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Angola | |
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| M. R. Portugal V. Ferreira, Heulandite do Cabo Ledo, Angola, Memórias e Notícias No. 64, Publicaçõs do Museu e Laboratório Mineralógico e Geológico da Universidade de Coimbra e do Centro de Estudos Geológicos, 1967. |
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Faroe Islands | |
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| Personally collected by Günter Frenz |
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Spain | |
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| Strasser, A., Kirchner, E., (2006): Minerale aus einem Alkali-Basalt-Differentiat vom Risco Famara, Lanzarote, Kanarische Inseln, Der Aufschluss, Vol. 57, 335-338 |
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| Van Opstal, Simon (2021) Mineralen verzamelen op Lanzarote: van natroliet tot motukoreaiet. Geonieuws: 46(4): 87-92 (in Dutch).
Van Opstal, S., Dillen, R., Mestrom, P. (2021) Motukoreait von Lanzarote, Kanarische Inseln, Spanien. Lapis 46 (9), 42-43 (in German). |
- Santa Cruz de Tenerife Province
| Dill, Harald Gerold, Rüsenberg, Kurt Anton (2023) Marker Minerals in Volcanics and Xenoliths—An Approach to Categorize the Inferred Magmatic Rocks Underneath the Present-Day Volcanic Landscape of Tenerife, Spain (NW African Rare Mineral Province) Minerals, 13 (11) 1410 doi:10.3390/min13111410 |
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| Analyzed by XRD by Dr. Joan Vinals (Barcelona)- Col. Agustin Agudo Espinosa |
