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On the Structure-Planes of Corundum

Published online by Cambridge University Press:  14 March 2018

John W. Judd
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Extract

While examining the fine series of corundums brought from Burma by Mr. C. Barrington Brown, F.G.S., and comparing them with specimens obtained from Ceylon, Southern India, the United States. and other localities, I have been led to devote especial attention to the curious " parting-planes " which are sometimes found in crystals of this mineral, but which, in other cases, appear to be entirely wanting. In making these comparisons, I have had the great advantage of being able to refer to the fine collection of corundums in the British Museum (Natural History) at South Kensington, and have to gratefully acknowledge the advice and assistance which have been so freely afforded to me at all times by Mr. Fletcher and Mr. Miers.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 11 , Issue 50 , September 1895 , pp. 49 - 55
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1895

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References

page 50 note 1 Zeitsch. d. d. geolog. Gesellsch Vol. XXVL (1874), pp. 186-193.

page 50 note 2 Lehrbuch der Mineralogie. 1st Ed. (1883), p.

page 50 note 3 System of Mineralogy, 6th Ed. (1892), p. 211.

page 50 note 4 Description of the Corundum Stone and its varieties, &c. Phil. Trans., XCII. (1802), pp. 283-326.

page 51 note 1 Neue.s Jahrb.für Min., &c., 1884, I. 220.

page 51 note 2 Zeitschr.für Krystall. X. (1885), pp. 351, 353, 364.

Techermak has in some cases proved the needles present in corundum to be rutile, by their tetragonal symmetry and their prism angles, l.c,, p. 364

page 53 note 1 Neues Jahrb.flir Min., 1886, I., p. 147.

page 53 note 2 Zeits.für Krystall., X. (1885), pp. 364-5.