Håleniusite-(Ce)
A valid IMA mineral species
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About Håleniusite-(Ce)
Formula:
(Ce,La)OF
according to the empirical formula (of the holotype material), the generalized formula may also be given as (Ce,REE)(O,F)F
Colour:
cream
Specific Gravity:
5.890 (Calculated)
Crystal System:
Isometric
Name:
Named for being the Ce analog of håleniusite-(La). The root name is in honor of Prof. Ulf Hålenius (b. 1951), professor and Director of the Mineralogy Department at the Natural History Museum, Stockholm, Sweden, for his contributions to the spectroscopy of minerals and the mineral sciences in general.
Type Locality:
The Ce analogue of håleniusite-(La). One of the most simple cerium minerals (compare, e.g., cerianite-(Ce)).
Name Encoding
ASCII-7:
Haleniusite-(Ce)
Unique Identifiers
Mindat ID:
55595
Long-form identifier:
mindat:1:1:55595:9
Similar Names
| Håleniusite | A synonym | |
| Håleniusite-(La) | A valid IMA mineral species | (La,Ce)OF |
IMA Classification of Håleniusite-(Ce)
Approved
IMA Formula:
Ce3+OF
Approval year:
2021
First published:
2022
Approval history:
IMA No. 2021-042
Classification of Håleniusite-(Ce)
3.DE.
3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
E : With Rare-Earth Elements
3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
E : With Rare-Earth Elements
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Hål-Ce | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Håleniusite-(Ce)
Transparency:
Opaque
Colour:
Cream
Streak:
White
Density:
5.890 g/cm3 (Calculated)
Chemistry of Håleniusite-(Ce)
Mindat Formula:
(Ce,La)OF
according to the empirical formula (of the holotype material), the generalized formula may also be given as (Ce,REE)(O,F)F
according to the empirical formula (of the holotype material), the generalized formula may also be given as (Ce,REE)(O,F)F
Elements listed:
Crystallography of Håleniusite-(Ce)
Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Space Group:
Fm3m
Setting:
Fm3m
Cell Parameters:
a = 5.6597(10) Å
Unit Cell V:
181.29 ų (Calculated from Unit Cell)
Comment:
fluorite-type structure
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.247 Å | (100) |
| 2.840 Å | (31) |
| 2.004 Å | (46) |
| 1.705 Å | (30) |
| 1.628 Å | (5) |
| 1.413 Å | (4) |
| 1.295 Å | (11) |
| 1.266 Å | (10) |
Type Occurrence of Håleniusite-(Ce)
General Appearance of Type Material:
Fine-grained pseudomorphic replacements of hexagonal tablets of bastnäsite-(Ce).
Place of Conservation of Type Material:
Mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue nos. 76144, 76145, and 76146.
Geological Setting of Type Material:
Volcanic ejectum.
Associated Minerals at Type Locality:
Synonyms of Håleniusite-(Ce)
Other Language Names for Håleniusite-(Ce)
Dutch:Håleniusiet-(Ce)
German:Håleniusit-(Ce)
Common Associates
Associations Based on Photo Data:
| 4 photos of Håleniusite-(Ce) associated with Cerite-(CeCa) | (Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3 |
| 4 photos of Håleniusite-(Ce) associated with Brochantite | Cu4(SO4)(OH)6 |
| 3 photos of Håleniusite-(Ce) associated with Håleniusite-(La) | (La,Ce)OF |
| 3 photos of Håleniusite-(Ce) associated with Ferriallanite-(Ce) | (CaCe)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) |
| 1 photo of Håleniusite-(Ce) associated with Malachite | Cu2(CO3)(OH)2 |
| 1 photo of Håleniusite-(Ce) associated with Allanite Group | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
Related Minerals - Strunz-mindat Grouping
| 3.DE.05 | Håleniusite-(La) | (La,Ce)OF |
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 Håleniusite-(Ce)
mindat.org URL:
https://www.mindat.org/min-55595.html
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References for Håleniusite-(Ce)
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2021) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) CNMNC Newsletter No 63. Mineralogical Magazine, 85 (6) 910-915 doi:10.1180/mgm.2021.74
Localities for Håleniusite-(Ce)
Showing 4 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.
Europe | |
| Johan et al. (1994) |
Portugal (TL) | |
| Kampf et al. (2022) |
Sweden | |
| Pavel M. Kartashov analytical data |
| Andersson et al. (2024) |
Quick NavTopAbout Håleniusite-(Ce)Name EncodingUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Chemistry Crystallography X-Ray Powder DiffractionType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Água de Pau Volcano, São Miguel, Azores, Portugal