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Formula: ScYNb2O8
Multiple oxide, samarskite group,
scandium-bearing mineral
Crystal System: Monoclinic
Specific gravity: 5.602 calculated
Hardness: 5
Streak: Brown
Colour: Black to dark brown, internal reflections are red-brown.
Environments
Shakhdaraite-(Y) is a new mineral, approved in 2020 and to date (March 2025)
reported only from its type locality.
Localities
At the type locality, the Leskhozovskiy granitic pegmatite, Shakhdara Range, Shughnon, Gorno-Badakhshan,
Tajikistan, shakhdaraite-(Y) occurs mainly as grains from 10 to 150 μm in size in a the
pegmatite complex in association with
quartz, albite,
pyrochlore-microlite,
fersmite and an unnamed
scandium-niobium oxide;
only one large,
single, well-shaped crystal 200 μm long was found in a small cavity with
quartz, albite,
bertrandite, pyrochlore
and jarosite
(CM 60.2.369-382).
Shakjdaraite-(Y) from the Leskhozovskiy
pegmatite - Image
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