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Microlite from
Varuträsk, Skellefteå, Västerbotten, Sweden

Description
Comments:subhedral crystals up to 20 mm. chemistry appr. (Ca,Na)2(Ta,Nb)2O6(OH,F). Also as metasomatic product, replacing columbite-tantalite. Metasomatic microlite has A-site deficiencies and low F in contrast to primary microlite.
Quality of samples:not specified / average specimens
Rarity at site:Rare
Confirmation
Validity:Believed Valid
References
References:Cerny et al. (2004) Can. Min. 89, 505-518
Data
Mineral Data:Click here to view Microlite data
Locality Data:Click here to view Varuträsk, Skellefteå, Västerbotten, Sweden
Mineral and/or Locality
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