Specimen #1159

Name: Tennantite

Type: Micromount

Locality: Leonard Mine, Butte, Butte District, Silver Bow Co., Montana, USA

Favorite? N

Fluorescent? N

Size:

Weight:

Acquired: 2008-12-24

Source: Ian Heales Collection

Label: N

Comment: Copper Arsenic Sulfide. Tennantite forms a series with the much more common mineral tetrahedrite (Cu12Sb4S13, Copper Antimony Sulfide). The two share the same crystal structure but they differ in the percentage of arsenic versus antimony. Antimony rich specimens are tetrahedrite while arsenic rich specimens are tennantite. Some iron, zinc and/or silver always substitute for the copper in both minerals up to approximately 15%.

Minerals: Tennantite ((Cu,Fe)₁₂As₄S₁₃)

There is one picture on file

M01159-01.jpg:

Tennantite, Leonard Mine, Butte, Butte District, Silver Bow Co., Montana - FOV: 7.4 x 3.6 mm