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Sitinakite

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

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Formula:
KNa
 
2
Ti
 
4
(SiO
 
4
)
 
2
O
 
5
(OH) · 4H
 
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:Kirovskii apatite mine (Kirovsky Mine; Kirovskii Mine; Kirov Mine), 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:1989

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
(SiO
 
4
)
 
2
O
 
5
(OH) · 4H
 
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
(SiO
 
4
)O
 
8
9.AG.05Braunite
Mn
2+
 
Mn
3+
6
(SiO
 
4
)O
 
8
9.AG.05Neltnerite
CaMn
3+
6
(SiO
 
4
)O
 
8
9.AG.05Braunite-II
CaMn
3+
14
(SiO
 
4
)O
 
20
9.AG.10Långbanite
(Mn
2+
 
,Ca)
 
4
(Mn
3+
 
,Fe
3+
 
)
 
9
Sb
5+
 
(SiO
 
4
)
 
2
O
 
16
9.AG.15Malayaite
CaSn(SiO
 
4
)O
9.AG.15Titanite
CaTi(SiO
 
4
)O
9.AG.15Vanadomalayaite
CaV
4+
 
(SiO
 
4
)O
9.AG.15Natrotitanite
(Na
 
0.5
Y
 
0.5
)Ti(SiO
 
4
)O
9.AG.20Cerite-(Ce)
(Ce,Ca)
 
9
(Mg,Fe)(SiO
 
4
)
 
3
(HSiO
 
4
)
 
4
(OH)
 
3
9.AG.20Cerite-(La)
(La,Ce,Ca)
 
9
(Fe,Ca,Mg)(SiO
 
4
)
 
3
(HSiO
 
4
)
 
4
(OH)
 
3
9.AG.20Aluminocerite-(Ce)
(Ce,La,Ca)
 
9
(Al,Fe
3+
 
)(SiO
 
4
)
 
3
(HSiO
 
4
)
 
4
(OH)
 
3
9.AG.25Trimounsite-(Y)
Y
 
2
Ti
 
2
(SiO
 
4
)O
 
5
9.AG.25Yftisite-(Y)
(Y,Dy,Er)
 
4
(Ti,Sn)(SiO
 
4
)
 
2
O(F,OH)
 
6
9.AG.35Kittatinnyite
Ca
 
2
Mn
 
2
Mn(SiO
 
4
)
 
2
(OH)
 
4
 · 9H
 
2
O
9.AG.40aNatisite
Na
 
2
Ti(SiO
 
4
)O
9.AG.40bParanatisite
Na
 
2
Ti(SiO
 
4
)O
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
(SiO
 
4
)(OH)
 
4
9.AG.60Mozartite
CaMn
3+
 
(SiO
 
4
)(OH)
9.AG.60Vuagnatite
CaAl(SiO
 
4
)(OH)
9.AG.65Hatrurite
Ca
 
3
(SiO
 
4
)O
9.AG.70Jasmundite
Ca
 
11
(SiO
 
4
)
 
4
O
 
2
S
9.AG.75Afwillite
Ca
 
3
(HSiO
 
4
)
 
2
 · 2H
 
2
O
9.AG.80Bultfonteinite
Ca
 
2
(HSiO
 
4
)F · H
 
2
O
9.AG.85Zoltaiite
BaV
4+
2
V
3+
12
(SiO
 
4
)
 
2
O
 
19
9.AG.90Tranquillityite
(Fe
2+
 
,Ca)
 
8
(Zr,Y)
 
2
Ti
 
3
(SiO
 
4
)
 
3
O
 
4

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.

Damodara M. Poojary, Roy A. Cahill, Abraham Clearfield (1994): Synthesis, Crystal Structures, and Ion-Exchange Properties of a Novel Porous Titanosilicate. Chem. Mater., 6, 2364–2368.

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

Gordon J. Thorogood, Brendan J. Kennedy, Christopher S. Griffith, Maragaret M. Elcombe, Maxim Avdeev, John V. Hanna, Samantha K. Thorogood, and Vittorio Luca (2010): Structure and Phase Transformations in the Titanosilicate, Sitinakite. The Importance of Water. Chemistry of Materials 22, 4222–4231.

Internet Links for Sitinakite

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    • Localities for Sitinakite

    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]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; American Mineralogist, Volume 94, pages 1450–1458, 2009
            • Kukisvumchorr Mt
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
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