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V.―Note on Artificial crystals of “Specular Iron” formed in a Copper Works Slag

Published online by Cambridge University Press:  14 March 2018

W. Terrible
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Extract

Since my last communication on Artificial crystals (Min. Mag. No. 19), I have met with some very remarkable crystals formed in a Copper Works Slag which consisted mainly of Cuprous Oxide and Ferric Oxide with a little lime, a product from melting a charge of “copper precipitate.”

The crystals are hexagonal plates, bounded on the edges by the faces of a rhombohedron which roughly measured gives an angle of R : R=86° They arc iron black in color, with a splendent metallic lustre, and contain 50% Ferric Oxide with 45% copper.

Examined under the microscope or even with a strong lens, particles of copper and cuprous oxide are visible in a separate state.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 5 , Issue 22 , February 1882 , pp. 48
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1882

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