Tiettaite
A valid IMA mineral species
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About Tiettaite
Formula:
K4Na12Fe3+Si16O41(OH)4 · 2H2O
formerly given as Na17Fe3+TiSi16O29(OH)30 · 2H2O
Colour:
Colourless
Lustre:
Vitreous
Hardness:
3
Crystal System:
Orthorhombic
Name:
From Lappish "tietta", science or knowledge. Tietta is also the name for the first scientific station of the USSR Academy of Science in Khibiny.
This page provides mineralogical data about Tiettaite.
Unique Identifiers
Mindat ID:
3959
Long-form identifier:
mindat:1:1:3959:4
IMA Classification of Tiettaite
Approved
IMA status notes:
Redefined by the IMA
IMA Formula:
K4Na12Fe3+2Si16O41(OH)4·2H2O
Approval year:
1991
First published:
1993
Approval history:
Formula redefined due to the data from the Newsletter #60 (Miyawaki et al. 2021).
Classification of Tiettaite
9.HA.90
9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
78.6.4.1
78 : Unclassified Silicates
6 :
78 : Unclassified Silicates
6 :
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 for Standard |
|---|---|---|
| Tie | 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 Tiettaite
Vitreous
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Hardness:
3 on Mohs scale
Hardness Data:
Measured
Cleavage:
Perfect
{100} and {010} cleavages
{100} and {010} cleavages
Fracture:
Step-Like
Optical Data of Tiettaite
Type:
Biaxial (-)
RI values:
nα = 1.53 - 1.532 nβ = 1.548 - 1.549 nγ = 1.559
2V:
Measured: 79° , Calculated: 74°
Max. Birefringence:
δ = 0.027 - 0.029
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
r < v moderate
Chemistry of Tiettaite
Mindat Formula:
K4Na12Fe3+Si16O41(OH)4 · 2H2O
formerly given as Na17Fe3+TiSi16O29(OH)30 · 2H2O
formerly given as Na17Fe3+TiSi16O29(OH)30 · 2H2O
Element Weights:
Common Impurities:
Ca
Crystallography of Tiettaite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Cmcm
Cell Parameters:
a = 29.77(1) Å, b = 11.03(2) Å, c = 17.111(5) Å
Ratio:
a:b:c = 2.699 : 1 : 1.551
Unit Cell V:
5,618.62 ų (Calculated from Unit Cell)
Comment:
space group Cmc2, or C2mc
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.38 Å | (100) |
| 4.516 Å | (75) |
| 3.220 Å | (65) |
| 3.097 Å | (80) |
| 2.972 Å | (65) |
| 2.773 Å | (90) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Tiettaite
Co-Type Localities:
General Appearance of Type Material:
Rounded friable aggregates up to 1 cm, containing acicular hairs elongated on [001] and flattened (100).
Place of Conservation of Type Material:
Fersman Museum, Moscow, and the Kola Science Center, Apatity.
Geological Setting of Type Material:
Occurs in unweathered (subsurface) ultra-agpaitic pegmatites.
Associated Minerals at Type Locality:
Synonyms of Tiettaite
Other Language Names for Tiettaite
Common Associates
Associations Based on Photo Data:
| 1 photo of Tiettaite associated with Lomonosovite | Na5Ti2(Si2O7)(PO4)O2 |
Related Minerals - Strunz-mindat Grouping
| 9.HA. | Shinichengite | Ca5[BSi2O7(OH)2]2 · 6H2O |
| 9.HA. | Kalyuzhnyite-(Ce) | NaKCaSrCeTi(Si8O21)OF(H2O)3 |
| 9.HA. | Moragite | Ca3TiSi2(Al2Si)O14 |
| 9.HA.05 | Ertixiite | Na2Si4O9 |
| 9.HA.10 | Kenyaite | Na2Si22O41(OH)8 · 6H2O |
| 9.HA.20 | Wawayandaite | Ca6Mn2BBe9Si6O23(OH,Cl)15 |
| 9.HA.25 | Magbasite | KBaFe3+Mg7Si8O22(OH)2F6 |
| 9.HA.35 | Demagistrisite | BaCa2Mn3+4(Si3O10)(Si2O7)(OH)4 · 3H2O |
| 9.HA.37 | Donwilhelmsite | CaAl4Si2O11 |
| 9.HA.40 | Kasatkinite | Ba2Ca8B5Si8O32(OH)3 · 6H2O |
| 9.HA.40 | 'Igumnovite' | Ca3Al2[SiO4]2[◻Cl4] |
| 9.HA.42 | Paqueite | Ca3TiSi2(Al,Ti,Si)3O14 |
| 9.HA.42 | Qeltite | Ca3TiSi2(Fe3+2Si)O14 |
| 9.HA.45 | Rippite | K2(Nb,Ti)2(Si4O12)O(O,F) |
| 9.HA.47 | Zagamiite | CaAl2Si3.5O11 |
| 9.HA.50 | Rudenkoite | Sr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2O |
| 9.HA.50 | 'α-Carnegieite' | NaAlSiO4 |
| 9.HA.52 | 'Atheriastite' | near Ca5MgFeAl6Si8O32 · 5H2O |
| 9.HA.55 | 'Foshallasite' | Ca3[Si2O7] · 3H2O(?) |
| 9.HA.57 | 'Bhreckite' | |
| 9.HA.60 | Nagelschmidtite | Ca7(SiO4)2(PO4)2 |
| 9.HA.65 | Caryochroite | [Na(Sr0.5Ca0.5)Mg]3[Fe3+8Mn(Fe2+0.5◻0.5)]10(Ti2Si12O37)(OH)14(H2O)3 |
| 9.HA.70 | Juanite | Ca10Mg4Al2Si11O39 · 4H2O or near |
| 9.HA.75 | Tacharanite | Ca12Al2Si18O33(OH)36 |
| 9.HA.80 | Oyelite | Ca10Si8B2O29 · 12.5H2O |
| 9.HA.85 | Denisovite | K14+x(Ca,Na,Mn,Fe)48[Si60O162]F16(Ox,OH4-x) · 2H2O |
Radioactivity
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.
Internet Links for Tiettaite
mindat.org URL:
https://www.mindat.org/min-3959.html
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Please feel free to link to this page.
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References for Tiettaite
Localities for Tiettaite
Showing 2 localities.
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Russia (TL) | |
| Khomyakov et al. (1993) +2 other references |
| Khomyakov et al. (1993) +2 other references |
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Rasvumchorr Mt, Murmansk Oblast, Russia