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The structure of baddeleyite and of prepared zirconia

Published online by Cambridge University Press:  14 March 2018

Kathleen Yardley
Kathleen Yardley*
Affiliation:
Davy-Faraday Laboratory, Royal Institution of Great Britain
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Extract

The crystal used in the first part of this investigation, an untwinned specimen from Ceylon in the British Museum collection, was measured goniometrically and described in detail by Dr. G. F. Herbert Smith, who gave as its crystallographic constants :

Density (p) 5.82 (grs./c.c.). Monoelinic prismatic,

a:b:c = 0.9905 : 1:0.5110, β = 80° 32'.

Owing to the comparatively largc size of the crystal and its high absorptive power it was unsuited either to the 'rotating crystal' or Laue photographic methods of X-ray examination, Reflections from the faces were observed on the Bragg ionization spectrometer and spacings measured with an accuracy of about 2 per cent.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 21 , Issue 115 , December 1926 , pp. 169 - 175
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1926

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References

page 169 note 1 Blake, G. S. and Smith, G. F. H., Min. Mag., 1007, vol. 14, p. 378, fig. 2.Google Scholar.

page 169 note 2 Fletcher, L., Min. Mag., 1893, vol.10, p. 14 Google Scholar.

page 171 note 1 Hussak, E., Neues Jahrb. Min., 1892, vol. ii, p. 141 Google Scholar ; TscTiermaks Min. Petr. Mitt., 1895, vol. 14, p. 406.

page 171 note 2 Hussak, E. and Eeitinger, J., Zeits. Kryst. Min., 1903, vol. 37, p. 572 Google Scholar. ‘Brazilito’ and some other names have been applied to this material (Min. Mag., 1919, vol. 18, p. 375.)

page 173 note 1 P. Niggli, Geometrische Kristallographie des Diskontinuums, Leipzig, 1919 ; also Astbury, W. T. and Yardley, K., Phil. Trans. Roy. Soc. London, Ser. A, 1924, vol. 224, p. 22 Google Scholar.

page 173 note 2 A. E. Nordenskiöld, Ofvers. K. Vetens.-Akad. Förh. Stockholm, 1861, vol. 17 (for 1860), p. 450 ; Ann. Phys. Chem. (Poggendorff), 1861, vol. 114, p. 625. “W. Florence (Neues .Tahrb. Min., 1898, vol. ii, p. 126), who also prepared crystals of zirconia in borax beads, suggested that these might be monoclinie.

page 174 note 1 Wasastjerna, J. A., Comm. Phys.-Math. Soc. Sci. Fennicae, 1923, vol. 1, no. 38, p. 20 Google Scholar.

page 174 note 2 Bragg, W. L. and Brown, G. B., Proc. Roy. Soc. London, Ser. A, 1926, vol. 110, p. 34.Google Scholar

page 174 note 3 Vegard, L., Phil. Mag., 1926, ser. 7, vol. 1, p. 1151 CrossRefGoogle Scholar.

page 174 note 4 Goldschmidt, V. M. and Thomassen, L., Vidensk. Skrifter, I. Mat.-naturvid. Kl., Kristiania, 1923, no. 2, p. 5. [Min. Abstr., vol. 2, p. 206].Google Scholar

page 175 note 1 Davey, W. P., Bull. Amer. Physical Soc, 1926, vol. 1, no. 9, p. 2.Google Scholar