Akrochordite
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Akrochordite is an exceptionally rare hydrated hydrous arsenate mineral of the formula (Mn,Mg)4(AsO4)2(OH)4.4H2O and represents a small group of rare in the nature manganese arsenates and, similarly to most other Mn-bearing arsenates, possess pinkish colour. It is typically associated with metamorphic Mn deposits.[1][2]
