Copper World

Cumengeite

IMA formula: Pb21Cu20Cl42(OH)40(H2O)6

Crystallography: Tetragonal. I4/mmm. a = 15.1007(2) Å, c = 24.4940(4) Å. Z = 2.

Specimen #56. Cumengeite and botallackite. Herzog Julius smelter slag locality, Astfeld, Langelsheim, Goslar District, Lower Saxony, Germany. FOV 5.2 mm.
Specimen #270. Cumengeite and boleite. Amelia Mine, Arroyo de la Soledad, Boleo District, Santa Rosalía, Mulegé Municipality, Baja California Sur, Mexico. FOV 6.7 mm.