ATHENA MINERALOGY |
Mineral: | HELLANDITE-(Y) |
---|---|
Formula: | (Ca3REE)4Y2Al▢2[Si4B4O22](OH)2 |
Crystal System: | Monoclinic |
Group: | Hellandite group |
IMA Number: | 2002 s.p. |
References: | HB2/1 (1995); L 11(1999), 27; AM 87 (2002), 745; CM 53 (2015), 345 |
Type Locality: | Lindvikskollen dike, Kragerø (Kragero), Telemark, Norway |
Comments: | ▢ = vacancy |
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