Canfieldite

1. This name was first given to an isometric silver sulfogermanate, believed to be a new species, but later proved to be identical with argyrodite. The name was then withdrawn and transferred to (b). English
2. An orthorhombic mineral, Ag₈ SnS₆ ; black; forms a series with argyrodite.

Source: Dictionary of Mining, Mineral, and Related Terms