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Hogtuvaite - Bordvedåga, Høgtuva, Rana, Nordland, Norway (type locality) (#:MINS9038)

Black crystal of Høgtuvaite up to 1,7 cm in matrix from the type locality.

Formula :
(Ca,Na)₂(Fe²⁺,Fe³⁺,Ti⁴⁺)₆[O₂/Be(Si,Al)₅O₁₈]
System: triclinic Hardness:5½ Rarity:very rare
Strunz id:VIII/F.14-35 - SILICATES
Name origin: Named for the Høgtuva peak, the nearest significant reference point in the area of the type locality in Nordland, Norway. The peak is located about 7 km NW of the TL. It was first found in 1983 by Ingvar Lindahl (Norwegian Geological Survey) during uranium exploration in the area, and named by Grauch et al. (1994).