(Imalo, Kaominina Andrembesoa, Distrikan' i Betafo, Faritra Vakinankaratra, Faritany Antananarivo, Madagasikara)
A granite pegmatite (NYF- type) hosted in marbles known for hambergite specimens and located south of Betafo, beside the river Mania. Specimens with phenakite crystals embedded in milkwhite quartz with amazonite crystals were found close to the classic Imalo locality in the beginning of the 21.century.
References:
- Lacroix, A. (1912): Sur quelques minéraux des pegmatites du Vakinankaratra (Madagascar). Bulletin de la Société française de Minéralogie, Paris 35 , 76-84 [on the hambergite]
- Lacroix, A. (1922): Mineralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. A. Challamel (Éditeur), Paris. p 338-39 [about the hambergite]
- Pezzotta, F. (2005) A first attempt to the petrogenesis and the classification of granitic pegmatites of the Itremo Region (central Madagascar), See www.minsocam.org/MSA/Special/Pig/PIG_articles/Elba%20Abstracts%202%20Pezzotta.pdf .
6 entries listed. 6 valid minerals.
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