Tinaksite
A valid IMA mineral species
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About Tinaksite
Formula:
K2Na(Ca,Mn2+)2TiO[Si7O18(OH)]
Colour:
Yellowish, grayish-white
Lustre:
Vitreous
Hardness:
6
Specific Gravity:
2.82 - 2.90
Crystal System:
Triclinic
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.
Unique Identifiers
Mindat ID:
3966
Long-form identifier:
mindat:1:1:3966:2
GUID
(UUID V4):
(UUID V4):
68683f1a-cde8-4fd7-8d09-18133d07ec2c
IMA Classification of Tinaksite
Classification of Tinaksite
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
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Tnk | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Tinaksite
Vitreous
Transparency:
Transparent, Translucent
Colour:
Yellowish, grayish-white
Hardness:
6 on Mohs scale
Cleavage:
Perfect
Perfect on {010}, imperfect on {110}; (010) ∧ (110) =
131.5°.
Perfect on {010}, imperfect on {110}; (010) ∧ (110) =
131.5°.
Density:
2.82 - 2.90 g/cm3 (Measured) 2.85 g/cm3 (Calculated)
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
Optical Extinction:
X' ∧ {010} = 1°-4°; Y ∧ {010} = 16°-18°.
Chemistry of Tinaksite
Mindat Formula:
K2Na(Ca,Mn2+)2TiO[Si7O18(OH)]
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
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0009701 | Tinaksite | Bissert G (1980) Verfeinerung der struktur von tinaksit, Ca2K2NaTiO[Si7O18(OH)] Acta Crystallographica B36 259-263 | 1980 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.03 Å | (100) |
3.25 Å | (80) |
2.331 Å | (55) |
3.09 Å | (50) |
2.952 Å | (50) |
2.865 Å | (50) |
2.674 Å | (45) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-𝑇 alteration and/or metamorphism | |
31 : Thermally altered carbonate, phosphate, and iron formations |
Type Occurrence of Tinaksite
General Appearance of Type Material:
Well-bounded prismatic crystals from tenths of a mm to several cm, often grouped in radiating fibrous aggregates and rosettes up to 3-5 cm in diameter.
Place of Conservation of Type Material:
n.d.
Geological Setting of Type Material:
K-feldspar metasomatites at the contact of the massif with limestones.
Associated Minerals at Type Locality:
Other Language Names for Tinaksite
Common Associates
Associated Minerals Based on Photo Data:
100 photos of Tinaksite associated with 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 |
73 photos of Tinaksite associated with Aegirine | NaFe3+Si2O6 |
7 photos of Tinaksite associated with Frankamenite | K3Na3Ca5(Si12O30)(F,OH)4 · H2O |
6 photos of Tinaksite associated with Fedorite | (Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2O |
5 photos of Tinaksite associated with Pectolite | NaCa2Si3O8(OH) |
3 photos of Tinaksite associated with Steacyite | K0.3(Na,Ca)2ThSi8O20 |
3 photos of Tinaksite associated with Quartz | SiO2 |
3 photos of Tinaksite associated with Canasite | K3Na3Ca5Si12O30(OH)4 |
2 photos of Tinaksite associated with Microcline | K(AlSi3O8) |
2 photos of Tinaksite associated with Magnesio-arfvedsonite | {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2 |
Related Minerals - Strunz-mindat Grouping
9.DG. | Calcinaksite | KNaCa(Si4O10) · H2O |
9.DG. | Barrydawsonite-(Y) | Na1.5Y0.5CaSi3O8(OH) |
9.DG. | Paratobermorite | Ca4(Al0.5Si0.5)2Si4O16(OH)(H2O)2 · (Ca · 3H2O) |
9.DG. | Alvesite | NaKZrSi6O15 · 2H2O |
9.DG.02 | Steedeite | NaMn2[Si3BO9](OH)2 |
9.DG.02 | Nolzeite | NaMn2[Si3BO9](OH)2 · 2H2O |
9.DG.05 | Bustamite | CaMn2+(Si2O6) |
9.DG.05 | Ferrobustamite | CaFe2+(Si2O6) |
9.DG.05 | Pectolite | NaCa2Si3O8(OH) |
9.DG.05 | Serandite | NaMn2+2Si3O8(OH) |
9.DG.05 | Wollastonite | Ca3(Si3O9) |
9.DG.05 | Wollastonite-1A | CaSiO3 |
9.DG.05 | Tanohataite | LiMn2Si3O8(OH) |
9.DG.05 | Schizolite | NaCaMnSi3O8(OH) |
9.DG.05 | Murakamiite | LiCa2Si3O8(OH) |
9.DG.05 | Dalnegorskite | Ca5Mn(Si3O9)2 |
9.DG.07 | Cascandite | CaScSi3O8(OH) |
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(H2O)2 · (Ca · 3H2O) |
9.DG.12 | Jusite | Na2Ca15Al4Si16O54 · 17H2O |
9.DG.12 | Kenotobermorite | Ca4Si6O15(OH)2(H2O)2 · 3H2O |
9.DG.15 | Foshagite | Ca4(Si3O9)(OH)2 |
9.DG.20 | Jennite | Ca9(Si3O9)2(OH)8 · 8H2O |
9.DG.20 | Kamenevite | K2TiSi3O9 · H2O |
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.32 | Escheite | Ca2NaMnTi5[Si12O34]O2(OH)3 · 12H2O |
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.65 | Patynite | NaKCa4[Si9O23] |
9.DG.67 | Whelanite | Cu2+2Ca6[Si6O17(OH)](CO3)(OH)3 · 2H2O |
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.70 | Yusupovite | Na2Zr(Si6O15) · 2.5H2O |
9.DG.70 | Enricofrancoite | KNaCaSi4O10 |
9.DG.75 | Tokkoite | K2Ca4[Si7O18(OH)](OH,F) |
9.DG.75 | Senkevichite | CsKNaCa2TiO[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 |
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.
Internet Links for Tinaksite
mindat.org URL:
https://www.mindat.org/min-3966.html
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References for Tinaksite
Localities for Tinaksite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Russia (TL) | |
| [Lapis 1993:4 p.13-20] +2 other references |
Kaneva +4 other references | |
Pavel.M. Kartashov (n.d.) +3 other references | |
- (n.d.) | |
Konev et al. (1996) +1 other reference | |
Vorob'yov E.I. (2008) | |
Vorob'yov E.I. (2008) | |
Pavel.M. Kartashov (n.d.) | |
| Vladykin et al. (2008) |
| Pavel.M. Kartashov (n.d.) |
| [Mandarino |
Saudi Arabia | |
| Faheha et al. (2012) |
Quick NavTopAbout TinaksiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence Other LanguagesCommon AssociatesStrunz-MindatOther InformationTinaksite in petrologyInternet Links References Localities Locality List
Murunskii Massif, Chara and Tokko Rivers Confluence, Aldan Shield, Russia