RRUFF #889

Andyrobertsite

Элементы:K Cd Cu As O H

Valence:KCd^2+Cu^2+As^5+O H

Химия

IMA chemistry:: KCdCu5(AsO4)4[As(OH)2O2]·2H2O
Valence chemistry:: KCd2+Cu2+5(As5+O4)4[As5+(OH)2O2]·2H2O

Классификация

Crystal systems:: monoclinic
Space groups:: P21, m
Structural group:: Andyrobertsite
IMA status:: Approved

Происхождение

Country:: Namibia
Published:: 1997
Oldest age Ma:: 541
Paragenetic modes:: Biotic, Secondary, Stage 7: Great Oxidation Event, PM47 - Low-T subaerial oxidative hydration/weathering

Примечания

Cooper M A, Hawthorne F C, Pinch W W, Grice J D (1999) Andyrobertsite and calcioandyrobertsite: two new minerals from the Tsumeb mine, Tsumeb, Namibia, Mineralogical Record 30, 181-186