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Volume 9 - March 1994

Contents

Page 4 of 4

Research Article

  • Rietveld analysis of high-density polyethylene

  • Sampath S. Iyengar, Simona Percec
  • Published online by Cambridge University Press:
    10 January 2013, pp. 217-220

  • Wide angle X-ray powder diffraction data from unoriented and uniaxially oriented films of high-density polyethylene were analyzed by the Rietveld whole pattern profile fitting technique. A Voigt function was used to model the profile and extract crystallographic information such as the unit cell dimensions, crystallite size and strain, and degree of orientation. The analysis revealed that the technique was efficient in providing not only accurate unit cell dimensions without an internal standard, but also crystallite size and strain information. The oriented films were also successfully modeled with this technique.

International Report

Research Article

  • Thermal expansion coefficients and Gruneisen parameters of quartz at high temperature by X-ray method

  • Nabil N. Rammo, Saad B. Farid
  • Published online by Cambridge University Press:
    10 January 2013, pp. 148-150

  • The temperature variation of the interplanar spacings (101), (112), and (211) of 325 mesh quartz was determined in the range 300–966 °K using X-ray powder diffractometry. The measured lattice parameters have been found to increase nonlinearly with temperature, and the dependence has been expressed by a polynomial of second degree from the least-squares fitting of the data, the results of which are presented herein. Values are given for the thermal expansion coefficients and Gruneisen parameter in the range 300 to 768 °K. In the range 768–966 °K, the expansion is zero. The derivatives dαa/dT, dαc/dT, and dαv/dT at ambient temperature are also given.

Index to Volume 9

International Report

  • Calendar of Meetings

  • Published online by Cambridge University Press:
    10 January 2013, pp. 151-152
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  • Calendar of Meetings

  • Published online by Cambridge University Press:
    10 January 2013, p. 221
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Front matter

  • PDJ volume 9 issue 4 Cover and Front matter

  • Published online by Cambridge University Press:
    10 January 2013, pp. f1-f6
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International Report

Other

International Report

Other

Back matter

  • PDJ volume 9 issue 4 Cover and Back matter

  • Published online by Cambridge University Press:
    10 January 2013, pp. b1-b4
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International Report

Front matter

  • PDJ volume 9 issue 2 Cover and Front matter

  • Published online by Cambridge University Press:
    10 January 2013, pp. f1-f10
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  • PDJ volume 9 issue 1 Cover and Front matter

  • Published online by Cambridge University Press:
    10 January 2013, pp. f1-f8
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Other

Back matter

  • PDJ volume 9 issue 2 Cover and Back matter

  • Published online by Cambridge University Press:
    10 January 2013, pp. b1-b3
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  • PDJ volume 9 issue 1 Cover and Back matter

  • Published online by Cambridge University Press:
    10 January 2013, pp. b1-b2
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Front matter

  • PDJ volume 9 issue 3 Cover and Front matter

  • Published online by Cambridge University Press:
    10 January 2013, pp. f1-f8
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Back matter

  • PDJ volume 9 issue 3 Cover and Back matter

  • Published online by Cambridge University Press:
    10 January 2013, pp. b1-b3
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Page 4 of 4