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Fluornatrocoulsellite

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Formula:
CaNa3AlMg3F14
System:
Trigonal
Name:
For Ruth Elise Coulsell (1912–2000), a foundation member and honorary life member of the Mineralogical Society of Victoria.
A rhombohedral mineral in the Pyrochlore Supergroup.
Appears to be unique among published pyrochlore phases in having a 1:3 ordering of metal atoms Ca:Na in the A sites and Al:Mg in the B sites.


Classification of Fluornatrocoulsellite

Approved
Notes:
Renamed by the IMA
Approval Year:
2009
Approval History:
Renamed from coulsellite after being moved into the Pyrochlore Supergroup (IMA July 2016.)
3.00.

3 : HALIDES
0 :
0 :
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http://www.mindat.org/min-39766.html
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Type Occurrence of Fluornatrocoulsellite

Physical Properties of Fluornatrocoulsellite

Density:
3.011 g/cm3 (Calculated)

Crystallography of Fluornatrocoulsellite

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Space Group Setting:
R3m
Cell Parameters:
a = 7.1756(1) Å
α = 59.867(1)°
Unit Cell Volume:
V 260.46 ų (Calculated from Unit Cell)
Z:
1
Twinning:
multiply twinned about threefold axes of the pseudocubic cell.
Comment:
corresponding hexagonal cell parameters are a = 7.1620(1) Å, c = 17.5972(3) Å.

Chemical Properties of Fluornatrocoulsellite

Formula:
CaNa3AlMg3F14
All elements listed in formula:

Relationship of Fluornatrocoulsellite to other Species

Other Members of Group:

Other Names for Fluornatrocoulsellite

Name in Other Languages:

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.

References for Fluornatrocoulsellite

Reference List:
Birch W D, Grey I E, Mumme W G, Pring A (2009) Coulsellite, a new mineral from the Cleveland mine, Luina, Tasmania. Australian Journal of Mineralogy 15, 21-24

Grey, I.E., Mumme, W.G., 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.

Internet Links for Fluornatrocoulsellite

Localities for Fluornatrocoulsellite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Australia (TL)
 
  • Tasmania
    • Heazlewood district
      • Luina
Grey, I.E., Mumme, W.G., 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.
Italy
 
  • Campania
    • Naples Province
      • Somma-Vesuvius Complex
Demartin, F., Campostrini, I., Castellano, C., & Russo, M. (2014). Parascandolaite, KMgF3, a new perovskite-type fluoride from Vesuvius. Physics and chemistry of minerals, 41(6), 403-407.
Mineral and/or Locality  
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