Åskagenite-(Nd)
Åskagenite-(Nd) is an IMA-recognized mineral species in the silicate class, with the chemical formula Mn²⁺Nd(Al₂Fe³⁺)[Si₂O₇][SiO₄]O₂.
It crystallizes in the monoclinic crystal system (space group P2_1/m). It is a member of the Epidote structural group.
Key properties: Mohs hardness 6; specific gravity 3.737; Brown streak; Resinous luster.
IMA symbol Åsk-Nd, IMA status: approved, named in 2009.
Found in a granite pegmatite.
It is found associated with Potassic feldspar, quartz, bastnäsite, thorite, Nd-dominant analogue of allanite-(Ce), brookite, gadolinite-(Y), allophаne.
The name refers to the quarry that produced the first specimen and indicating the predominance of Nd over other REE in the A2 structural site.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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