annabergite
noun
an·na·berg·ite
| \ ˈanəˌbərˌgīt\
plural -s
Definition of annabergite
: a mineral consisting of a hydrous nickel cobalt arsenate (Ni, Co)3(AsO4)2·8H2O occurring in apple-green masses or capillary crystals and isomorphous with erythrite
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