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Formula: (Fe,Rh,Ni,Ir,Cu,Co,Pt)9-xS8
Sulphide, rhodium-, iridium-,
cobalt- and platinum-
bearing mineral
Crystal System: Tetragonal
Specific gravity: 7.186 calculated
Streak: Black
Colour: Light brownish grey, greyish creamy with a brownish tint
Environments
Ferhodsite occurs in grains of osmium -
iridium - rubidium alloy formed
from fractionated iron - nickel -
copper melt enriched in the
platinum group elements. It is probably the product of
metasomatic replacement of magmatic minerals during
serpentinisation of
ultramafic rocks.
Associated minerals include cooperite,
cuproiridsite, bowieite,
kashinite, laurite and
erlichmanite; ferhodsite is commonly mantled and corroded by
chengdeite
(HOM).
Localities
At the type locality, the Konder alkaline-ultrabasic massif, Ayan-Maya district, Khabarovsk Krai, Russia,
ferhodsite occurs as isometric or platy, triangular and corroded grains located along the periphery of
isoferroplatinum grains. Commonly, ferhodsite is mantled
and corroded by chengdeite.
Associated minerals include opal,
kashinite,
isoferroplatinum,
cuproiridsite, cooperite,
chengdeite and bowieite
(Mindat).
The ferhodsite is found in gold -
platinum group element bearing alluvial placer deposits
(HOM).
At the Seyba river placers, Sisim Placer Zone, Lysanskiy dunite-peridotite-gabbro complex, Krasnoyarsk Krai, Russia,
ferhodsite occurs in gold -
platinum group element bearing alluvial placer deposits
(HOM).
At Nizhnii Tagil, Sverdlovsk Oblast, Russia, ferhodsite occurs in mineral separates from
dunite
(HOM).
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