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Sitinakite

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Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
© O. Dziallas

Show Sitinakite Photos (8)
Formula:
KNa
 
2
Ti
 
4
Si
 
2
O
 
13
(OH)·2H
 
2
O
System:TetragonalColour:Colourless, light-brown ...
Hardness:4½
Name:The name reflects its composition: silicon (Si), titanium (Ti), sodium (Na) and potassium (K).
This page provides mineralogical data about Sitinakite.

Classification of Sitinakite

IMA status:Approved 1989
Strunz 8th edition ID:8/B.16-30
Nickel-Strunz 10th (pending) edition ID:9.AG.30

9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
Dana 8th edition ID:52.4.11.1

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
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Type Occurrence of Sitinakite

Co-type Localities:Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Yukspor Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Year of Discovery:1992

Physical Properties of Sitinakite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colourless, light-brown to pale rose, pinkish brown
Hardness (Mohs):4½

Crystallography of Sitinakite

Crystal System:Tetragonal
Cell Parameters:a = 7.81Å, c = 12.09Å
Ratio:a:c = 1 : 1.548
Unit Cell Volume:V 737.44 ų (Calculated from Unit Cell)

Optical Data of Sitinakite

Type:Uniaxial (+)
RI values: nω = 1.780 nε = 1.988
Maximum Birefringence:δ = 0.208

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High

Chemical Properties of Sitinakite

Formula:
KNa
 
2
Ti
 
4
Si
 
2
O
 
13
(OH)·2H
 
2
O
Essential elements:H, K, Na, O, Si, Ti
All elements listed in formula:H, K, Na, O, Si, Ti
Common Impurities:Ca,Sr,Ba,Ce,Fe,Nb,Ta,Zr,TR

Relationship of Sitinakite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.AG.05Abswurmbachite
CuMn
3+
6
O
 
8
(SiO
 
4
)
9.AG.05Braunite
Mn
2+
 
Mn
3+
6
[O
 
8
|SiO
 
4
]
9.AG.05Neltnerite
CaMn
3+
6
[O
 
8
|SiO
 
4
]
9.AG.10Långbanite
(Mn
2+
 
,Ca)
 
4
(Mn
3+
 
,Fe
3+
 
)
 
9
Sb
5+
 
[O
 
8
|SiO
 
4
]
 
2
9.AG.15Malayaite
CaSn[O|SiO
 
4
]
9.AG.15Titanite
CaTi[O|SiO
 
4
]
9.AG.15Vanadomalayaite
CaV
4+
 
[O|SiO
 
4
]
9.AG.20Cerite-(Ce)
(Ce,Ca)
 
9
(Mg,Fe)Si
 
7
(O,OH,F)
 
28
9.AG.20Cerite-(La)
(La,Ce,Ca)
 
9
(Fe,Ca,Mg)(SiO
 
4
)
 
3
[SiO
 
3
(OH)]
 
4
(OH)
 
3
9.AG.25Trimounsite-(Y)
Y
 
2
Ti
 
2
[O
 
5
|SiO
 
4
]
9.AG.25Yftisite-(Y)
(Y,Dy,Er)
 
4
(Ti,Sn)O(SiO
 
4
)
 
2
(F,OH)
 
6
9.AG.35Kittatinnyite
Ca
 
2
Mn
 
2
Mn(SiO
 
4
)
 
2
(OH)
 
4
·9H
 
2
O
9.AG.40Natisite
Na
 
2
Ti[O|SiO
 
4
]
9.AG.40Paranatisite
Na
 
2
Ti[O|SiO
 
4
]
9.AG.45Törnebohmite-(Ce)
(Ce,La)
 
2
Al(SiO
 
4
)
 
2
OH
9.AG.45Törnebohmite-(La)
(La,Ce)
 
2
Al(SiO
 
4
)
 
2
OH
9.AG.50Kuliokite-(Y)
Y
 
4
Al(SiO
 
4
)
 
2
(OH)
 
2
F
 
5
9.AG.55Chantalite
CaAl
 
2
[(OH)
 
4
|SiO
 
4
]
9.AG.60Mozartite
CaMn
3+
 
[OH|SiO
 
4
]
9.AG.60Vuagnatite
CaAl[OH|SiO
 
4
]
9.AG.65Hatrurite
Ca
 
3
[O|SiO
 
4
]
9.AG.70Jasmundite
Ca
 
11
[O
 
2
|S|(SiO
 
4
)
 
4
]
9.AG.75Afwillite
Ca
 
3
[HSiO
 
4
]
 
2
 · 2H
 
2
O
9.AG.80Bultfonteinite
Ca
 
2
[F|HSiO
 
4
] · H
 
2
O
9.AG.85Zoltaiite
BaV
4+
2
V
3+
12
Si
 
2
O
 
27
9.AG.90Tranquillityite
(Fe
2+
 
,Ca)
 
8
(Zr,Y)
 
2
Ti
 
3
[O
 
4
|SiO
 
4
]
 
3

Other Names for Sitinakite

Synonyms:
IMA1989-051
Other Languages:
German:Sitinakit
Russian:Ситинакит
Spanish:Sitinakita

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 Sitinakite

Reference List:Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1992): 121(1): 94-99.

New Minerals (1997), New Minerals 1990-1994.

Articles/Blogs about Sitinakite

Internet Links for Sitinakite

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    Localities for Sitinakite

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    The 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.
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    (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.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
    		[AmMin 85:1844]
    Mineral and/or Locality
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