New phase in the Bi-Sr-Ca-Cu-O system

被引：1
|
作者：
Kozeeva, LP [1 ]
Kameneva, MY [1 ]
Podberezskaya, NV [1 ]
Vasiieva, IG [1 ]
Kuratieva, NV [1 ]
Naumov, DY [1 ]
Nadolinnyi, VA [1 ]
Fedorov, VE [1 ]
机构：
[1] Russian Acad Sci, Siberian Branch, AV Nikolaev Inst Inorgan Chem, Novosibirsk, Russia
来源：
JOURNAL OF STRUCTURAL CHEMISTRY | 2004年 / 45卷 / 02期
关键词：
crystallization from a melt; Bi-Sr-Ca-Cu-O system; XRPA; DTA; EPR;
D O I：
10.1023/B:JORY.0000048875.49302.f4
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Cooling a melt of a Bi-Sr-Ca-Cu-O system (Bi:Sr:Ca:Cu=4:3:3:4 or 2:2:2:4) from 1000degreesC-1050degreesC yielded crystals of a new red-colored nonsuperconducting phase, accompanying the superconducting 2212 and 2201 phases. Based on the EPR spectra, it was concluded that copper is univalent in this compound. The new phase has a composition Bi2.2Sr1.6Ca1.3Cu2Ox. The X-ray diffraction pattern has been indexed, and the unit cell parameters of the phase have been determined: space group P2/m, a = 12.93, b = 4.55, c = 10.94 Angstrom; beta = 102.72degrees.
引用
收藏
页码：253 / 261
页数：9
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