(Buer, Bjørkedalen, Porsgrunn, Telemark, Norge)
Syenite pegmatite material found on dumps from construction of a watertunnel. The pegamtite dike was hosted in basalt
References:
- Segalstad, T. V. & Larsen, A. O. (1978): Chevkinite and perrierite from the Oslo region, Norway. American Mineralogist 63, 499-505
- Larsen, A. O. (1988): Helvite group minerals from syenite pegmatites in the Oslo Region, Norway. Contribution to the mineralogy of Norway no 68. Norsk Geologisk Tidsskrift 68: 119-124 [with analysis of helvite from Buer]
- Engvoldsen, T., Andersen, F., Berge, S. A. & Burvald, I. (1991): Pegmatittmineraler fra Larvik ringkompleks. STEIN 18(1), 15-71
- Andersen, F., Berge, S. A. & Burvald, I. (1996): Die Mineralien des Langesundsfjords und des umgebenden Larvikit-Gebietes, Oslo-Region, Norwegen. Mineralien-Welt 7(4), 21-100
Mineral List:35 entries listed. 34 valid minerals. 1 type locality (valid mineral).
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