TY - JOUR
T1 - Structural Study on High-TcSuperconductor Bi2-x(Ca, Sr)3Cu2+xO9-y
AU - Kajitani, Tsuyoshi
AU - Kusaba, Keiji
AU - Kikuchi, Masae
AU - Kobayashi, Norio
AU - Syono, Yasuhiko
AU - Williams, Timothy B.
AU - Hirabayashi, Makoto
PY - 1988/1/1
Y1 - 1988/1/1
N2 - The crystal structure of the high-TcBi2-x(Ca, Sr)3Cu2+xO9-ywith x=0.2 and y=0.78 was studied by means of neutron and X-ray powder diffraction. Since the unit cell parameters were relatively large for powder diffraction analysis, an averaged structure was refined, assuming an orthorhombic sub-cell (a=5.39 Å, b=5.39 Å and c=30.37 Å) which corresponds to 1/5 of the unit cell: This is a derivative of Bi4Ti3O12The double perovskite unit interleaved by the double bismuthlayers is B-type, i.e. a CuO6octahedron is surrounded by eight alkaline earth metal ions. The pyramidal CuO5configuration is found in this oxide. The copper valency is estimated at about 2.3 on the basis of the determined chemical composition.
AB - The crystal structure of the high-TcBi2-x(Ca, Sr)3Cu2+xO9-ywith x=0.2 and y=0.78 was studied by means of neutron and X-ray powder diffraction. Since the unit cell parameters were relatively large for powder diffraction analysis, an averaged structure was refined, assuming an orthorhombic sub-cell (a=5.39 Å, b=5.39 Å and c=30.37 Å) which corresponds to 1/5 of the unit cell: This is a derivative of Bi4Ti3O12The double perovskite unit interleaved by the double bismuthlayers is B-type, i.e. a CuO6octahedron is surrounded by eight alkaline earth metal ions. The pyramidal CuO5configuration is found in this oxide. The copper valency is estimated at about 2.3 on the basis of the determined chemical composition.
KW - Ca-Sr-Bi-Cu superconductor
KW - Neutron diffraction
KW - Structure determination
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=0024000136&partnerID=8YFLogxK
U2 - 10.1143/JJAP.27.L587
DO - 10.1143/JJAP.27.L587
M3 - Article
AN - SCOPUS:0024000136
VL - 27
SP - L587-L590
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
SN - 0021-4922
IS - 4A
ER -