Jacobsite

Script error: No such module "Infobox".Template:Template otherScript error: No such module "Check for unknown parameters".

Jacobsite is a manganese iron oxide mineral. It is in the spinel group and forms a solid solution series with magnetite. The chemical formula is (Mn,Mg)Fe₂O₄ or with oxidation states and substitutions: (Mn²⁺,Fe²⁺,Mg)(Fe³⁺,Mn³⁺)₂O₄.^[1]^[2]

Jacobsite, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa. Size 3.8 x 3.5 x 3.2 cm

It occurs as a primary phase or as alteration of other manganese minerals during metamorphism of manganese deposits.^[2] Typical associated minerals include hausmannite, galaxite, braunite, pyrolusite, coronadite, hematite and magnetite.^[1] It is a ferrimagnetic substance, which is weakly attracted by a magnet.

It was first described in 1869 and named for the Jakobsberg Mine, Nordmark, Filipstad, Värmland, Sweden.^[3]

References

↑ ^a ^b Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".
↑ ^a ^b Webmineral data
↑ Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".

Script error: No such module "Check for unknown parameters".

Template:Oxide-mineral-stub Script error: No such module "Navbox".