Coulsellite Group
A group of related mineral species
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About Coulsellite Group
Formula:
A2-mMg2F6-wF1-n
The symbols m, w, and n represent parameters that indicate incomplete occupancy of the A, X and Z sites, respectively. (Atencio et al. 2010).
Member of:
A division of the pyrochlore supergroup, where Mg is dominant in the B site, and F is the dominant anion at the X and Z sites.
Unique Identifiers
Mindat ID:
51904
Long-form identifier:
mindat:1:1:51904:5
Chemistry of Coulsellite Group
Mindat Formula:
A2-mMg2F6-wF1-n
The symbols m, w, and n represent parameters that indicate incomplete occupancy of the A, X and Z sites, respectively. (Atencio et al. 2010).
The symbols m, w, and n represent parameters that indicate incomplete occupancy of the A, X and Z sites, respectively. (Atencio et al. 2010).
Chemical Analysis
wt%
| 1 | |
|---|---|
| Al | 5.93 % |
| Ca | 8.41 % |
| Mg | 14.9 % |
| Na | 14.2 % |
| F | 54.8 % |
| O | 1.81 % |
| P | 0.49 % |
| Total: | 100.54 % |
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | Ca0.98Na2.88Al1.03Mg2.86P0.07F13.47(OH)0.53 |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | Mt Cleveland Mine, Luina, Heazlewood district, Waratah-Wynyard municipality, Tasmania, Australia | Electron microprobe |
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0020643 | Fluornatrocoulsellite | Mumme W G, Grey I E, Birch W D, Pring A, Bougerol C, Wilson N C (2010) Coulsellite, CaNa3AlMg3F14, a rhombohedral pyrochlore with 1:3 ordering in both A and B sites, from the Cleveland mine, Tasmania, Australia American Mineralogist 95 736-740 | 2010 | Cleveland tin mine, Luina, western Tasmania | 0 | 293 |
CIF Raw Data - click here to close
Relationship of Coulsellite Group to other Species
Member of:
Other Members of Pyrochlore Supergroup:
| Betafite Group | A2(Ti,Nb)2O6Z | |
| Elsmoreite Group | W-dominant members of the Pyrochlore Supergroup. | |
| Microlite Group | A2-mTa2X6-wZ1-n | Iso. m3m(4/m32/m) : Fd3m |
| Pyrochlore Group | A2Nb2(O,OH)6Z | |
| Ralstonite Group | Group, where M3+ cations are dominant at the B site, and Al is dominant among them, and F1– is ... | |
| Roméite Group | A2(Sb5+)2O6Z |
Coulsellite Group Members:
| Fluornatrocoulsellite | CaNa3AlMg3F14 | Trig. 3m(32/m) : R3m |
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 Coulsellite Group
mindat.org URL:
https://www.mindat.org/min-51904.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Coulsellite Group
Localities for Coulsellite Group
Showing 6 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.
Australia | |
| [Fluornatrocoulsellite] Birch et al. (1990) +1 other reference |
Italy | |
| [Fluornatrocoulsellite] Demartin et al. (2014) |
| [Fluornatrocoulsellite] Demartin et al. (2014) +1 other reference |
| [Fluornatrocoulsellite] Demartin et al. (2014) +1 other reference | |
Russia | |
| [Fluornatrocoulsellite] Savel’eva et al. (2017) |
Spain | |
| [Fluornatrocoulsellite] Campeny et al. (2023) |
Mount Somma, Metropolitan City of Naples, Campania, Italy