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Formula: Ca3Mn2+Sb5+4O14
Antimonate, manganese-bearing
mineral
Crystal System: Trigonal
Specific gravity: 5.42 calculated
Hardness: 6½
Streak: Brownish yellow
Colour: Brownish yellow
Luminescence: Not fluorescent under UV
Environments
Localities
At the type locality, the Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden, ingersonite
was found in dump material from a metamorphosed Fe-Mn orebody. The sole sample studied, 5 x 4 x 2 cm3 in
size, consists of fine-grained calcite with two opaque minerals,
jacobsite and filipstadite,
as very fine grained crystals irregularly distributed throughout the calcite.
The specimen has no preferred orientation. Ingersonite occurs sparsely as irregular yellow aggregates, few in
number
(AM 73.405-412, HOM).
A Mindat photo (see below) also shows ingersonite associated with
roméite
Ingersonite from the Långban Mine -
Image
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