A pegmatite unusually rich in Be and As minerals.
References:
- Haugen, A. & Ellingsen, H. V. (1994): Asbecasit- ein Neufund in Norwegen. Mineralien-Welt 5, (2), 14
- Ellingsen, H.V., Haugen, A., Raade, G., Eldjarn, K. & Berg, H.-J., (1995): Sjeldne mineraler i en amazonittpegmatitt ved Tennvatn i Nordland. Norsk Bergverksmuseums Skriftserie 9, 35-37.
- Larsen, A.O.,Nordrum, F.S. & Austrheim, H. (1999): Turmaliner i Norge. Bergverksmuseets Skrift 15: 21-30 [with an analysis of schorl from this locality]
- Ellingsen, H.V., Andersen, T. & Haugen, A., (2000): Nye mineraler fra amazonittpegmatitten ved Tennvatn, Nordland. Norsk Bergverksmuseums Skriftserie 17, 52-58.
- G. Raade, U. Kolitsch and T. A. Husdal (2006): Si-rich bergslagite from a granitic pegmatite at Tennvatn, north Norway. GFF 128, 65-68.
- Husdal, T. (2008): The minerals of the pegmatites within the Tysfjord granite, northern Norway. Norsk Bergverksmuseum, skrift 38, 5-28.
Mineral List:62 entries listed. 56 valid minerals.
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