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Nafertisite

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Formula:
Na
 
3
(Fe
2+
 
,Fe
3+
 
)
 
6
(Ti
 
2
Si
 
12
O
 
34
)(O,OH)
 
7
· 2H
 
2
O
System:MonoclinicLustre:Vitreous
Hardness:2 - 3
This page provides mineralogical data about Nafertisite.

Classification of Nafertisite

IMA status:Approved
Strunz 8th edition ID:8/G.13-10
Nickel-Strunz 10th (pending) edition ID:9.EH.30

9 : SILICATES (Germanates)
E : Phyllosilicates
H : Transitional structures between phyllosilicate and other silicate units
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Type Occurrence of Nafertisite

Type Locality:Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

Physical Properties of Nafertisite

Lustre:Vitreous
Hardness (Mohs):2 - 3

Crystallography of Nafertisite

Crystal System:Monoclinic

Optical Data of Nafertisite

Type:Biaxial (-)
RI values: nα = 1.627 nβ = 1.667 nγ = 1.693
2V:Measured: 75° to 76°, Calculated: 76°
Maximum Birefringence:δ = 0.066

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v or r < v

Chemical Properties of Nafertisite

Formula:
Na
 
3
(Fe
2+
 
,Fe
3+
 
)
 
6
(Ti
 
2
Si
 
12
O
 
34
)(O,OH)
 
7
· 2H
 
2
O
Simplified for copy/paste:Na3(Fe2+,Fe3+)6(Ti2Si12O34)(O,OH)7·2H2O
Essential elements:Fe, H, Na, O, Si, Ti
All elements listed in formula:Fe, H, Na, O, Si, Ti

Relationship of Nafertisite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EH.05Manganoneptunite
Na
 
2
KLi(Mn
2+
 
,Fe
2+
 
)
 
2
Ti
 
2
[Si
 
8
O
 
24
]
9.EH.05Neptunite
Na
 
2
KLi(Fe
2+
 
,Mn
2+
 
)
 
2
Ti
 
2
(Si
 
8
O
 
24
)
9.EH.05Watatsumiite
Na
 
2
KLi(Mn
2+
 
,Fe
2+
 
)
 
2
V
4+
2
[Si
 
8
O
 
24
]
9.EH.05Magnesioneptunite
KNa
 
2
Li(Mg,Fe)
 
2
Ti
 
2
Si
 
8
O
 
24
9.EH.10Grumantite
Na(HSi
 
2
O
 
5
) · H
 
2
O
9.EH.15Sarcolite
Na
 
2
Ca
 
12
(Ca,K,Fe,Sr,Mg)
 
2
Al
 
8
Si
 
12
(P,Si)O
 
52
F
 
2
9.EH.20Ussingite
Na
 
2
AlSi
 
3
O
 
8
OH
9.EH.25Leifite
(Na,H
 
2
O)Na
 
6
[Be
 
2
Al
 
2
(Al,Si)Si
 
15
O
 
39
]F
 
2
9.EH.25Telyushenkoite
(Cs,Na,K)Na
 
6
[F
 
2
|Be
 
2
Al
 
3
Si
 
15
O
 
39
]
9.EH.25Eirikite
KNa
 
6
Be
 
2
(Si
 
15
Al
 
3
)O
 
39
F
 
2

Other Names for Nafertisite

Synonyms:
IMA1994-007
Other Languages:
German:Nafertisit
Russian:Нафертисит
Spanish:Nafertisita

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 Nafertisite

Reference List:

- +
Mineralogical Record: 28: 143.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 124(6): 101-107.

European Journal of Mineralogy: 8: 241-249.

Petersen, O.V., Johnsen, O., Christiansen, C.C., Robinson, G.W. & Niedermayr, G. (1999): Nafertisite - Na3Fe10Ti2Si12(O,OH,F)43 - from the Nanna pegmatite, Narsaarsuup Qaava, South Greenland. Neues Jahrbuch für Mineralogie, Monatshefte, 1999, 303-310.

Internet Links for Nafertisite

Search Engines:
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  • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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  • Localities for Nafertisite

    (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.
    Greenland
     
    • Kitaa Province (West Greenland)
      • Narsaq
        • Igaliku (Igaliko)
          • Narssârssuk (Narsarsuk)
            • Narsaarsuup Qaava
    Petersen, O.V., Johnsen, O., Christiansen, C.C., Robinson, G.W. & Niedermayr, G. (1999): Nafertisite - Na3Fe10Ti2Si12(O,OH,F)43 - from the Nanna pegmatite, Narsaarsuup Qaava, South Greenland. Neues Jahrbuch für Mineralogie, Monatshefte, 1999, 303-310.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
    ZVMO,(1995) 124, n. 6, 101-107
    www.koeln.netsurf.de/~w.steffens/lovo.htm
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