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2007200520

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eeqeeq0002(½ð±Ò+3):лл¡¡²ÎÓë 2010-08-24 15:52:29
2007200520(½ð±Ò+20):¶àл°ïÖú 2010-09-03 11:52:39
*data for   ICSD #157767
Coll Code   157767
Rec  Date   2008/02/01
Chem Name   Titanium Aluminium Carbide (2/1/1)
Structured  Ti2 Al C
Sum         C1 Al1 Ti2
ANX         NOP2
D(calc)     4.44
Title       Structural and elastic properties of Zr2 Al X and Ti2 Al X (X = C and
            N) under pressure effect
Author(s)   Bouhemadou, A.;Khenata, R.;Chegaar, M.
Reference   The European Physical Journal B
            (2007), 56, 209-215
Unit Cell   2.96801 2.96801 13.22376 90. 90. 120.
Vol         100.88
Z           2
Space Group P 63/m m c
SG Number   194
Cryst Sys   hexagonal
Pearson     hP8
Wyckoff     f d a
Red Cell    P  2.968 2.968 13.223 90 90 120 100.882
Trans Red   1.000 0.000 0.000 / 0.000 1.000 0.000 / 0.000 0.000 1.000
Comments    The authors give formulae for the computation of the
            lattice constants and the parameter z in the range 0-20 GPa
            (here below)
            a=a(0 Gpa)*(1 -0.00188 * P(Gpa) +0.000010944 * P^2(GPa))
            c=c(0 GPa)*(1 -0.00228 * P(GPa) + 0.000020069 * P^2(GPa))
            z = z(0 GPa) + 0.0002848 * P(GPa) - 0.000002597 * P^2(GPa))
            Angenommen, bei P=0 stimmen die Werte von Ref.24 (a=3.07,
            c=13.74, z=0.0835); (nicht in ICSD!)
            Pressure in MPa: 20000
            Structure calculated theoretically
            Structure type : AlCr2C
            X-ray diffraction from single crystal
            No R value given in the paper.
            At least one temperature factor missing in the paper.
Atom  #   OX   SITE      x           y           z           SOF      H
C    1  +0    2 a   0.          0.          0.             1.         0   
Al   1  +0    2 d   0.3333      0.6667      0.750          1.         0   
Ti   1  +0    4 f   0.3333      0.6667      0.08816        1.         0   
*end for    ICSD #157767
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