Bayldonite

IMA formula: Cu3PbO(AsO3OH)2(OH)2

Crystallography: Monoclinic. C2/c. a = 10.147(2) Å, b = 5.892(1) Å, c = 14.081(2) Å, β = 106.05(1) Å. Z = 4.

Specimen #106. Bayldonite. Falgayrolles, Monteils, Villefranche-de-Rouergue, Aveyron, Occitanie, France. FOV 4.0 mm.