ATHENA MINERALOGY |
Mineral: | HEYERDAHLITE |
---|---|
Formula: | Na3Mn7Ti2(Si4O12)2O2(OH)4F(H2O)2 |
Crystal System: | Anorthic (Triclinic) |
Group: | Astrophyllite supergroup |
IMA Number: | 2016-108 |
References: | MM 81 (2017), 403-409; EJM 29 (2017), 342 |
Type Locality: | Bratthagen road cut pegmatite, Lågendalen (Lagendalen), Hedrum, Larvik, Vestfold, Norway |
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