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Hjelmite

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SKY636421

Hjelmite

Rare Mineral

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Description
Locality: 
Kårarvet, Falun, Dalarna County, Sweden
Class: 
Crystal Group/Cluster
Size Range: 
Micromount (under 1cm)
Size: 
0.6 × 0.5 × 0.4 cm
Description

An Inadequately described/studied oxide or niobate-tantalate containing Y, Fe2+, U4+, Sn, Mn, Ca, Nb, Ta.

Hjelmite was first described from Kårarvet Mine near Falun, Sweden by Nordenskiöld (1860) who considered it, on the basis of morphological data, to be a dubious species, possibly related to tapiolite or samarskite. It may be yttromicrolite-(Y).

Mineral Data
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