Tinaksite
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Formula:
K2Na(Ca,Mn2+)2Ti[O|Si7O18(OH)]
System:
Triclinic
Colour:
Yellowish, grayish-white
Lustre:
Vitreous
Hardness:
6
Name:
The name reflects its composition: titanium (Ti), sodium (Na) potassium (K) and silicon (Si).
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
Vitreous
Colour:
Yellowish, grayish-white
Hardness (Mohs):
6
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.
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 Volume:
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
Relationship of Tinaksite to other Species
| 9.DG.05 | Bustamite | CaMn2+(Si2O6) |
| 9.DG.05 | Ferrobustamite | CaFe2+(Si2O6) |
| 9.DG.05 | Pectolite | NaCa2Si3O8(OH) |
| 9.DG.05 | Serandite | NaMn22+Si3O8(OH) |
| 9.DG.05 | Wollastonite | CaSiO3 |
| 9.DG.05 | Wollastonite-1A | CaSiO3 |
| 9.DG.07 | Cascandite | Ca(Sc,Fe3+)(HSi3O9) |
| 9.DG.08 | Plombièrite | [Ca4Si6O16(OH)2 · 2H2O]·(Ca·5H2O) |
| 9.DG.10 | Clinotobermorite | [Ca4Si6O17 · 2H2O]·(Ca·3H2O) |
| 9.DG.10 | Riversideite | Ca5(HSi3O9)2 · 2H2O |
| 9.DG.10 | Tobermorite | [Ca4Si6O17 · 2H2O]·(Ca·3H2O) |
| 9.DG.15 | Foshagite | Ca4(Si3O9)(OH)2 |
| 9.DG.20 | Jennite | Ca9(Si3O9)2(OH)8 · 8H2O |
| 9.DG.25 | Paraumbite | K3Zr2H(Si3O9)2 · nH2O |
| 9.DG.25 | Umbite | K2(Zr,Ti)Si3O9 · H2O |
| 9.DG.30 | Sørensenite | Na4SnBe2Si6O16(OH)4 |
| 9.DG.35 | Xonotlite | Ca6(Si6O17)(OH)2 |
| 9.DG.40 | Hillebrandite | Ca2(SiO3)(OH)2 |
| 9.DG.45 | Zorite | Na8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2O |
| 9.DG.45 | Chivruaiite | Ca4(Ti,Nb)5(Si6O17)2(OH,O)5 · 13-14H2O |
| 9.DG.50 | Haineaultite | (Na,Ca)5Ca(Ti,Nb)5(Si6O17)2(OH,F)8 · 5H2O |
| 9.DG.55 | Epididymite | Na2Be2Si6O15 · H2O |
| 9.DG.60 | Eudidymite | Na2Be2Si6O15 · H2O |
| 9.DG.65 | Elpidite | Na2ZrSi6O15 · 3H2O |
| 9.DG.70 | Fenaksite | (K,Na)4(Fe,Mn)2(Si4O10)2(OH,F) |
| 9.DG.70 | Litidionite | CuNaKSi4O10 |
| 9.DG.70 | Manaksite | KNaMnSi4O10 |
| 9.DG.75 | Tokkoite | K2Ca4[Si7O18(OH)](OH,F) |
| 9.DG.75 | Senkevichite | CsKNaCa2Ti[O|Si7O18(OH)] |
| 9.DG.80 | Canasite | K3Na3Ca5Si12O30(OH)4 |
| 9.DG.80 | Fluorcanasite | K3Na3Ca5Si12O30F4 · H2O |
| 9.DG.85 | Miserite | K1.5-x(Ca,Y,REE)5(Si6O15)(Si2O7)(OH,F)2 · yH2O |
| 9.DG.90 | Frankamenite | K3Na3Ca5(Si12O30)(F,OH)4 · H2O |
| 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 |
| 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 |
| 9.DG.97 | Eveslogite | (Na,K,Ca,Sr,Ba)48 [(Ti,Nb,Mn,Fe2+)12Si48O144(OH)12](F,OH,Cl)14 |
| 14.9.1 | Natisite | Na2Ti(SiO4)O |
| 14.9.2 | Lorenzenite | Na2Ti2(Si2O6)O3 |
| 14.9.3 | Lintisite | LiNa3Ti2(Si2O6)2O2 · 2H2O |
| 14.9.4 | Davanite | K2TiSi6O15 |
| 14.9.5 | Kazakovite | Na6Mn2+Ti(Si6O18) |
| 14.9.6 | Titanite | CaTi(SiO4)O |
| 14.9.7 | Ohmilite | Sr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2O |
| 14.9.8 | Lamprophyllite | (Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2 |
| 14.9.9 | Benitoite | BaTi(Si3O9) |
| 14.9.10 | Batisite | BaNaNaTi2(Si4O12)O2 |
| 14.9.11 | Fresnoite | Ba2Ti(Si2O7)O |
| 14.9.12 | Joaquinite-(Ce) | NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O |
| 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 |
| 14.9.15 | Bario-orthojoaquinite | (Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O |
| 14.9.16 | Strontio-orthojoaquinite | (Na,Fe)2Sr2Ba2Ti2[Si4O12]2O2(O,OH)2 · H2O |
| 14.9.17 | Bafertisite | Ba2Fe42+Ti2(Si2O72O2(OH)2F2 |
| 14.9.18 | Hejtmanite | Ba2(Mn2+,Fe2+)4Ti2(Si2O7)2O2(OH)2F2 |
| 14.9.19 | Delindeite | (Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O |
| 14.9.20 | Barytolamprophyllite | (Ba,Na)2(Na,Ti,Fe3+)4Ti2(Si2O7)2O(OH,F) |
| 14.9.21 | Trimounsite-(Y) | Y2Ti2(SiO4)O5 |
| 14.9.22 | Perrierite-(Ce) | Ce4MgFe23+Ti2(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 |
| 14.9.25 | Tisinalite | Na3H3(Mn,Ca,Fe)TiSi6(O,OH)18 · 2H2O |
| 14.9.26 | Neptunite | Na2KLiFe22+Ti2Si8O24 |
| 14.9.27 | Manganoneptunite | Na2KLiMn22+Ti2Si8O24 |
| 14.9.28 | Kupletskite | (K,Na)3(Mn,Fe)7Ti2Si8O26(OH)4F |
| 14.9.29 | Astrophyllite | K2NaFe72+Ti2Si8O28(OH)4F |
| 14.9.30 | Hydroastrophyllite | (H3O,K,Ca)3(Fe,Mn)5-65Ti2Si8(O,OH)31 |
| 14.9.31 | Lobanovite | K2Na(Fe42+Mg2Na)Ti2(Si4O12)2O2(OH)4 |
| 14.9.32 | Baratovite | KCa7(Ti,Zr)2Li3Si12O36F2 |
| 14.9.34 | Aenigmatite | Na2Fe52+Ti(Si6O18)O2 |
| 14.9.35 | Schorlomite | Ca3(Ti,Fe3+)2((Si,Fe3+)O4)3 |
| 14.9.37 | Janhaugite | (Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2 |
| 14.9.38 | Koashvite | Na6(Ca,Mn)(Ti,Fe)Si6O18 · H2O |
Other Names for Tinaksite
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 (items highlighted in red)
References for Tinaksite
Reference List:
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)
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
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Localities for Tinaksite
This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
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(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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 | |
| Vorob'yev E.I. (2008) Charoite, - Novosibirsk. GEO, p. 142 (in Rus.). |
| [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 | |
| 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 | |
| [Mandarino, 1997] |
| P.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, Eastern-Siberian Region, Russia