Herbertsmithite

IMA formula: Cu₃Zn(OH)₆Cl₂

Crystallography: Trigonal. R-3. a = 13.654 (5) Å, c = 14.041(6) Å. Z= 24.

Specimen #145. Herbertsmithite. San Francisco Mine, Caracoles, Caracoles mining district, Sierra Gorda, Antofagasta Province, Antofagasta, Chile. FOV 3.5 mm.