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Sitinakite

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Formula:
KNa2Ti4(SiO4)2O5(OH) · 4H2O
Colour:
Colourless, light-brown to pale rose, pinkish brown
Lustre:
Vitreous
Hardness:
Crystal System:
Tetragonal
Name:
The name reflects its composition: silicon (Si), titanium (Ti), sodium (Na) and potassium (K).
This page provides mineralogical data about Sitinakite.


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Classification of SitinakiteHide

Approved
Approval Year:
1989
9.AG.30

9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
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

Physical Properties of SitinakiteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Colourless, light-brown to pale rose, pinkish brown
Hardness:
4½ on Mohs scale

Optical Data of SitinakiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.780 nε = 1.988
Max Birefringence:
δ = 0.208
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of SitinakiteHide

Formula:
KNa2Ti4(SiO4)2O5(OH) · 4H2O
IMA Formula:
KNa2Ti4Si2O13(OH) · 4H2O
Common Impurities:
Ca,Sr,Ba,Ce,Fe,Nb,Ta,Zr,TR

Crystallography of SitinakiteHide

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

Type Occurrence of SitinakiteHide

Synonyms of SitinakiteHide

Other Language Names for SitinakiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Sazykinaite-(Y)3 photos of Sitinakite associated with Sazykinaite-(Y) on mindat.org.
Lemmleinite-K3 photos of Sitinakite associated with Lemmleinite-K on mindat.org.
Rhabdophane-(Ce)1 photo of Sitinakite associated with Rhabdophane-(Ce) on mindat.org.
Deloneite1 photo of Sitinakite associated with Deloneite on mindat.org.
Aegirine1 photo of Sitinakite associated with Aegirine on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.AG.05AbswurmbachiteCuMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05BrauniteMn2+Mn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05NeltneriteCaMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05Braunite-IICaMn3+14(SiO4)O20Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.10LångbaniteMn2+4Mn3+9Sb5+O16(SiO4)2Trig. 3m : P3m1
9.AG.15MalayaiteCaSn(SiO4)OMon.
9.AG.15TitaniteCaTi(SiO4)OMon. 2/m : P21/b
9.AG.15VanadomalayaiteCaV4+(SiO4)OMon.
9.AG.15Natrotitanite(Na0.5Y0.5)Ti(SiO4)OMon. 2/m : B2/b
9.AG.15ŻabińskiiteCa[Al0.5(Ta,Nb)0.5)](SiO4)OTric. 1
9.AG.20Cerite-(Ce)(Ce,Ca)9(Mg,Fe)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
9.AG.20Cerite-(La)(La,Ce,Ca)9(Fe,Ca,Mg)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
9.AG.20Aluminocerite-(Ce)(Ce,La,Ca)9(Al,Fe3+)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
9.AG.25Trimounsite-(Y)Y2Ti2(SiO4)O5Mon.
9.AG.25Yftisite-(Y)(Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6
9.AG.25Mieite-(Y)Y4Ti(SiO4)2O[F,(OH)]6Orth. mmm (2/m 2/m 2/m) : Cmcm
9.AG.35KittatinnyiteCa2Mn2Mn(SiO4)2(OH)4 · 9H2OHex.
9.AG.40aNatisiteNa2Ti(SiO4)OTet.
9.AG.40bParanatisiteNa2Ti(SiO4)OOrth.
9.AG.45Törnebohmite-(Ce)(Ce,La)2Al(SiO4)2(OH)
9.AG.45Törnebohmite-(La)(La,Ce)2Al(SiO4)2(OH)
9.AG.50Kuliokite-(Y)Y4Al(SiO4)2(OH)2F5
9.AG.55ChantaliteCaAl2(SiO4)(OH)4Tet. 4/m : I41/a
9.AG.60MozartiteCaMn3+(SiO4)(OH)Orth. 2 2 2 : P21 21 21
9.AG.60VuagnatiteCaAl(SiO4)(OH)Orth.
9.AG.65HatruriteCa3(SiO4)OTrig.
9.AG.70JasmunditeCa11(SiO4)4O2STet. 4 2m : I4m2
9.AG.75AfwilliteCa3(HSiO4)2 · 2H2OMon. m : Bb
9.AG.80BultfonteiniteCa2(HSiO4)F · H2OTric.
9.AG.85ZoltaiiteBaV4+2V3+12(SiO4)2O19Trig. 3 : P3
9.AG.90Tranquillityite(Fe2+,Ca)8(Zr,Y)2Ti3(SiO4)3O12Hex.

Other InformationHide

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

References for SitinakiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 SitinakiteHide

Localities for SitinakiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia
 
  • Northern Region
    • Murmanskaya Oblast'
      • Khibiny Massif
        • Koashva Mt
Arzamastsev, A., Yakovenchuk, V., Pakhomovsky, Y., & Ivanyuk, G. (2008). The Khibina and Lovozero alkaline massifs: Geology and unique mineralization. In Guidbook for 33rd International Geological Congress Excursion (No. 47, p. 58).
[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
Mineral and/or Locality  
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