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Tiettaite

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About TiettaiteHide

Formula:
(Na,K)17FeTiSi16O29(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.


Classification of TiettaiteHide

Approved
Approval Year:
1991
9.HA.90

9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
78.6.4.1

78 : Unclassified Silicates
6 :

Physical Properties of TiettaiteHide

Vitreous
Transparency:
Transparent
Colour:
Colourless
Hardness:
Hardness Data:
Measured
Cleavage:
Perfect
{100} and {010} cleavages
Fracture:
Step-Like

Optical Data of TiettaiteHide

Type:
Biaxial (-)
RI values:
nα = 1.530 - 1.532 nβ = 1.548 - 1.549 nγ = 1.559
2V:
Measured: 79° , Calculated: 74°
Max Birefringence:
δ = 0.029
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r < v moderate

Chemical Properties of TiettaiteHide

Formula:
(Na,K)17FeTiSi16O29(OH)30 · 2H2O
IMA Formula:
Na17Fe3+TiSi16O29(OH)30 · 2H2O
Common Impurities:
Ca

Crystallography of TiettaiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/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:
Cmc2, or C2mc

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.38 (100)
4.516 (75)
3.220 (65)
3.097 (80)
2.972 (65)
2.773 (90)

Type Occurrence of TiettaiteHide

General Appearance of Type Material:
rounded friable aggregates up to 1 cm, containing acicular hairs elongat [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 TiettaiteHide

Other Language Names for TiettaiteHide

German:Tiettait
Spanish:Tiettaita

Related Minerals - Nickel-Strunz GroupingHide

9.HA.05ErtixiiteNa2Si4O9
9.HA.10KenyaiteNa2Si22O41(OH)8 · 6H2OMon.
9.HA.20WawayandaiteCa6Mn2BBe9Si6O23(OH,Cl)15Mon.
9.HA.25MagbasiteKBaFe3+Mg7Si8O22(OH)2F6Orth. mmm (2/m 2/m 2/m) : Cmma
9.HA.30AfanasyevaiteCa8[Si2O7]OCl2
9.HA.40IgumnoviteCa3Al2(SiO4)2Cl4Iso.
9.HA.50RudenkoiteSr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2OMon.
9.HA.55FoshallasiteCa3[Si2O7] · 3H2O(?)
9.HA.60NagelschmidtiteCa7(SiO4)2(PO4)2Hex. 6 : P61
9.HA.65Caryochroite(Na,Sr)3(Fe3+,Mg)10[(O,OH)9|Ti2Si12O37] · (H2O,O,OH)17Mon.
9.HA.70JuaniteCa10Mg4Al2Si11O39 · 4H2O or near
9.HA.75TacharaniteCa12Al2Si18O33 (OH)36Mon.
9.HA.80OyeliteCa10Si8B2O29 · 12.5H2OOrth.
9.HA.85DenisoviteK14+x(Ca,Na,Mn,Fe)48[Si60O162]F16(Ox,OH4−x)·2H2OMon.

Other InformationHide

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 TiettaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1993), 122(1): 121-125.
Canadian Mineralogist (1998): 36: 1305-1310.
New Minerals (1997), New Minerals 1990-1994.

Internet Links for TiettaiteHide

Localities for TiettaiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- 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). 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • Northern Region
    • Murmanskaya Oblast'
      • Khibiny Massif
        • Koashva Mt
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
Mineral and/or Locality  
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