A SERIES OF CRYSTAL STRUCTURES OF SUPERCONDUCTING PHASES IN TI-Ba-Ca-Cu-O SYSTEM
A series of superconducting phases has been synthesized by powder sintering in T1-Ba-Ca-Cu-O system and the crystal structures of these superconducting phases have been determined with the X-ray powder diffraction method. All of these superconducting phases belong to the tetragonal symmetry. They ha...
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| Veröffentlicht in: | 中国科学：数学英文版 1989 (7), p.826-835 |
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| container_title | 中国科学：数学英文版 |
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| creator | 梁敬魁 张玉苓 黄久齐 解思深 车广灿 成向荣 |
| description | A series of superconducting phases has been synthesized by powder sintering in T1-Ba-Ca-Cu-O system and the crystal structures of these superconducting phases have been determined with the X-ray powder diffraction method. All of these superconducting phases belong to the tetragonal symmetry. They have the same lattice constant α but a different lattice constant c. The crystal structures of these superconducting phases are composed of two units, i. e. intercalation （single T1-Olayer or double T1-O layers） and oxygen deficient pseudo-perovskite unit Ba2Can-1CunO2n+1 （n is an integer）. These superconducting phases can be divided into two types. Type Ⅰcontains only one single T1-O layer as an intercalation with primary tetragonal lattice and space group P4/mmm. Type Ⅱ contains two T1-O layers in an intercalation with a body-centered tetragonal lattice and space group I4/mmm. The chemical formulas of Type Ⅰand Type Ⅱcan be generalized as TIBa2 Can-1 CunO2n+2.5 （n=1, 2, 3, 4） and T12Ba2 |
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All of these superconducting phases belong to the tetragonal symmetry. They have the same lattice constant α but a different lattice constant c. The crystal structures of these superconducting phases are composed of two units, i. e. intercalation （single T1-Olayer or double T1-O layers） and oxygen deficient pseudo-perovskite unit Ba2Can-1CunO2n+1 （n is an integer）. These superconducting phases can be divided into two types. Type Ⅰcontains only one single T1-O layer as an intercalation with primary tetragonal lattice and space group P4/mmm. Type Ⅱ contains two T1-O layers in an intercalation with a body-centered tetragonal lattice and space group I4/mmm. The chemical formulas of Type Ⅰand Type Ⅱcan be generalized as TIBa2 Can-1 CunO2n+2.5 （n=1, 2, 3, 4） and T12Ba2</description><identifier>ISSN: 1674-7283</identifier><identifier>EISSN: 1869-1862</identifier><language>eng</language><subject>crystal ; high ; phase ; structure ; superconducting ; system ; T ; TI-Ba-Ca-Cu-O</subject><ispartof>中国科学：数学英文版, 1989 (7), p.826-835</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/60114X/60114X.jpg</thumbnail><link.rule.ids>314,780,784,4024</link.rule.ids></links><search><creatorcontrib>梁敬魁 张玉苓 黄久齐 解思深 车广灿 成向荣</creatorcontrib><title>A SERIES OF CRYSTAL STRUCTURES OF SUPERCONDUCTING PHASES IN TI-Ba-Ca-Cu-O SYSTEM</title><title>中国科学：数学英文版</title><addtitle>SCIENCE CHINA Mathematics</addtitle><description>A series of superconducting phases has been synthesized by powder sintering in T1-Ba-Ca-Cu-O system and the crystal structures of these superconducting phases have been determined with the X-ray powder diffraction method. All of these superconducting phases belong to the tetragonal symmetry. They have the same lattice constant α but a different lattice constant c. The crystal structures of these superconducting phases are composed of two units, i. e. intercalation （single T1-Olayer or double T1-O layers） and oxygen deficient pseudo-perovskite unit Ba2Can-1CunO2n+1 （n is an integer）. These superconducting phases can be divided into two types. Type Ⅰcontains only one single T1-O layer as an intercalation with primary tetragonal lattice and space group P4/mmm. Type Ⅱ contains two T1-O layers in an intercalation with a body-centered tetragonal lattice and space group I4/mmm. 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All of these superconducting phases belong to the tetragonal symmetry. They have the same lattice constant α but a different lattice constant c. The crystal structures of these superconducting phases are composed of two units, i. e. intercalation （single T1-Olayer or double T1-O layers） and oxygen deficient pseudo-perovskite unit Ba2Can-1CunO2n+1 （n is an integer）. These superconducting phases can be divided into two types. Type Ⅰcontains only one single T1-O layer as an intercalation with primary tetragonal lattice and space group P4/mmm. Type Ⅱ contains two T1-O layers in an intercalation with a body-centered tetragonal lattice and space group I4/mmm. The chemical formulas of Type Ⅰand Type Ⅱcan be generalized as TIBa2 Can-1 CunO2n+2.5 （n=1, 2, 3, 4） and T12Ba2</abstract></addata></record> |
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| identifier | ISSN: 1674-7283 |
| ispartof | 中国科学：数学英文版, 1989 (7), p.826-835 |
| issn | 1674-7283 1869-1862 |
| language | eng |
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| source | Alma/SFX Local Collection |
| subjects | crystal high phase structure superconducting system T TI-Ba-Ca-Cu-O |
| title | A SERIES OF CRYSTAL STRUCTURES OF SUPERCONDUCTING PHASES IN TI-Ba-Ca-Cu-O SYSTEM |
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