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)).
Unique Identifiers
Mindat ID:
55595
Long-form identifier:
mindat:1:1:55595:9
GUID
(UUID V4):
(UUID V4):
4eb13ffb-466a-40a9-b898-7833048580f6
IMA Classification of Håleniusite-(Ce)
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 |
|---|---|---|
| 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/m 3 2/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)
Common Associates
Associated Minerals Based on Photo Data:
| 5 photos of Håleniusite-(Ce) associated with Brochantite | Cu4(SO4)(OH)6 |
| 4 photos of Håleniusite-(Ce) associated with Håleniusite-(La) | (La,Ce)OF |
| 4 photos of Håleniusite-(Ce) associated with Cerite-(CeCa) | (Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3 |
| 4 photos of Håleniusite-(Ce) associated with Ferriallanite-(Ce) | (CaCe)(Fe3+AlFe2+)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
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Håleniusite-(Ce)
Localities for Håleniusite-(Ce)
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) | |
| Miyawaki et al. (2021) +1 other reference |
Sweden | |
| Pavel M. Kartashov analytical data |
Água de Pau Volcano, São Miguel, Azores, Portugal