Intersilite Mineral Data (original) (raw)

General Intersilite Information

Help on Chemical Formula: Chemical Formula:

Na6Mn++Ti[Si10O24(OH)](OH)3•4(H2O)

Help on Composition: Composition:

Molecular Weight = 1,045.69 gm

Sodium 13.19 % Na 17.78 % Na2O

Titanium 4.58 % Ti 7.64 % TiO2

Manganese 5.25 % Mn 6.78 % MnO

Silicon 26.86 % Si 57.46 % SiO2

Hydrogen 1.16 % H 10.34 % H2O

Oxygen 48.96 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Na6Mn2+TiSi10O24(OH)4•4(H2O)

Help on Environment: Environment:

In hyperagpaitic pegmatites.

Help on IMA Status: IMA Status:

Approved IMA 1994 (Dana # Added)

Help on Locality: Locality:

Mount Alluaiv in the northwestern part of the Lovozero alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named in allusion to it's intermediate position between the layered and banded silicates.

Help on Name Pronunciation: Name Pronunciation:

Intersilite + Pronunciation Say INTERSILITE

Help on Synonym: Synonym:

IMA1995-033

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Intersilite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.6963:1:0.6552

Help on Cell Dimensions: Cell Dimensions:

a = 13.033, b = 18.717, c = 12.264, Z = 4; beta = 99.62° V = 2,949.59 Den(Calc)= 2.35

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/m

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 10.56(1), 3.196(0.8), 6.38(0.5),

Click Here for Large Intersilite Structure Window Crystal Structure:

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| | Yamnova N A , Egorov-Tismenko Y K , Khomyakov A P , Crystallography Reports , 41 (1996) p.239-244, Crystal structure of a new natural (Na,Mn,Ti)-phyllosilicate, Locality: Aluaiv, Lovozero alkaline massif, Kola peninsula, Russia | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Intersilite

Help on Cleavage: Cleavage:

{100} Perfect

Help on Color: Color:

Yellow, Pinkish yellow, Pink.

Help on Density: Density:

2.42

Help on Diaphaneity: Diaphaneity:

Transparent to Translucent

Help on Fracture: Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Help on Habit: Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Help on Hardness: Hardness:

3-4 - Calcite-Fluorite

Help on Luster: Luster:

Vitreous - Greasy

Help on Streak: Streak:

white

Optical Properties of Intersilite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.029 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2318,KPDmeas= 0.2251,KC= 0.2318
Ncalc = 1.54 - 1.56

Help on Optical Data: Optical Data:

Biaxial (-), a=1.536, b=1.545, g=1.553, bire=0.0170, 2V(Calc)=86, 2V(Meas)=87. Dispersion r < v strong.

Calculated Properties of Intersilite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.34 gm/cc
note: Specific Gravity of Intersilite =2.35 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Help on Photoelectric: Photoelectric:

PEIntersilite = 3.31 barns/electron
U=PEIntersilite x rElectron Density= 7.74 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Intersilite is Not Radioactive

Intersilite Classification

Help on Dana Class: Dana Class:

74.03.08.01 (74)Phyllosilicate Modulated Layers

(74.03)with joined strips

(74.03.08)Dana Group

74.03.08.01 Intersilite! Na6MnTi[Si10O24(OH)](OH)3•4(H2O) I2/m 2/m

Help on Strunz Class: Strunz Class:

09.EE.60 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EE -Single tetrahedral nets of 6-membered rings

09.EE.60 Intersilite! Na6MnTi[Si10O24(OH)](OH)3•4(H2O) I2/m 2/m

Other Intersilite Information

Help on References: References:

NAME( MinRec, Vol 28, No. 3) PHYS. PROP.(Eur. J. Min.,Vol.8,1996) OPTIC PROP.(MinRec, Vol 28, No. 3)

Help on See Also: See Also:

Links to other databases for Intersilite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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

Intersilite

Na6Mn++Ti[Si10O24(OH)](OH)3•4(H2O)
Dana No: 74.03.08.01 Strunz No: 09.EE.60
Locality:

Notes: