Compounds and phase compatibilities in the system La2O3SrOCuO at 950°C

Leeuw, D.M. de; Mutsaers, C.A.H.A.; Geelen, G.P.J.; Langereis, Cor G.

doi:10.1016/0022-4596(89)90090-x

Cited by 67 publications

(25 citation statements)

References 33 publications

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“…A slightly different value of x=0.20 is found for the lower limit in Ref. [280]. The phase is formed in an oxygen atmosphere at 950~ and represents an oxygen-deficient perovskite with structural [281] ordering over 8 single-perovskite units (a=ap2~/2-) {(Lao.sSro.2)sCusO19.g P4/mbra; 1084.0(4), 386.1(2)}, forming corner-sharing Cu-coordination octahedra, pyramids and squares [281,288,289].…”

Section: B Systems Re(o)-sr(o)--cu(o)mentioning

confidence: 83%

“…The phase diagram [277,278] [269]; c -La(Sri-yLay)2Cu205 +w (0.025 <y < 0.075) [280] occurs, and no Y, Sr solid solubility is seen in the fixed-valence compounds Y2Cu205 and o-SrCuO2 + w, whereas a significant portion of Sr in Sq4Cu24041--w can be replaced by yttrium. The pseudoternary phase diagram for the La(O)--Sr(O)--Cu(O) system is compiled from literature data, [199,269,277,[279][280][281] as expected to look at 950~ in oxygen, and is shown in Fig, 30. Of the strontium cuprates, only Sr14Cu24041 exhibits a significant La for Sr solid solubility (up to 36%) [280].…”

Section: B Systems Re(o)-sr(o)--cu(o)mentioning

confidence: 96%

“…Of the strontium cuprates, only Sr14Cu24041 exhibits a significant La for Sr solid solubility (up to 36%) [280]. The K2NiF4-related structure of lanthanum cuprate has a broad homogeneity range with respect to Sr, up to x=0.75 in (Laj_xSrx)2CuO4 [280]. A change into the tetragonal K2NiF4-type structure occurs as a consequence of the Sr for La substitution, with a critical concentration of x=0.04 as seen [282][283][284] by PXD at room temperature {(Lao.92~Sro.07.~2CuO4; 14/mmm; 377.17 (8), 1322.6(3)} [285].…”

Section: B Systems Re(o)-sr(o)--cu(o)mentioning

confidence: 99%

“…The pseudoternary phase diagram for the La(O)--Sr(O)--Cu(O) system is compiled from literature data, [199,269,277,[279][280][281] as expected to look at 950~ in oxygen, and is shown in Fig, 30. Of the strontium cuprates, only Sr14Cu24041 exhibits a significant La for Sr solid solubility (up to 36%) [280]. The K2NiF4-related structure of lanthanum cuprate has a broad homogeneity range with respect to Sr, up to x=0.75 in (Laj_xSrx)2CuO4 [280].…”

Section: B Systems Re(o)-sr(o)--cu(o)mentioning

confidence: 99%

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Phase diagrams for the YBa2Cu3O7 family — ANNO 1996

Karen

Kjekshus

1997

Journal of Thermal Analysis

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Phase diagrams for cupratcs of alkaline earth and rare earth elements are presented, covering binary to quintenary oxides and including selected solid solution series with other elements. Elementary crystal chemical data are included for identification of the occurring phases. Chemical stability is discussed with respect to the high-temperature reactions with Lewis acids like CO2, protons, etc. Particularly the occurrence of oxide carbonates is consistently pointed out as one of the possible reasons for contradictory results in phase diagrams which comprise oxides with high basicity.

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Section: B Systems Re(o)-sr(o)--cu(o)mentioning

confidence: 83%

Section: B Systems Re(o)-sr(o)--cu(o)mentioning

confidence: 96%

Section: B Systems Re(o)-sr(o)--cu(o)mentioning

confidence: 99%

Section: B Systems Re(o)-sr(o)--cu(o)mentioning

confidence: 99%

See 2 more Smart Citations

Phase diagrams for the YBa2Cu3O7 family — ANNO 1996

Karen

Kjekshus

1997

Journal of Thermal Analysis

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“…7 диаграммах отсутствует, хотя по данным многих работ, в том числе [89, 81, В системе La -Sr -Сu -О идентифицированы бинарные со-единения и тройное соединение [96,97]. Субсолидусная фазовая диаграмма при 950 °С и давлении кислорода 1 б исследована в работе [96]. Авторы выделили новое тройное соединение с параметрами элементарной ячей-ки а = 3,80 логичные структуры образуют редкоземельные элементы Sm, Eu, Gd.…”

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