Birnessite

birnessite

(Na,Ca,K)₀.₆(Mn⁴⁺,Mn³⁺)₂O₄·(H₂O)₁.₅Chemical formula

1.5Mohs hardness

1.50 g/cm³Density

Facts

Chemical formula: (Na,Ca,K)₀.₆(Mn⁴⁺,Mn³⁺)₂O₄·(H₂O)₁.₅
Mohs hardness: 1.5
Density: 1.50 g/cm³
Elements in formula: Sodium, Calcium, Potassium, Manganese, Oxygen, Hydrogen
Number of elements: 6
IMA status: Grandfathered
Type locality: Birness (Ellon)
Named after: Birness (Ellon)