increased with growing Tcr.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jcrysgro.2012.04.031</doi><tpages>5</tpages></addata></record> |
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| subjects | A1. Crystal structure A1. X-ray diffraction A2. Single crystal growth A2. Top seeded solution growth Aluminum B1. Borates B1. Rare earth compounds Borates Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Crystal growth Crystal structure Crystallization Crystals Diffraction Exact sciences and technology Gadolinium Growth from solutions Materials science Methods of crystal growth physics of crystal growth Physics Structure of solids and liquids crystallography Structure of specific crystalline solids |
| title | Polytypic modifications in heavily Tb and Eu doped gadolinium aluminum borate crystals |
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