Samiresite
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About Samiresite
Formula:
(U,Ca,Ce,Pb)2(Nb,Ta)2O6(OH,F)
Name:
After the locality at Samiresy, Madagascar.
A Pb-bearing variety of Zero valent dominant member of Pyrochlore Group
Described and named by Lacroix (1912) as a betafite with a content of Pb. It was found in a metamict state. Named after the locality, the Samiresy pegmatite in the Betafo district, Vakinankaratra Region, Madagascar. Samiresite was discredited by IMA in 1977 (Hogarth 1977) as a plumbian uranpyrochlore. Uranopyrochlore was later discredited by IMA 2010 due to inadequate modern analysis (Atencio et al. 2010). It belongs to the zero-valent-dominant pyrochlores.
Described and named by Lacroix (1912) as a betafite with a content of Pb. It was found in a metamict state. Named after the locality, the Samiresy pegmatite in the Betafo district, Vakinankaratra Region, Madagascar. Samiresite was discredited by IMA in 1977 (Hogarth 1977) as a plumbian uranpyrochlore. Uranopyrochlore was later discredited by IMA 2010 due to inadequate modern analysis (Atencio et al. 2010). It belongs to the zero-valent-dominant pyrochlores.
Unique Identifiers
Mindat ID:
3514 (as Samiresite)
3316 (as Pyrochlore Group)
3316 (as Pyrochlore Group)
Long-form identifier:
mindat:1:1:3514:5 (as Samiresite)
mindat:1:1:3316:5 (as Pyrochlore Group)
mindat:1:1:3316:5 (as Pyrochlore Group)
Chemistry of Samiresite
Mindat Formula:
(U,Ca,Ce,Pb)2(Nb,Ta)2O6(OH,F)
Element Weights:
Other Language Names for Samiresite
German:Samiresit
Spanish:Samiresita
Common Associates
Radioactivity
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Samiresite
mindat.org URL:
https://www.mindat.org/min-3514.html
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References for Samiresite
Reference List:
Lacroix, Alfred (1912) Sur un groupe de niobotantalates cubiques radioactifs des pegmatites du Vakinankaratra. Bulletin de Minéralogie, 35 (2) 84-92 doi:10.3406/bulmi.1912.3498
Lacroix, Alfred (1922) Minéralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. Augustin Challamel. 624 pp.
Hogarth, D. D. (1977) Classification and nomenclature of the pyrochlore group. American Mineralogist, 62 (5-6) 403-410
Localities for Samiresite
Showing 3 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Madagascar | |
| Behier (1963) |
| Lacroix (1922) |
| Lacroix (1912) +1 other reference |
Samiresy, Tritriva, Betafo District, Vakinankaratra, Madagascar