Allactite
A variety of Minerals
What is Allactite?
Allactite is a rare arsenate mineral of metamorphosed manganese zinc ore deposits. It is found in Sweden and New Jersey, US. Its name originated from Greek αλλάκτειν (allaktein) meaning "to change", referring to the strong pleochroism of the mineral.
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Allactite Localities Map
See where Allactite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Quick Facts
Physical Properties
- Color
- Brown, dark to light purplish red, brownish red, colourless to white
- Hardness (Mohs)
- 4.5
- Density
- 3.94 g/cm³
- Streak
- Grayish to faint brown
Chemical Properties
- Chemical Formula
- Mn2+7(AsO4)2(OH)8
- Elements
- As, H, Mn, O
Also Known As
AllactiteElfstorpite
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