Tags: Chemical Substance, Mineral.
Ericssonite has a general formula of BaMn2FeO[Si2O7](OH). It was discovered in 1967 and named after John Ericsson (July 31 1803 – March 8 1889) a well known Swedish American inventor engineer and designer of the iron-clad ship USS Monitor. Ericssonite was discovered in the Jakobsberg Mine in Värmland Sweden. Ericcsonite is monoclinic; this means it contains three unequal vectors two of these vectors angles are perpendicular while the other is at an angle greater than 90°.