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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
eeqeeq0002(½ð±Ò+3):лл¡¡²ÎÓë 2010-08-24 15:52:29
2007200520(½ð±Ò+20):¶àл°ïÖú 2010-09-03 11:52:39
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*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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