Mineralogy Database

Tiettaite Mineral Data

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General Tiettaite Information

Help on Chemical  Formula: Chemical Formula: (Na,K)17Fe+++TiSi16O29(OH)30•2(H2O)
Help on Composition: Composition: Molecular Weight = 2,066.91 gm
   Potassium  13.24 %  K    15.95 % K2O
   Sodium     11.12 %  Na   14.99 % Na2O
   Titanium    2.32 %  Ti    3.86 % TiO2
   Iron        2.70 %  Fe    3.86 % Fe2O3
   Silicon    21.74 %  Si   46.51 % SiO2
   Hydrogen    1.66 %  H    14.82 % H2O
   Oxygen     47.22 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na10K7Fe3+TiSi16O29(OH)30•2(H2O)
Help on Environment: Environment: Ultra-agpaitic pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1993
Help on Locality: Locality: Mt. Ruasvumchorr and Mt. Koashva, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Finnish "tietta", science or knowledge, for the first science station in Khibiny.
Help on Name Pronunciation: Name Pronunciation: Tiettaite + Pronunciation Say TIETTAITE
Help on Synonym: Synonym: IMA1991-013

Tiettaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.699:1:1.5513
Help on Cell Dimensions: Cell Dimensions: a = 29.77, b = 11.03, c = 17.111, Z = 4; V = 5,618.62 Den(Calc)= 2.44
Help on Crystal System: Crystal System: Orthorhombic Space Group: C mcm,C mc21,C 2mc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.38(1), 2.773(0.9), 3.097(0.8),

Physical Properties of Tiettaite

Help on Cleavage: Cleavage: {100} Perfect, {010} Perfect
Help on Color: Color: Colorless, Grayish white, Dark gray.
Help on Density: Density: 2.42
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Even - Flat surfaces (not cleavage) fractured in an even pattern.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: white

Optical Properties of Tiettaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.036 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.044 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2238,KPDmeas= 0.2257,KC= 0.2342
Ncalc = 1.57
Help on Optical Data: Optical Data: Biaxial (-), a=1.53-1.532, b=1.548-1.549, g=1.559, bire=0.0270-0.0290, 2V(Calc)=74, 2V(Meas)=79. Dispersion r < v moderate.
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
Help on Pleochroism (z): Pleochroism (z): none.

Calculated Properties of Tiettaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.43 gm/cc
note: Specific Gravity of Tiettaite =2.42 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PETiettaite = 3.51 barns/electron
U=PETiettaite x relectron= 8.51 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 191.70 (Gamma Ray American Petroleum Institute Units)
Concentration of Tiettaite per GRapi unit = 0.52 (%)

Estimated Radioactivity from Tiettaite - barely detectable


Tiettaite Classification

Help on  Dana Class: Dana Class: (78)Unclassified silicates
  (78.06)possible tectosilicates
  (78.06.04)Dana Group Tiettaite (Na,K)17FeTiSi16O29(OH)30•2(H2O) C mcm,C mc21,C 2mc Ortho
Help on  Strunz Class: Strunz Class: 09.HA.90 09 - SILICATES (Germanates)
  09.H - Unclassified Silicates
  09.HA -With alkali and alkali-earth Elements
09.HA.90 Tiettaite (Na,K)17FeTiSi16O29(OH)30•2(H2O) C mcm,C mc21,C 2mc Ortho

Other Tiettaite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Tiettaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 09.HA.90





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