Tinaksite
This page is currently not sponsored. Click here to sponsor this page.
About Tinaksite
Formula:
K2Na(Ca,Mn2+)2Ti[O|Si7O18(OH)]
Colour:
Yellowish, grayish-white
Lustre:
Vitreous
Hardness:
6
Crystal System:
Triclinic
Name:
The name reflects its composition: titanium (Ti), sodium (Na) potassium (K) and silicon (Si).
Type Locality:
Isostructural with:
The K analogue of senkevichite. Chemically somewhat similar to faizievite and odintsovite. When compared to tokkoite, it has smaller lattice constants (mainly the parameter b), shorter distances, shorter M1-M3 and O20-O2 bonds, and less distorted M1 polyhedron. There is some Fe3+ in the structure.
Classification of Tinaksite
Approved
8/F.22-30
9.DG.75
9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains
9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains
67.2.1.1
67 : INOSILICATES Unbranched Chains with W > 2
2 : Unbranched Chains with W>2 with W=5
67 : INOSILICATES Unbranched Chains with W > 2
2 : Unbranched Chains with W>2 with W=5
14.9.36
14 : Silicates not Containing Aluminum
9 : Silicates of Ti
14 : Silicates not Containing Aluminum
9 : Silicates of Ti
Physical Properties of Tinaksite
Optical Data of Tinaksite
Type:
Biaxial (+)
RI values:
nα = 1.593 nβ = 1.621 nγ = 1.666
Max Birefringence:
δ = 0.073

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:
Moderate
Dispersion:
none
Chemical Properties of Tinaksite
Formula:
K2Na(Ca,Mn2+)2Ti[O|Si7O18(OH)]
IMA Formula:
K2NaCa2TiSi7O18(OH)O
Common Impurities:
Al,Fe,Mg,H2O
Crystallography of Tinaksite
Crystal System:
Triclinic
Cell Parameters:
a = 10.37 Å, b = 12.16 Å, c = 7.05 Å
α = 90.91°, β = 99.31°, γ = 92.76°
α = 90.91°, β = 99.31°, γ = 92.76°
Ratio:
a:b:c = 0.853 : 1 : 0.58
Unit Cell V:
876.02 ų (Calculated from Unit Cell)
Comment:
mean parameters concerning the structure refinement (Lacalamita et al., 2016): a~10.373, b~12.176, c~7.057, α~90.82, β~99.22, γ~92.80, V~878.5
Type Occurrence of Tinaksite
Other Language Names for Tinaksite
Common Associates
Associated Minerals Based on Photo Data:
Charoite | 58 photos of Tinaksite associated with Charoite on mindat.org. |
Aegirine | 39 photos of Tinaksite associated with Aegirine on mindat.org. |
Fedorite | 7 photos of Tinaksite associated with Fedorite on mindat.org. |
Pectolite | 5 photos of Tinaksite associated with Pectolite on mindat.org. |
Frankamenite | 5 photos of Tinaksite associated with Frankamenite on mindat.org. |
Steacyite | 3 photos of Tinaksite associated with Steacyite on mindat.org. |
Magnesio-arfvedsonite | 2 photos of Tinaksite associated with Magnesio-arfvedsonite on mindat.org. |
Strontioburbankite | 2 photos of Tinaksite associated with Strontioburbankite on mindat.org. |
Lamprophyllite | 1 photo of Tinaksite associated with Lamprophyllite on mindat.org. |
Eudialyte | 1 photo of Tinaksite associated with Eudialyte on mindat.org. |
Related Minerals - Nickel-Strunz Grouping
9.DG.05 | Bustamite | CaMn2+(Si2O6) | Tric. 1 : P1 |
9.DG.05 | Ferrobustamite | CaFe2+(Si2O6) | Tric. |
9.DG.05 | Pectolite | NaCa2Si3O8(OH) | Tric. 1 : P1 |
9.DG.05 | Serandite | NaMn2+2Si3O8(OH) | Tric. 1 : P1 |
9.DG.05 | Wollastonite | CaSiO3 | Tric. 1 : P1 |
9.DG.05 | Wollastonite-1A | CaSiO3 | Tric. |
9.DG.07 | Cascandite | Ca(Sc,Fe3+)(HSi3O9) | Tric. 1 |
9.DG.08 | Plombièrite | [Ca4Si6O16(OH)2 · 2H2O]·(Ca·5H2O) | Orth. |
9.DG.10 | Clinotobermorite | [Ca4Si6O17 · 2H2O]·(Ca·3H2O) | Mon. |
9.DG.10 | Riversideite | Ca5(HSi3O9)2 · 2H2O | Orth. |
9.DG.10 | Tobermorite | [Ca4Si6O17 · 2H2O]·(Ca·3H2O) | Orth. |
9.DG.15 | Foshagite | Ca4(Si3O9)(OH)2 | Tric. |
9.DG.20 | Jennite | Ca9(Si3O9)2(OH)8 · 8H2O | Tric. |
9.DG.25 | Paraumbite | K3Zr2H(Si3O9)2 · nH2O | Orth. |
9.DG.25 | Umbite | K2(Zr,Ti)Si3O9 · H2O | Orth. |
9.DG.30 | Sørensenite | Na4SnBe2Si6O16(OH)4 | Mon. 2/m : B2/b |
9.DG.35 | Xonotlite | Ca6(Si6O17)(OH)2 | Mon. 2/m |
9.DG.40 | Hillebrandite | Ca2(SiO3)(OH)2 | Orth. mmm (2/m 2/m 2/m) : Cmcm |
9.DG.45 | Zorite | Na8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2O | Orth. |
9.DG.45 | Chivruaiite | Ca4(Ti,Nb)5(Si6O17)2(OH,O)5 · 13-14H2O | Orth. mmm (2/m 2/m 2/m) : Cmmm |
9.DG.50 | Haineaultite | (Na,Ca)5Ca(Ti,Nb)5(Si6O17)2(OH,F)8 · 5H2O | Orth. 2 2 2 : C2 2 2 |
9.DG.55 | Epididymite | Na2Be2Si6O15 · H2O | Orth. mmm (2/m 2/m 2/m) : Pnma |
9.DG.60 | Eudidymite | Na2Be2Si6O15 · H2O | Mon. 2/m : B2/b |
9.DG.65 | Elpidite | Na2ZrSi6O15 · 3H2O | Orth. |
9.DG.70 | Fenaksite | (K,Na)4(Fe,Mn)2(Si4O10)2(OH,F) | Tric. |
9.DG.70 | Litidionite | CuNaKSi4O10 | Tric. |
9.DG.70 | Manaksite | KNaMnSi4O10 | Tric. |
9.DG.75 | Tokkoite | K2Ca4[Si7O18(OH)](OH,F) | Tric. |
9.DG.75 | Senkevichite | CsKNaCa2Ti[O|Si7O18(OH)] | Tric. 1 : P1 |
9.DG.80 | Canasite | K3Na3Ca5Si12O30(OH)4 | |
9.DG.80 | Fluorcanasite | K3Na3Ca5Si12O30F4 · H2O | Mon. m : Bm |
9.DG.85 | Miserite | K1.5-x(Ca,Y,REE)5(Si6O15)(Si2O7)(OH,F)2 · yH2O | Tric. |
9.DG.90 | Frankamenite | K3Na3Ca5(Si12O30)(F,OH)4 · H2O | Tric. |
9.DG.92 | Charoite | (K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2O | Mon. 2/m : P21/m |
9.DG.95 | Yuksporite | K4(Ca,Na)14(Sr,Ba)2(⃞,Mn,Fe)(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3(H2O,OH)3 | Orth. |
9.DG.97 | Eveslogite | (Na,K,Ca,Sr,Ba)48 [(Ti,Nb,Mn,Fe2+)12Si48O144(OH)12](F,OH,Cl)14 | Mon. 2/m : P2/m |
Related Minerals - Dana Grouping (8th Ed.)
67.2.1.2 | Tokkoite | K2Ca4[Si7O18(OH)](OH,F) | Tric. |
Related Minerals - Hey's Chemical Index of Minerals Grouping
14.9.1 | Natisite | Na2Ti(SiO4)O | Tet. |
14.9.2 | Lorenzenite | Na2Ti2(Si2O6)O3 | Orth. mmm (2/m 2/m 2/m) : Pbcn |
14.9.3 | Lintisite | LiNa3Ti2(Si2O6)2O2 · 2H2O | Mon. |
14.9.4 | Davanite | K2TiSi6O15 | Tric. |
14.9.5 | Kazakovite | Na6Mn2+Ti(Si6O18) | Trig. |
14.9.6 | Titanite | CaTi(SiO4)O | Mon. 2/m : P21/b |
14.9.7 | Ohmilite | Sr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2O | Mon. |
14.9.8 | Lamprophyllite | (Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2 | Mon. |
14.9.9 | Benitoite | BaTi(Si3O9) | Hex. 6 m2 : P62c |
14.9.10 | Batisite | BaNaNaTi2(Si4O12)O2 | Orth. |
14.9.11 | Fresnoite | Ba2Ti(Si2O7)O | Tet. |
14.9.12 | Joaquinite-(Ce) | NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O | Mon. 2 : B2 |
14.9.13 | Orthojoaquinite-(Ce) | NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O | |
14.9.14 | Strontiojoaquinite | Sr2Ba2(Na,Fe)2Ti2[Si4O12]2O2(O,OH)2 · H2O | Mon. |
14.9.15 | Bario-orthojoaquinite | (Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O | Orth. |
14.9.16 | Strontio-orthojoaquinite | (Na,Fe)2Sr2Ba2Ti2[Si4O12]2O2(O,OH)2 · H2O | Orth. |
14.9.17 | Bafertisite | Ba2Fe2+4Ti2(Si2O7)2O2(OH)2F2 | Tric. |
14.9.18 | Hejtmanite | Ba2(Mn2+,Fe2+)4Ti2(Si2O7)2O2(OH)2F2 | Tric. 1 |
14.9.19 | Delindeite | (Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O | Mon. |
14.9.20 | Barytolamprophyllite | (Ba,Na)2(Na,Ti,Fe3+)4Ti2(Si2O7)2O(OH,F) | Mon. |
14.9.21 | Trimounsite-(Y) | Y2Ti2(SiO4)O5 | Mon. |
14.9.22 | Perrierite-(Ce) | Ce4MgFe3+2Ti2(Si2O7)2O8 | |
14.9.23 | Chevkinite | (Ce,Ca,Th)4(Fe,Mn)2(Ti,Fe)3[Si2O7]2O8 | |
14.9.24 | Strontiochevkinite | (Sr,La,Ce,Ca)4Fe2+(Ti,Zr)2Ti2(Si2O7)2O8 | Mon. |
14.9.25 | Tisinalite | Na3H3(Mn,Ca,Fe)TiSi6(O,OH)18 · 2H2O | Trig. |
14.9.26 | Neptunite | Na2KLiFe2+2Ti2Si8O24 | Mon. m : Bb |
14.9.27 | Manganoneptunite | Na2KLiMn2+2Ti2Si8O24 | Mon. |
14.9.28 | Kupletskite | (K,Na)3(Mn,Fe)7Ti2Si8O26(OH)4F | Tric. |
14.9.29 | Astrophyllite | K2NaFe2+7Ti2Si8O28(OH)4F | Tric. 1 : P1 |
14.9.30 | Hydroastrophyllite | (H3O,K,Ca)3(Fe,Mn)5-65Ti2Si8(O,OH)31 | Tric. |
14.9.31 | Lobanovite | K2Na(Fe2+4Mg2Na)Ti2(Si4O12)2O2(OH)4 | Mon. 2/m : B2/m |
14.9.32 | Baratovite | KCa7(Ti,Zr)2Li3Si12O36F2 | Mon. 2/m : B2/b |
14.9.34 | Aenigmatite | Na4[Fe2+10Ti2]O4[Si12O36] | Tric. 1 : P1 |
14.9.35 | Schorlomite | Ca3(Ti,Fe3+)2((Si,Fe3+)O4)3 | Iso. |
14.9.37 | Janhaugite | (Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2 | Mon. 2/m : P21/m |
14.9.38 | Koashvite | Na6(Ca,Mn)(Ti,Fe)Si6O18 · H2O | Orth. |
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.
Tinaksite in petrology
An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.
References for Tinaksite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Doklady Akademii Nauk SSSR (1965): 162: 658-661.
American Mineralogist (1965): 50: 2098-2099.
Acta Crystallographica: B36: 259-263.
Mineralogicheskii Zhurnal, Kiev: 13(4): 3-12.
Zeitschrift für Kristallographie (1987): 189: 195.
Lacalamita, M., Mesto, E., Kaneva, E., Scordari, F., Pedrazzi, G., Vladkyn, N., Schingaro, E. (2016): Structure refinement and crystal chemistry of tokkoite and tinaksite from Murun massif (Russia). Mineralogical Magazine: 80 (in press); http://forum.amiminerals.it/viewtopic.php?f=5&t=12645 (2016)
Internet Links for Tinaksite
mindat.org URL:
https://www.mindat.org/min-3966.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
Localities for Tinaksite
Locality List




All localities listed without proper references should be considered as questionable.
Russia | |
| Vorob'yev E.I. (2008) Charoite, - Novosibirsk. GEO, p. 142 (in Rus.). |
| P.M. Kartashov data |
| [Mandarino, 1997] |
| [Lapis 1993:4 p.13-20]; 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 |
Pavel M. Kartashov data; Solyanik, V. A., Pakhomova, V. A., & Ushkova, M. A. (2008). Charoite–a champion among mineralogical discoveries in the second half of the 20th century. The Journal of the Gemmological Association of Hong Kong, 29, 77-80. | |
Natural History Museum Vienna collection | |
Konev, A.A., Vorob'yev, E.I., and Lazebnik, K.A. (1996) The Mineralogy of the Murun Massif. Russian Academy of Science Press, Siberian Branch, Novosbirsk, Russia (in Rus.); Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow | |
Vorob'yov E.I. (2008) Charoite, - Novosibirsk. GEO, p. 142 (in Rus.). | |
Vorob'yov E.I. (2008) Charoite, - Novosibirsk. GEO, p. 142 (in Rus.). | |
Pavel M. Kartashov data | |
Saudi Arabia | |
| Faheha, A. A., Hamidalddin, S. Q., Al-Turkestany, N. A., & Ibraheim, N. M. (2012). Concentrations Of Natural And Man-Made Radioactivity Of Surface Soil In Al-Madinh Al-Monawarah, Western Province of Saudi Arabia. Isotope and Radiation Research, 44(2), 495-504. |
Murunskii Massif, Chara and Tokko Rivers Confluence, Aldan Shield, Sakha Republic, Russia