1. 
   annabergite
   hydrated nickel arsenate mineral that is very similar to erythrite (q.v.).[1 related articles]
   Found op http://www.britannica.com/eb/a-z/a/77
   
   
2. 
   Annabergite
   Annabergite is an arsenate mineral consisting of a hydrous nickel arsenate, Ni3(AsO4)2·8H2O, crystallizing in the monoclinic system and isomorphous with vivianite and erythrite. Crystals are minute and capillary and rarely met with, the mineral occurring usually as soft earthy masses and encrustat...
   Found op http://en.wikipedia.org/wiki/Annabergite
   
   
3. 
   Annabergite
   Annabergite (also known as nickel bloom) is a rare secondary mineral of a pale green colour, that forms in the oxidation zones of ore deposits and is found as a powdery coating on the surface of nickel-bearing minerals such as chloanite and nickeline. Annabergite is a hydrated arsenate of nickel of ...
   Found op http://www.probertencyclopaedia.com/browse/HA.HTM
   
   

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