Loudounite Mineral Data + Say LOUDOUNITE


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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: After the locality.
 

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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 Diaphaniety: Diaphaniety: 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
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:

relectron=2.45 gm/cc
note: rLoudounite =2.48 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.03118
Boson Index = 0.96882
Help on Photoelectric: Photoelectric:

PELoudounite = 25.75 barns/electron
U=PELoudounite x relectron= 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: 59.2.2.5 (59)Cyclosilicate Three-Membered Rings
  (59.2)hydrated
  (59.2.2)Catapleiite group
 
59.2.2.1 Catapleiite (Na,Ca,[])2ZrSi3O9·2(H2O) B2/b (pseudo-HEX) 2/m
 
59.2.2.2 Calcium-catapleiite (Ca,[])ZrSi3O9·2(H2O) Pbnn 2/m 2/m 2/m
 
59.2.2.3 Gaidonnayite Na2ZrSi3O9·2(H2O) P 21nb mm2
 
59.2.2.4 Georgechaoite KNaZrSi3O9·2(H2O) P 21nb mm2
 
59.2.2.5 Loudounite NaCa5Zr4Si16O40(OH)11·8(H2O) Mono
 
59.2.2.6 Bobtraillite! Na15Sr12Zr14Si42B6O138(OH)6·12(H2O) P 63cm 6mm
Help on  Strunz Class: Strunz Class: VIII/G.09-20 VIII - Silicates
  VIII/G - Intermediate between chain- and layered silicates
  VIII/G.09 - Lemoynite - Loudounite series
 
VIII/G.09-05 Altisite Na3K6Ti2Al2Si8O26Cl3 C 2/m 2/m
 
VIII/G.09-08 Natrolemoynite! Na4Zr2Si10O26·9(H2O) C 2/m 2/m
 
VIII/G.09-10 Lemoynite (Na,K)2CaZr2Si10O26·5-6(H2O) C 2/m 2/m
 
VIII/G.09-20 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Loudounite

NaCa5Zr4Si16O40(OH)11·8(H2O)
Dana No: 59.2.2.5 Strunz No: VIII/G.09-20
Locality:

 

Notes:

 

 
   
 
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