Secondary mineral in the oxidized zone of complex granite pegmatites, replacing primary phosphate minerals, principally triphylite.Forms a series with the Mn+++ end-member Purpurite .
IMA Status:
Valid Species (Pre-IMA) 1826
Locality:
Palermo #1 mine, New Hampshire, USA. Link to MinDat.org Location Data.
Name Origin:
From the Greek for another, probably because it was the second manganese-bearing species described from the type locality.
Chemical Formula: 