Tennantite |
| Cu8As2S7 |
| Isometric-tetrahedral |
Forms
d(110), o(111), n(211). (See Figure 23.)
Occurrence
A narrow open vein found in 1927 on the 900-foot level of the mine at Sterling Hill
contained a few crystals of tennantite, intimately intergrown with sphalerite and galena.
With it were stilbite and a network of needles of actinolite and epidote with a few plates
of barite. Qualitative tests for arsenic and copper made by Mr. Bauer determined the
mineral as tennantite rather than tetrahedrite.
| Figure 23 Crystal of tennantite, showing the forms d(110), o(111), and n(211) Sterling Hill. |
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Website
© by Herb Yeates 1997-2006.
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