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British Mineralogy
CXXXVI
Plumbum cupreo-antimoniatum sulphureum
Sulphurated Cupreo-antimoniated Lead
- Class 3. Metals.
- Order 1 Homogeneous.
- Gen. 15. Lead.
- Spec. 3. Sulphuret of Lead.
- Syn.
- Triple Sulphuret of Lead, Antimony, and Copper. Bournon and Hatchett in Phil. Trans. 1804. Part I.
- Ore of Antimony. Rashleigh, v. 1. pl. 19.
From the purity of these specimens, which were lent me by Mr. Richard Phillips, resulted in a most perfect analysis by Mr. Hatchett, who has determined the proportion of the substances in it: and the largeness of the crystals has been the cause of Count de Bournon’s determining the primitive crystal and modifications, which is so difficult, as he observes, from the irregularity of their increase. The primitive, as he remarks, is a rectangular tetraëdral prism, which has its terminal faces perpendicular to its axis. Thus it is a sort of cube, and from observation on my specimen (see tab. 135.) I find the integrant molecule may be a triëdral prism, four of which make a cube.
