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Formula: Cu6(Cu4Zn2)Sb4Se13
Sulphosalt, hakite subgroup,
tetrahedrite group,
antimony- and selenium-
bearing mineral
Crystal System: Isometric
Environments
Hakite-(Zn) is a new mineral, approved in 2022 and to date (March 2024) reported only from the type locality.
Localities
The type locality is the Mine dump, Uranium Mine No. 16, Háje, Příbram District, Central Bohemian Region, Czech Republic.
In the Příbram uranium and base-metal district, there are four main mineralisation stages:
(1) siderite-sulphidic;
(2) calcite;
(3) calcite–uraninite;
(4) calcite-sulphidic.
Selenide mineralisation occurs in close association with
uraninite of the
calcite–uraninite mineralisation, but
selenides are always younger than
uraninite. Uranium ore is represented
by uraninite, coffinite and
uranium-bearing anthraxolite
(pyrobitumen). The
selenium-uranium mineralisation is of
low-temperature hydrothermal origin and is associated with calcite veins, tens
of centimetres to several metres thick. The observed selenide assemblage is
extraordinarily rich, with the total number of selenide species exceeding 25
and including the recently approved new species příbramite,
bytízite and pošepnýite, along with
the three new members of the hakite series hakite-(Zn),
hakite-(Fe) and hakite-(Cd).
These new members of the hakite series were identified in
calcite-uraninite
gangue.
Hakite-(Zn) was observed as irregular aggregates up to several mm in size. It also forms, along with
hakite-(Hg) and
tetrahedrite-(Zn), domains within zoned idiomorphic crystals up to 100 μm
in size
(MM 88.5.602-612).
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