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Formula: Ca3CeAl2(SO4)F13.12H2O
Hydrated fluoride, chukhrovite group
Crystal system: Isometric
Specific gravity: 2.274 to 2.398 measured, 2.460 calculated
Hardness: 3
Streak: White
Colour: White with a lilac tint
Luminescence: Not fluorescent under UV
Solubility: Readily dissolved by hydrochloric acid and by sulphuric acid
Environments
Localities
The type locality is the Tripi mine, Alì Terme, Metropolitan City of Messina, Sicily, Italy. The mineral was
originally reported from the Yaroslavskoye Sn/fluorite Deposit, Voznesenskii ore district, Khorolsky District,
Primorsky Krai, Russia, but the original type material has Y>Ce and is a Ce-rich
chukhrovite-(Y).
At the Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany,
chukhrovite-(Ce) occurs in a hydrothermal
baryte–fluorite vein deposit,
associated with fluorite,
jarosite, pyrite and
sulphur
(HOM).
Chukhrovite-(Ce) from the Clara Mine -
Image
At the Tripi mine, Alì Terme, Metropolitan City of Messina, Sicily, Italy, chukhrovite-(Ce) occurs as white
cube-octahedral crystals, up to 0.05 mm in size, associated with creedite,
quartz and fluorite.
Chukhrovite-(Ce) belongs to the chukhrovite group and its
structure is closely similar to that of chukhrovite-(Y), whereas
that is not the case for chukhrovite-(Ca)
(MM 89.3.328-335).
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