Loudounite Mineral Data (original) (raw)

General Loudounite Information

Help on Chemical Formula: Chemical Formula:

NaCa5Zr4Si16O40(OH)11•8(H2O)

Help on Composition: Composition:

Molecular Weight = 2,008.82 gm

Sodium 1.14 % Na 1.54 % Na2O

Calcium 9.98 % Ca 13.96 % CaO

Zirconium 18.16 % Zr 24.54 % ZrO2

Silicon 22.37 % Si 47.86 % SiO2

Hydrogen 1.35 % H 12.11 % H2O

Oxygen 46.99 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

NaCa5Zr4Si16O40(OH)11•8(H2O)

Help on Environment: Environment:

In a diabase.

Help on IMA Status: IMA Status:

Approved IMA 1983

Help on Locality: Locality:

Goose Creek Quarry, Loudoun Co., Virginia, USA. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for the locality.

Help on Name Pronunciation: Name Pronunciation:

Loudounite + Pronunciation Say LOUDOUNITE

Loudounite Image

Click Here for Larger Loudounite Image in a New Browser Window Images:

Click Here for Larger Loudounite Image Loudounite Comments: SEM image of several spherulitic aggregates of loudounite with acicular actinolite. AmMin, 21:37. Location: Goose Creek quarry, Loudoun County, Virginia, USA.Scale: Scale Bar 50 µm. © American Mineralogist

Loudounite Crystallography

Help on Crystal System: Crystal System:

Monoclinic

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.931(1), 4.06(0.7), 7.37(0.6),

Physical Properties of Loudounite

Help on Color: Color:

Colorless, Green, White, Light green.

Help on Density: Density:

2.48

Help on Diaphaneity: Diaphaneity:

Translucent

Help on Habit: Habit:

Fibrous - Crystals made up of fibers.

Help on Habit: Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Help on Habit: Habit:

Spherical - Spherical, rounded aggregates.

Help on Hardness: Hardness:

5 - Apatite

Help on Luminescence: Luminescence:

Non-fluorescent.

Help on Streak: Streak:

white

Optical Properties of Loudounite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.219,KC= 0.2247
Ncalc = 1.56

Help on Optical Data: Optical Data:

Biaxial (?), a=1.536, g=1.55, bire=0.0140

Help on Pleochroism (x): Pleochroism (x):

none.

Help on Pleochroism (y): Pleochroism (y):

none.

Help on Pleochroism (z): Pleochroism (z):

none.

Calculated Properties of Loudounite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.45 gm/cc
note: Specific Gravity of Loudounite =2.48 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Help on Photoelectric: Photoelectric:

PELoudounite = 25.75 barns/electron
U=PELoudounite x rElectron Density= 63.20 barns/cc.

Help on Radioactivity: Radioactivity:

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

Loudounite Classification

Help on Dana Class: Dana Class:

59.02.02.05 (59)Cyclosilicate Three-Membered Rings

(59.02)hydrated

(59.02.02)Catapleiite group

59.02.02.01 Catapleiite (Na,Ca,[])2ZrSi3O9•2(H2O) B2/b (pseudo-HEX) 2/m

59.02.02.02 Calciocatapleiite (Ca,[])ZrSi3O9•2(H2O) Pbnn 2/m 2/m 2/m

59.02.02.03 Gaidonnayite Na2ZrSi3O9•2(H2O) P 21nb mm2

59.02.02.04 Georgechaoite KNaZrSi3O9•2(H2O) P 21nb mm2

59.02.02.05 Loudounite NaCa5Zr4Si16O40(OH)11•8(H2O) Mono

59.02.02.06 Bobtraillite! (Na,Ca)13Sr11(Zr,Y,Nb)14Si42B6O132(OH)12•12H2O P 3c1 3 2/m

Help on Strunz Class: Strunz Class:

09.HF.10 09 - SILICATES (Germanates)

09.H - Unclassified Silicates

09.HF -With Nb, Ta, Zr

09.HF.10 Loudounite NaCa5Zr4Si16O40(OH)11•8(H2O) Mono

Other Loudounite Information

Help on References: References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Help on See Also: See Also:

Links to other databases for Loudounite :
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 Loudounite here :
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Print or Cut-and-Paste your Loudounite Specimen Label here :

Loudounite

NaCa5Zr4Si16O40(OH)11•8(H2O)
Dana No: 59.02.02.05 Strunz No: 09.HF.10
Locality:

Notes: