Purpurite is a mineral, manganese phosphate, MnPO4 with varying amounts of iron depending upon its source. It occurs in color ranges from brownish black via purple and violet to dark red. Purpurite forms a series with the iron-bearing endmember heterosite, FePO4. See also Manganese violet References Manganese(III) minerals Iron(III) minerals Phosphate minerals Orthorhombic minerals Minerals in space group 53