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zhleile200(½ð±Ò+1):лл£¬¾¡¹Ü²»ÊÇÎÒÒªµÄ£¬»¹ÊǷdz£¸Ðл£¡ 2010-08-24 19:06:06
ICSDÀïÖ»ÓÐBa2 Pb O4£¬¹©Äã²Î¿¼
*data for   ICSD #66543
Coll Code   66543
Rec  Date   1994/01/19
Chem Name   Dibarium Lead(IV) Oxide
Structured  Ba2 Pb O4
Sum         Ba2 O4 Pb1
ANX         AB2X4
D(calc)     7.42
Title       Time-of-flight powder neutron diffraction study of the structure
            ofBa2PbO4
Author(s)   Rosseinsky, M.J.;Prassides, K.
Reference   Acta Crystallographica C (39,1983-)
            (1991), 47, 2519-2522
Unit Cell   4.29650(2) 4.29650(2) 13.2285(1) 90. 90. 90.
Vol         244.2
Z           2
Space Group I 4/m m m
SG Number   139
Cryst Sys   tetragonal
Pearson     tI14
Wyckoff     e2 c a
R Value     .026
Red Cell    I  4.296 4.296 7.278 107.166 107.166 89.999 122.098
Trans Red   1.000 0.000 0.000 / 0.000 -1.000 0.000 / -0.500 0.500 -0.500
Comments    Neutron diffraction (powder)
            The structure has been assigned a PDF number (calculated
            powder diffraction data): 01-079-1543
            Rietveld profile refinement applied
            Temperature in Kelvin: 5
            Structure type : K2MgF4
            At least one temperature factor is implausible or
            meaningless but agrees with the value given in the paper.
Atom  #   OX   SITE      x           y           z           SOF      H        ITF(U)   
Ba   1  +2    4 e   0           0           0.3554(1)      1.         0         0.39(5)
Pb   1  +4    2 a   0           0           0              1.         0         0.12(4)
O    1  -2    4 e   0           0           0.1619(1)      1.         0         0.84(6)
O    2  -2    4 c   0           0.5         0              1.         0         0.56(5)
*end for    ICSD #66543
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