Bastnäsite
A group of related mineral species
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About Bastnäsite
Name used for F-dominant members of the Bastnäsite Group for which the dominant REE element is not known; Bastnäsite-(Ce) is the most common member.
A greasy, wax-yellow to reddish-brown weakly radioactive mineral, most commonly found in metamorphic rocks and pegmatites, associated with allanite, cerite, tysonite, fluorite, and tornebohmite.
The group members may be part of the Bastnäsite-Vaterite Homologous Series.
Bastnäsites form a polysomatic series with synchysites.
Visit gemdat.org for gemological information about Bastnäsite.
A greasy, wax-yellow to reddish-brown weakly radioactive mineral, most commonly found in metamorphic rocks and pegmatites, associated with allanite, cerite, tysonite, fluorite, and tornebohmite.
The group members may be part of the Bastnäsite-Vaterite Homologous Series.
Bastnäsites form a polysomatic series with synchysites.
Visit gemdat.org for gemological information about Bastnäsite.Unique Identifiers
Mindat ID:
563
Long-form identifier:
mindat:1:1:563:0
Physical Properties of Bastnäsite
Vitreous
Chemistry of Bastnäsite
Mindat Formula:
(Ce/Nd/Y/REE)(CO3)F
Synonyms of Bastnäsite
Other Language Names for Bastnäsite
Relationship of Bastnäsite to other Species
Member of:
Other Members of Bastnäsite Group:
| Hydroxylbastnäsite-(Ce) | Ce(CO3)(OH) | Hex. 6 : P6 |
| Hydroxylbastnäsite-(La) | (La,Nd,Ce)(CO3)(OH,F) | Hex. 6 : P6 |
| Hydroxylbastnäsite-(Nd) | Nd(CO3)(OH) | Hex. 6 m2 : P62c |
| Thorbastnäsite | ThCa(CO3)2F2 · 3H2O | Hex. 6 m2 : P62c |
Bastnäsite Members:
| Bastnäsite-(Ce) | Ce(CO3)F | Hex. 6 m2 : P6c2 |
| Bastnäsite-(La) | La(CO3)F | Hex. 6 m2 : P62c |
| Bastnäsite-(Nd) | Nd(CO3)F | Hex. 6 m2 : P62c |
| Bastnäsite-(Y) | Y(CO3)F | Hex. 6 m2 : P62c |
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 Bastnäsite
mindat.org URL:
https://www.mindat.org/min-563.html
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References for Bastnäsite
Reference List:
Localities for Bastnäsite
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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.
Zagi Mountain, Hameed Abad Kafoor Dheri, Peshawar District, Khyber Pakhtunkhwa Province, Pakistan