Sitinakite
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About Sitinakite
Formula:
KNa2Ti4(SiO4)2O5(OH) · 4H2O
Colour:
Colourless, light-brown to pale rose, pinkish brown
Lustre:
Vitreous
Hardness:
4½
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.
Classification of Sitinakite
Approved
Approval Year:
1989
8/B.16-30
9.AG.30
9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
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
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 Sitinakite
Vitreous
Transparency:
Transparent, Translucent
Colour:
Colourless, light-brown to pale rose, pinkish brown
Hardness:
4½ on Mohs scale
Optical Data of Sitinakite
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.
and does not take into account mineral colouration.
Surface Relief:
Very High
Chemical Properties of Sitinakite
Formula:
KNa2Ti4(SiO4)2O5(OH) · 4H2O
IMA Formula:
KNa2Ti4Si2O13(OH) · 4H2O
Common Impurities:
Ca,Sr,Ba,Ce,Fe,Nb,Ta,Zr,TR
Crystallography of Sitinakite
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 Sitinakite
Synonyms of Sitinakite
Other Language Names for Sitinakite
Common Associates
Associated Minerals Based on Photo Data:
| Sazykinaite-(Y) | 3 photos of Sitinakite associated with Sazykinaite-(Y) on mindat.org. |
| Lemmleinite-K | 3 photos of Sitinakite associated with Lemmleinite-K on mindat.org. |
| Rhabdophane-(Ce) | 1 photo of Sitinakite associated with Rhabdophane-(Ce) on mindat.org. |
| Deloneite | 1 photo of Sitinakite associated with Deloneite on mindat.org. |
| Aegirine | 1 photo of Sitinakite associated with Aegirine on mindat.org. |
Related Minerals - Nickel-Strunz Grouping
| 9.AG. | Edgrewite | Ca9(SiO4)4F2 | Mon. 2/m : P21/b |
| 9.AG.05 | Abswurmbachite | CuMn3+6(SiO4)O8 | Tet. 4/mmm (4/m 2/m 2/m) : I41/acd |
| 9.AG.05 | Braunite | Mn2+Mn3+6(SiO4)O8 | Tet. 4/mmm (4/m 2/m 2/m) : I41/acd |
| 9.AG.05 | Neltnerite | CaMn3+6(SiO4)O8 | Tet. 4/mmm (4/m 2/m 2/m) : I41/acd |
| 9.AG.05 | Braunite-II | CaMn3+14(SiO4)O20 | Tet. 4/mmm (4/m 2/m 2/m) : I41/acd |
| 9.AG.10 | Långbanite | Mn2+4Mn3+9Sb5+O16(SiO4)2 | Trig. 3m : P3m1 |
| 9.AG.15 | Malayaite | CaSn(SiO4)O | Mon. |
| 9.AG.15 | Titanite | CaTi(SiO4)O | Mon. 2/m : P21/b |
| 9.AG.15 | Vanadomalayaite | CaV4+(SiO4)O | Mon. |
| 9.AG.15 | Natrotitanite | (Na0.5Y0.5)Ti(SiO4)O | Mon. 2/m : B2/b |
| 9.AG.15 | Żabińskiite | Ca[Al0.5(Ta,Nb)0.5)](SiO4)O | Tric. 1 |
| 9.AG.20 | Cerite-(Ce) | (Ce,Ca)9(Mg,Fe)(SiO4)3(HSiO4)4(OH)3 | Trig. 3m : R3c |
| 9.AG.20 | Cerite-(La) | (La,Ce,Ca)9(Fe,Ca,Mg)(SiO4)3(HSiO4)4(OH)3 | Trig. 3m : R3c |
| 9.AG.20 | Aluminocerite-(Ce) | (Ce,La,Ca)9(Al,Fe3+)(SiO4)3(HSiO4)4(OH)3 | Trig. 3m : R3c |
| 9.AG.25 | Trimounsite-(Y) | Y2Ti2(SiO4)O5 | Mon. |
| 9.AG.25 | Yftisite-(Y) | (Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6 | |
| 9.AG.25 | Mieite-(Y) | Y4Ti(SiO4)2O[F,(OH)]6 | Orth. mmm (2/m 2/m 2/m) : Cmcm |
| 9.AG.35 | Kittatinnyite | Ca2Mn2Mn(SiO4)2(OH)4 · 9H2O | Hex. |
| 9.AG.40a | Natisite | Na2Ti(SiO4)O | Tet. |
| 9.AG.40b | Paranatisite | Na2Ti(SiO4)O | Orth. |
| 9.AG.45 | Törnebohmite-(Ce) | (Ce,La)2Al(SiO4)2(OH) | |
| 9.AG.45 | Törnebohmite-(La) | (La,Ce)2Al(SiO4)2(OH) | |
| 9.AG.50 | Kuliokite-(Y) | Y4Al(SiO4)2(OH)2F5 | |
| 9.AG.55 | Chantalite | CaAl2(SiO4)(OH)4 | Tet. 4/m : I41/a |
| 9.AG.60 | Mozartite | CaMn3+(SiO4)(OH) | Orth. 2 2 2 : P21 21 21 |
| 9.AG.60 | Vuagnatite | CaAl(SiO4)(OH) | Orth. |
| 9.AG.65 | Hatrurite | Ca3(SiO4)O | Trig. |
| 9.AG.70 | Jasmundite | Ca11(SiO4)4O2S | Tet. 4 2m : I4m2 |
| 9.AG.75 | Afwillite | Ca3(HSiO4)2 · 2H2O | Mon. m : Bb |
| 9.AG.80 | Bultfonteinite | Ca2(HSiO4)F · H2O | Tric. |
| 9.AG.85 | Zoltaiite | BaV4+2V3+12(SiO4)2O19 | Trig. 3 : P3 |
| 9.AG.90 | Tranquillityite | (Fe2+,Ca)8(Zr,Y)2Ti3(SiO4)3O12 | Hex. |
Other Information
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 Sitinakite
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 Sitinakite
mindat.org URL:
https://www.mindat.org/min-3677.html
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Localities for Sitinakite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Russia | |
| 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 | |
| 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 |
Kukisvumchorr Mt, Khibiny Massif, Murmanskaya Oblast', Northern Region, Russia