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The crystallography of Vogtite, an anorthic metasilicate of iron, calcium, manganese, and magnesium, from acid steel-furaace slags

Published online by Cambridge University Press:  14 March 2018

A. F. Hallimond
A. F. Hallimond*
Affiliation:
Museum of Practical Geology, London
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Extract

The substance was met with in the course of work on steel-furnace slags, a general account of which has been communicated to the Iron and Steel Institute. These slags were for the most part melts consisting principally of the three oxides FeO, MnO, and SiO2, and yielded the silicates fayalite and rhodonite. The small amount of calcium silicate usually present is held in isomorphous solid solution ill these silicates, but when the amount of lime exceeds about eight per cent. a new silicate appears, which does not seem to belong to any of the known mineral groups.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 18 , Issue 87 , November 1919 , pp. 368 - 372
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1919

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References

page 368 note 1 'The acid hearth and slag,' by J. H. Whiteley and A. F. Halllmond (read May 10, 1919).

page 371 note 1 Hlawatesh, C., 'Eine trikline, rhodonitähnliche Schlacke.' Zeits. Kryst. Min, 1907, vol. xlii, pp. 590–593 Google Scholar.

page 372 note 1 Two anorthic minerals resembling rhodonite have recently been described, namely pyroxmangite (W. E. Ford and W. M. Bradley, Amer. Journ. Sol., 1913, ser. 4, vol. xxxvi, p. 169), and se~bralite (J. Palmgren, Bull. Geol. Inst. Univ. Upsala, 1917, vol. xiv, p. 173). These are considerably denser than vogtite, and the optical schemes given by Falmgren have nothing in common with that for this substance.