Published online by Cambridge University Press: 14 March 2018
The pyroxmangite and rhodonite, here examined by X-ray methods, are from the Lewisian schists at Glen Beag, in the Glenelg district, Inverness-shire. The material was exhibited by Prof. C. E. Tilley at the meeting of the Society on November 5, 1936, and it has since been described by him. The specimen of ‘iron-rhodonite’ was from the iron slag described by Whiteley and Hallimond, and is no. 7a in their table of analyses.
The unit cell of the ‘iron-rhodonite’ was determined by means of the Weissenberg goniometer and the data obtained are compared in table I with Gossner and Brückl's determination for rhodonite. The unit cell of pyroxmangite was determined by taking a Weissenberg photograph about the c-axis and oscillation photographs about the a- and b-axes.
Page 573 note 1 Tilley, C. E., Amer. Min., 1937, vol. 22, p. 720.Google Scholar [Min. Abstr. 6-528.]
Page 573 note 2 Whiteley, J. H. and Hallimond, A. F., Journ. Iron and Steel Inst., London, 1919, vol. 99, p. 201.Google Scholar [M.A. 1-164.]
Page 573 note 3 Gossner, B. and Brückl, K., Centr. Min., Abt. A, 1928, p. 316.Google Scholar [M.A. 4-108.]
Page 574 note 1 Tunell, G. in Henderson, E. P. and Glass, J. J., Amer. Min., 1936, vol. 21, p. 293.Google Scholar [M.A. 6-528.]