Mengeite
Mengeite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Ba(Mg,Mn²⁺)Mn³⁺₄(PO₄)₄(OH)₄·4H₂O.
It crystallizes in the triclinic crystal system (space group P-1).
Key properties: Mohs hardness 3; specific gravity 3.4; Pale salmon-pink streak; Vitreous luster; optically biaxial.
IMA symbol Mge, IMA status: approved, named in 2018.
Found in a heavily brecciated hydrothermal vein.
It is found associated with Quartz.
The mineral was named to honor Johann Menge (1788-1852), German geologist and linguist whose 1841 booklet, The Mineral Kingdom of South Australia.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
Browse more M minerals or help write this entry.