Tiettaite Mineral Data (original) (raw)

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

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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:

OrthorhombicSpace 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:

78.06.04.01 (78)Unclassified silicates

(78.06)possible tectosilicates

(78.06.04)Dana Group

78.06.04.01 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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Ask about Tiettaite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

Print or Cut-and-Paste your Tiettaite Specimen Label here :

Tiettaite

(Na,K)17Fe+++TiSi16O29(OH)30•2(H2O)
Dana No: 78.06.04.01 Strunz No: 09.HA.90
Locality:

Notes: