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Formula: CaY(CO3)2(OH).H2O
Hydrated carbonate containing hydroxyl, yttrium-bearing mineral
Crystal System: Tetragonal
Specific gravity: 3.19
Hardness: 2 to 3
Streak: White
Colour: White to colourless
Solubility: Effervesces in 1:10 acids (Dana)
Weakly RADIOACTIVE
Environments
Pegmatites
Carbonatites
Metamorphic environments
Hydrothermal environments
Kamphaugite-(Y) is a late-stage secondary mineral formed
as a result of low-temperature hydrothermal alteration of yttrium-bearing
minerals in granitic rocks, often found in cavities and cracks
(Mindat, Dana).
Localities
At the Paratoo copper mine, Yunta, Olary Province, South Australia, kamphaugite-(Y) is associated with
decrespignyite-(Y),
caysichite-(Y) and
donnayite-(Y) in narrow fissures of a fine-grained
dolomitic slatestone
(Minrec 35.2.177, HOM).
At the Cala Francese Quarries, La Maddalena Island, La Maddalena, Sassari Province, Sardinia, Italy,
kamphaugite-(Y) is associated with with kainosite-(Y) and
hingganite-(Y)
(HOM ).
At the Verkhnee Espe Massif, Akzhaylyautas Mountains, Tarbagatai Range, East Kazakhstan, kamphaugite-(Y)
occurs in metasomatically altered alkali granite
(AM 79.387-388, HOM).
At the type locality, Hørtekollen, Sylling, Lier, Buskerud, Norway, kamphaugite-(Y) occurs as platy crystals
to 1 mm across, sometimes with a coating of montmorillonite, in
cavities of a magnetite-helvine
contact metamorphic
skarn deposit. Associated minerals include
wollastonite, tourmaline,
sphalerite, scorodite,
rhodonite, quartz,
pyroxenes, montmorillonite,
molybdenite, heulandite-(Ca),
hemimorphite, helvine,
grossular, galena,
fluorite, epidote,
chabazite, calcite,
biotite, apatite,
amphiboles, K-feldspar and
allanite group minerals
(AM 79.387-388, Mindat).
At Høydalen, Tørdal, Drangedal, Vestfold og Telemark, Norway, kamphaugite-(Y) occurs as a fine-grained
alteration product of kuliokite-(Y)
(AM 79.387-388).
At the Tangen Feldspar Mine, Kragerø, Vestfold og Telemark, Norway, kamphaugite-(Y) occurs as well-crystallised
rosettes along cracks in feldspar and
quartz in the granite
pegmatite
(AM 79.387-388, Dana).
At the Goudini carbonatite complex, Ngaka Modiri Molema District Municipality, North West, South Africa,
kamphaugite-(Y) occurs as white spheroids on opal from a
quartz and baryte vein in a
carbonatised volcano
(AM 79.387-388, HOM).
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