Loughlinite Mineral Data

Loughlinite Mineral Data +

[Current Minerals] [Order Status] [Policies] [e-Bay Items]
B & L Minerals, Fine Mineral specimens for sale for collectors of all levels

General Loughlinite Information

Chemical Formula:

Na2Mg3Si6O16·8(H2O)

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

Empirical Formula:

Na₂Mg₃Si₆O₁₆·8(H₂O)

Environment:

In dolomitic oil-shale.

IMA Status:

Approved IMA 1960

Locality:

Green River, Sweetwater Coundy, Wyoming, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Gerald Francis Loughlin (1880-1946), chief geologist, U. S. Geological Survey.

Loughlinite Image

Images:

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

Crystal System:

OrthorhombicSpace Group: Unk

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 12.9(1), 4.34(0.18), 4.51(0.07),

Physical Properties of Loughlinite

Color:

Pearl white.

Density:

2.165

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Luster:

Silky

Streak:

white

Optical Properties of Loughlinite

Gladstone-Dale:

CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2356,KC= 0.2326

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

Electron Density:

r_electron=2.20 gm/cc
note: r_Loughlinite=2.17 gm/cc.

Fermion Index

Fermion Index = 0.02232
Boson Index = 0.97768

Photoelectric:

PE_Loughlinite= 1.33 barns/electron
U=PE_Loughlinite x r_electron= 2.94 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Loughlinite is Not Radioactive

Loughlinite Classification

Dana Class:

74.3.1b.3 (74)Phyllosilicate Modulated Layers

(74.3)with joined strips

(74.3.1b)Palygorskite-sepiolite group (Sepiolite subgroup)

74.3.1b.1 Sepiolite Mg4Si6O15(OH)2·6(H2O) Pnan 2/m 2/m 2/m

74.3.1b.2 Falcondoite (Ni,Mg)4Si6O15(OH)2·6(H2O) Pncn 2/m 2/m 2/m

74.3.1b.3 Loughlinite Na2Mg3Si6O16·8(H2O) Unk Ortho

Strunz Class:

VIII/H.33-60 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica minerals with other simple layers, [Si6O15]6- and others

VIII/H.33 - Tuperssuatsiaite - Loughlinite series

VIII/H.33-10 Tuperssuatsiaite Na(Fe,Mn)3[Si8O20](OH)2·n(H2O) C 2/m Mono

VIII/H.33-20 Palygorskite (Mg,Al)2Si4O10(OH)·4(H2O) C 2/m 2/m

VIII/H.33-30 Yofortierite (Mn,Mg)5Si8O20(OH)2·8-9(H2O) Pn(?) m

VIII/H.33-40 Sepiolite Mg4Si6O15(OH)2·6(H2O) Pnan 2/m 2/m 2/m

VIII/H.33-50 Falcondoite (Ni,Mg)4Si6O15(OH)2·6(H2O) Pncn 2/m 2/m 2/m

VIII/H.33-60 Loughlinite Na2Mg3Si6O16·8(H2O) Unk Ortho

VIII/H.33-80 Intersilite! Na6MnTi[Si10O24(OH)](OH)3·4(H2O) I2/m 2/m

VIII/H.33-90 Kalifersite! (K,Na)5Fe7Si20O50(OH)6·12(H2O) P1 1

Other Loughlinite Information

References:

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

Search for Loughlinite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Loughlinite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Loughlinite Mineral Data :

Ask about Loughlinite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Loughlinite

Na2Mg3Si6O16·8(H2O)
Dana No: 74.3.1b.3 Strunz No: VIII/H.33-60
Locality:

Notes: