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Loudounite Mineral Data

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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

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  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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Loudounite

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

 

Notes:

 

 
   
 


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