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Loughlinite Mineral Data

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General Loughlinite Information

Help on Chemical  Formula: Chemical Formula: Na2Mg3Si6O16•8(H2O)
Help on Composition: Composition: Molecular Weight = 687.52 gm
   Sodium      6.69 %  Na    9.01 % Na2O
   Magnesium  10.61 %  Mg   17.59 % MgO
   Silicon    24.51 %  Si   52.44 % SiO2
   Hydrogen    2.35 %  H    20.96 % H2O
   Oxygen     55.85 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Mg3Si6O16•8(H2O)
Help on Environment: Environment: In dolomitic oil-shale.
Help on IMA Status: IMA Status: Approved IMA 1960
Help on Locality: Locality: Green River, Sweetwater Coundy, Wyoming, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Gerald Francis Loughlin (1880-1946), chief geologist, U. S. Geological Survey.
Help on Name Pronunciation: Name Pronunciation: Loughlinite + Pronunciation Say LOUGHLINITE

Loughlinite Image

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  Loughlinite   Bradleyite

Comments: Silky fibrous veinlets of loughlinite with bradleyite.
Location: Green River area, Sweetwater County, Wyoming, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Loughlinite Crystallography

Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 12.9(1), 4.34(0.18), 4.51(0.07),

Physical Properties of Loughlinite

Help on Color: Color: Pearl white.
Help on Density: Density: 2.165
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
Help on Luster: Luster: Silky
Help on Streak: Streak: white

Optical Properties of Loughlinite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2356,KC= 0.2326
Ncalc = 1.5
Help on Optical Data: Optical Data: Biaxial (+), a=1.5, b=1.505, g=1.525, bire=0.0250, 2V(Calc)=54, 2V(Meas)=60.

Calculated Properties of Loughlinite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.20 gm/cc
note: Specific Gravity of Loughlinite =2.17 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PELoughlinite = 1.33 barns/electron
U=PELoughlinite x rElectron Density= 2.94 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Loughlinite is Not Radioactive

Loughlinite Classification

Help on  Dana Class: Dana Class: 74.03.01b.03 (74)Phyllosilicate Modulated Layers
  (74.03)with joined strips
  (74.03.01b)Palygorskite-sepiolite group (Sepiolite subgroup)
74.03.01b.01 Sepiolite Mg4Si6O15(OH)2•6(H2O) Pnan 2/m 2/m 2/m
74.03.01b.02 Falcondoite (Ni,Mg)4Si6O15(OH)2•6(H2O) Pncn 2/m 2/m 2/m
74.03.01b.03 Loughlinite Na2Mg3Si6O16•8(H2O) Unk Ortho
Help on  Strunz Class: Strunz Class: 09.EE.25 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EE -Single tetrahedral nets of 6-membered rings
09.EE.25 Falcondoite (Ni,Mg)4Si6O15(OH)2•6(H2O) Pncn 2/m 2/m 2/m
09.EE.25 Loughlinite Na2Mg3Si6O16•8(H2O) Unk Ortho
09.EE.25 Kalifersite! (K,Na)5Fe7Si20O50(OH)6•12(H2O) P1 1
09.EE.25 Sepiolite Mg4Si6O15(OH)2•6(H2O) Pnan 2/m 2/m 2/m

Other Loughlinite 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 Loughlinite :
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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Dana No: 74.03.01b.03 Strunz No: 09.EE.25





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