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Mineralogical Magazine and Journal of the Mineralogical Society, Volume 35 - March 1965

Contents

Page 7 of 10

Short Communications

Book Notices

Book Reviews

Front matter

  • MMA volume 35 issue 274 Cover and Front matter

  • Published online by Cambridge University Press:
    14 March 2018, p. f1
    • Article
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Short Communications

Book Reviews

Research Article

  • An electron-microscope study of peristerite plagioclases

  • S. G. Fleet, P. H. Ribbe
  • Published online by Cambridge University Press:
    14 March 2018, pp. 165-176

  • Plagioclase feldspars in the peristerite range An2-An17 have been investigated by transmission electron-microscopy and electron diffraction. All except the more anorthite-rich specimens were found to be unmixed into albite and oligoclase lamellae, between a few hundred and several thousand Å thick and approximately parallel to . A discussion is given of the part played by these lamellae when optical schiller is exhibited; and the effect of heat treatment on the lamellar structure and optical schiller is described.

Short Communications

Book Reviews

Front matter

  • MMA volume 35 issue 272 Cover and Front matter

  • Published online by Cambridge University Press:
    14 March 2018, p. f1
    • Article
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Research Article

  • Enhanced production of magnesium silicates from strained magnesia1

  • W. F. Bush, W. O. Williamson
  • Published online by Cambridge University Press:
    14 March 2018, pp. 177-188

  • Mechanically strained, in contrast to annealed, MgO produced greater yields of forsterite and protoenstatite by solid-state reaction with a quartz–cristobalite mixture at 1200–1400° C. The specific surfaces of the strained and of the annealed MgO were similar. The strained MgO was more hygroscopic and similarity of the surface free energies was thus unlikely. The difference in the amounts of silicates produced from the two types of MgO decreased as the temperatures of synthesis increased. This was ascribed to loss of strain energy by unavoidable annealing before and after these temperatures had been reached.

    Similar results were obtained when hydrated silica was substituted for the quartz-eristobalite mixture, but more forsterite was produced.

Book Reviews

Short Communications

Other

Short Communications

Book Reviews

Front matter

  • MMA volume 35 issue 271 Cover and Front matter

  • Published online by Cambridge University Press:
    14 March 2018, p. f1
    • Article
      • You have access
    • PDF
    • Export citation

Page 7 of 10