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Tassieite

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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
Essential elements:Ca, Fe, H, Mg, Na, O, P
All elements listed in formula:Ca, Fe, H, Mg, Na, O, P

Relationship of Tassieite to other Species

Structurally related to group(s):
Wicksite Group
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
(HPO
 
4
)
 
2
(H
 
2
PO
 
4
)
 
6
 · 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

    Hide Locality List
    (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)
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