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Formula: Na3(La,Ca,Na)3(CO3)5
Anhydrous carbonate, burbankite group,
lanthanum-bearing mineral
Crystal System: Monoclinic
Specific gravity: 3.5 measured, 3.57 calculated
Hardness: 3
Streak: White
Colour: Bright yellow-orange
Weakly RADIOACTIVE
Environments
Pegmatites
Hydrothermal environments
Localities
At the type locality, the Koashva Open Pit, Koashva Mt, Khibiny Massif, Murmansk Oblast, Russia,
rémondite-(La) is a late-stage hydrothermal mineral in a small,
hyperagpaitic
pegmatite. Associated minerals include
aegirine, cancrisilite,
sodalite, microcline,
villiaumite, natrolite,
pectolite, lomonosovite,
barytolamprophyllite,
natron, thermonatrite,
catapleiite,
sazykinaite-(Y),
niobium-bearing rinkite,
vitusite-(Ce) and
fluorcaphite
(AM86.377, HOM).
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