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Tassieite

Formula:
(Na,[ ])Ca
 
2
(Mg,Fe
2+
 
,Fe
3+
 
)
 
2
(Fe
2+
 
,Mg)
 
2
(Fe
3+
 
,Mg)
 
2
[PO
 
4
]
 
6
 · 2H
 
2
O
System:Orthorhombic
Name:Named for type locality, Tassie Tarn, Stornes Peninsula, Larsemann Hills, Antarctica


Wicksite Group

Classification of Tassieite

IMA status:Approved 2006
Strunz 8th edition ID:7/C.18-05
Nickel-Strunz 10th (pending) edition ID:8.CF.05

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
F : With large and medium-sized cations, RO4:H2O > 1:1
Dana 8th edition ID:40.2.16.3

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
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Type Occurrence of Tassieite

Type Locality:Johnston Firth, Stornes Peninsula, Larsemann Hills (Larseman Hills), Prydz Bay, Ingrid Christensen Coast, Princess Elizabeth Land, Eastern Antarctica, Antarctica

Crystallography of Tassieite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pbca {P21/b 21/c 21/a}
Cell Parameters:a = 12.4595(7) Å, b = 11.5955(16) Å, c = 12.7504(7) Å
Ratio:a:b:c = 1.075 : 1 : 1.1
Unit Cell Volume:V 1842.1 ų
Z:4

Chemical Properties of Tassieite

Formula:
(Na,[ ])Ca
 
2
(Mg,Fe
2+
 
,Fe
3+
 
)
 
2
(Fe
2+
 
,Mg)
 
2
(Fe
3+
 
,Mg)
 
2
[PO
 
4
]
 
6
 · 2H
 
2
O
All elements listed in formula:Ca, Fe, H, Mg, Na, O, P

Relationship of Tassieite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.CF.05Grischunite
NaCa
 
2
Mn
2+
5
Fe
3+
 
[AsO
 
4
]
 
6
 · 2H
 
2
O
8.CF.05Wicksite
NaCa
 
2
(Fe
2+
 
,Mn
2+
 
)
 
4
MgFe
3+
 
[PO
 
4
]
 
6
 · 2H
 
2
O
8.CF.05Bederite
NaCa
 
2
(Mn
2+
 
,Mg,Fe
2+
 
)
 
2
Mn
2+
2
(Fe
3+
 
,Mg
2+
 
,Al)
 
2
[PO
 
4
]
 
6
 · 2H
 
2
O
8.CF.10Haigerachite
KFe
3+
3
[(H
 
2
PO
 
4
)
 
3
|HPO
 
4
]
 
2
 · 4H
 
2
O

Other Names for Tassieite

Synonyms:
IMA2005-051
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Tassieite

Reference List:Grew, E.S., Armbruster, T., Medenbach, O., Yates, M.G., Carson, C.J. (2006): Tassieite, (Na,[])Ca2(Mg,Fe2+,Fe3+)2(Fe3+,Mg)2(Fe2+,Mg)2(PO4)6•2H2O, a hydrothermal wicksite-group mineral in fluorapatite nodules from granulite-facies paragneiss in the Larsemann Hills, Prydz Bay, East Antarctica. Canadian Mineralogist, 45, 293-305(2007).

Internet Links for Tassieite

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    Localities for Tassieite

    (TL) indicates type locality. ? 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.
    Antarctica
     
    • Eastern Antarctica
      • Princess Elizabeth Land
        • Ingrid Christensen Coast
          • Prydz Bay
            • Larsemann Hills (Larseman Hills)
              • Stornes Peninsula
    		Canadian Mineralogist 45,293(2007)
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 8th Nov 2009 15:38:07