akrochordite

{{Infobox mineral | name = Akrochordite | boxwidth = | boxbgcolor = | image = Eveite, Akrochordite-661880.jpg | imagesize = | alt = | caption = Bright green, vitreous, cluster of eveite (under 0.5 mm) and brown, subhedral akrochordite in a contrasting, pink, granular carbonate matrix | category = Phosphate minerals | formula = |IMAsymbol=Akr | molweight = | strunz = 8.DD.10 | system = Monoclinic | class = Prismatic (2/m) (same H-M symbol) | symmetry = P21/c | unit cell = | color = Yellowish red-brown, pale to dark brown, pale pink | colour = | habit = | twinning = | cleavage = Perfect. On {010} , perfect; a second, perpendicular to the first. | fracture = | tenacity = Brittle | mohs = | luster = Sub-Vitreous, resinous, dull | streak = | diaphaneity = Translucent | gravity = | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = }} Akrochordite is a rare hydrated arsenate mineral with the chemical formula and represents a small group of rare manganese (Mn) arsenates and, similarly to most other Mn-bearing arsenates, possess pinkish colour. It is typically associated with metamorphic Mn deposits.

==References==