Images
Formula: Y4Si3O8(OH)8
Nesosilicate (insular SiO4 groups), yttrium-bearing mineral
Crystal System: Tetragonal
Specific gravity: 4.26 calculated
Streak: Colourless
Colour: Pale brown to colourless
Environments
Pegmatites
Hydrothermal environments
Atelisite-(Y) is a relatively new mineral, approved in 2010.
Localities
At the type locality, the Stetind pegmatite, Narvik, Nordland, Norway, atelisite-(Y) occurs as a late,
hydrothermal mineral in dissolution cavities in yttrofluorite in the
niobium-yttrium-fluorine (NYF) type,
quartz-microcline
pegmatite. Associated minerals include
fluorite, xenotime-(Y),
kainosite-(Y),
bastnäsite-(Ce),
calcioancylite-(Nd) and
calcioancylite-(La)
(HOM, Mindat).
Back to Minerals