Images
Formula: AgBiSe2
Sulphosalt, matildite group
Crystal System: Trigonal
Specific gravity: 7.72 calculated
Hardness: 3 to 3½
Colour: Creamy-yellow to pink in reflected light/lead grey
Common impurities: Pb,Cu,Co,Ni,S
Environments
Sedimentary environments
Metamorphic environments
Hydrothermal environments
Localities
At the Iron Monarch open cut, Iron Knob, Middleback Range, Eyre Peninsula, South Australia, polymineralic grains with
bohdanowiczite, clausthalite,
eucairite and umangite associated
wittichenite and bismuthinite
have been reported from the sedimentary iron deposit
(CM 43.899-908).
At the Buraco do Ouro mine, Cavalcante, Goiás, Brazil, the mineralization is hosted in
muscovite-quartz
mylonite in a silicified shear zone near the contact between
biotite-muscovite granite and
paragneiss. The ore mineralogy consists of
gold, paraguanajuatite,
kalungaite, isomertieite,
mertieite, sperrylite,
padmaite, bohdanowiczite,
clausthalite, krut'aite,
ferroselite, uraninite and
unnamed Ag-Pb-Bi-Se minerals. Local magnetite concentrations and rare
chalcopyrite and pyrite are also
associated with both mineralised and barren mylonite in a
gangue consisting of muscovite,
quartz and rare tourmaline
(MM 81.463–475).
At the Kidd mine, Kidd Township, Timmins, Cochrane District, Ontario, Canada, bohdanowiczite typically forms
blebs in bornite or an intergrowth with
cobaltite and clausthalite;
other associated minerals include tennantite,
carrollite, chalcopyrite,
chalcocite, naumannite,
eucairite and clausthalite
(CM 43.899-908, HOM).
At the St Andreasberg Mining District, Lower Saxony, Germany, bohdanowiczite has been noted in
selenide-bearing
calcite–quartz veins from the
ancient St Andreasberg silver deposit
(CM 43.899-908).
At Frederik VII's Mine, Qaqortoq, Narsaq, Kujalleq, Greenland, bohdanowiczite occurs with
hessite, chalcocite,
digenite, umangite,
naumannite, eucairite,
bornite, chalcopyrite,
clausthalite, covellite,
magnetite, hematite,
goethite, malachite and
azurite
(HOM, AM 55.2135).
At the type locality, Kletno, Gmina Stronie Śląskie, Kłodzko County, Lower Silesian Voivodeship, Poland,
bohdanowiczite occurs in
magnetite-fluorite veins adjacent
to magnetite skarn, and in
fluorite-quartz-sulphide veins.
Associated minerals include uraninite,
clausthalite, chalcocite,
tiemannite, umangite,
klockmannite, wittichenite,
silver, naumannite,
bornite, chalcopyrite,
fluorite, quartz and
emplectite (AM 55.2135, HOM). The bohdanowiczite is
considered to have formed by exsolution from its Cu–Bi–Ag–S-bearing
clausthalite host
(CM 43.899-908).
Bogdanovite occurs with bilibinskite in the
supergene zone of oxidation of deposits in Kazakhstan and far
eastern USSR, associated with gold, various
tellurides, and tellurites of Fe,
Cu and Pb
(AM 64.1329).
At the Ocna de Fier-Dognecea District, Caraş-Severin, Romania,
bohdanowiczite–kawazulite intergrowths associated
with wittichenite and included in
chalcopyrite occur in the
iron-copper
skarn deposit
(CM 43.899-908).
In Eastern Transbaikalia, Zabaykalsky Krai, Russia, bohdanowiczite has been reported intergrown with
clausthalite, naumannite,
chalcopyrite and bornite in a
sulphide deposit
(CM 43.899-908).
Back to Minerals