Images
Formula: (Fe3+0.5Sb5+0.5)Mn2+2O4
Oxide, ulvöspinel subgroup,
oxyspinel group,
spinel supergroup,
antimony- and
manganese- bearing mineral
Crystal System: Isometric
Specific gravity: 4.9 calculated
Hardness: 6 to 6½
Streak: Brown
Colour: Black
Environments
Filipstadite occurs in metamorphosed
iron-manganese orebodies
(HOM).
Localities
At the type locality, Långban, Filipstad, Värmland, Sweden, filipstadite is known from only one specimen, which
is also the holotype specimen for ingersonite. It was found on the dumps
of the mine as euhedral crystals up to 200 microns across, occurring singly and in aggregates, and intimately
associated with jacobsite,
ingersonite and calcite. Other
associated minerals are antimony and a magnesium silicate, probably
clinohumite
(AM 73.413-419).
Filipstadite from Långban - Image
At the Jacobsberg mine, Nordmark, Filipstad, Varmland, Sweden, filipstadite is associated with
hausmannite, forsterite,
phlogopite, calcite,
copper, hedyphane and
svabite
(HOM).
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