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Loughlinite

Big Photo

Green River Formation, Sweetwater Co., Wyoming, USA
© luigi chiappino

Show Loughlinite Photos (4)
Formula:
Na
 
2
Mg
 
3
Si
 
6
O
 
16
·8H
 
2
O
System:Orthorhombic
This page provides mineralogical data about Loughlinite.

Classification of Loughlinite

IMA status:Approved
Strunz 8th edition ID:8/H.33-60
Nickel-Strunz 10th (pending) edition ID:9.EE.25

9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
Dana 8th edition ID:74.3.1b.3

74 : PHYLLOSILICATES Modulated Layers
3 : Modulated Layers with joined strips
Hey's CIM Ref.:14.4.12

14 : Silicates not Containing Aluminum
4 : Silicates of Mg
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Type Occurrence of Loughlinite

Type Locality:Westvaco mine, Green River formation, Sweetwater Co., Wyoming, USA
Year of Discovery:1960

Crystallography of Loughlinite

Crystal System:Orthorhombic
Cell Parameters:a = 14.66Å, b = 26.71Å, c = 5.26Å
Ratio:a:b:c = 0.549 : 1 : 0.197
Unit Cell Volume:V 2,059.65 ų (Calculated from Unit Cell)

Optical Data of Loughlinite

Type:Biaxial (+)
RI values: nα = 1.500 nβ = 1.505 nγ = 1.525
2V:Measured: 60° , Calculated: 54°
Maximum Birefringence:δ = 0.025

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:relatively weak

Chemical Properties of Loughlinite

Formula:
Na
 
2
Mg
 
3
Si
 
6
O
 
16
·8H
 
2
O
Essential elements:H, Mg, Na, O, Si
All elements listed in formula:H, Mg, Na, O, Si
Common Impurities:Ti,Al,Fe

Relationship of Loughlinite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EE.05Bementite
Mn
 
5
Si
 
4
O
 
10
(OH)
 
6
9.EE.10Brokenhillite
Mn
 
8
Si
 
6
O
 
15
(OH)
 
10
9.EE.10Pyrosmalite-(Fe)
(Fe,Mn)
 
8
Si
 
6
O
 
15
(OH,Cl)
 
10
9.EE.10Friedelite
(Mn,Fe)
 
8
Si
 
6
O
 
15
(OH,Cl)
 
10
9.EE.10Pyrosmalite-(Mn)
(Mn,Fe)
 
8
Si
 
6
O
 
15
(OH,Cl)
 
10
9.EE.10Mcgillite
(Mn,Fe)
 
8
Si
 
6
O
 
15
(OH)
 
8
Cl
 
2
9.EE.15Nelenite
(Mn,Fe)
 
16
(Si
 
12
O
 
30
)(OH)
 
14
[As
3+
3
O
 
6
(OH)
 
3
]
9.EE.15Schallerite
(Mn,Fe)
 
16
Si
 
12
As
 
3
O
 
36
(OH)
 
17
9.EE.20Palygorskite
(Mg,Al)
 
5
(Si,Al)
 
8
O
 
20
(OH)
 
2
·8H
 
2
O
9.EE.20Tuperssuatsiaite
Na
 
2
Fe
 
3
Si
 
8
O
 
20
(OH)
 
2
·4H
 
2
O
9.EE.20Yofortierite
Mn
 
5
Si
 
8
O
 
20
(OH)
 
2
·8-9H
 
2
O
9.EE.25Falcondoite
(Ni,Mg)
 
4
Si
 
6
O
 
15
(OH)
 
2
·6H
 
2
O
9.EE.25Sepiolite
Mg
 
4
Si
 
6
O
 
15
(OH)
 
2
·6H
 
2
O
9.EE.25Kalifersite
(K,Na)
 
5
Fe
3+
7
Si
 
20
O
 
50
(OH)
 
6
·12H
 
2
O
9.EE.30Gyrolite
Ca
 
4
(Si
 
6
O
 
15
)(OH)
 
2
·3H
 
2
O
9.EE.30Orlymanite
Ca
 
4
Mn
 
3
Si
 
8
O
 
20
(OH)
 
6
·2H
 
2
O
9.EE.30Tungusite
Ca
 
4
Fe
 
2
Si
 
6
O
 
15
(OH)
 
6
9.EE.35Reyerite
(Na,K)
 
2
Ca
 
14
(Si,Al)
 
24
O
 
58
(OH)
 
8
·6H
 
2
O
9.EE.35Truscottite
(Ca,Mn)
 
14
Si
 
24
O
 
58
(OH)
 
8
·2H
 
2
O
9.EE.40Natrosilite
Na
 
2
Si
 
2
O
 
5
9.EE.45Makatite
Na
 
2
Si
 
4
O
 
8
(OH)
 
2
·4H
 
2
O
9.EE.50Varennesite
Na
 
8
Mn
 
2
Si
 
10
O
 
25
(OH,Cl)
 
2
·12H
 
2
O
9.EE.55Raite
Na
 
4
Mn
2+
3
Ti
 
0.25
Si
 
8
O
 
20
(OH)
 
2
·10H
 
2
O
9.EE.60Intersilite
Na
 
6
Mn
2+
 
Ti[Si
 
10
O
 
24
(OH)](OH)
 
3
·4H
 
2
O
9.EE.65Shafranovskite
(Na,K)
 
6
(Mn,Fe)
 
3
Si
 
9
O
 
24
·6H
 
2
O
9.EE.65Zakharovite
Na
 
4
Mn
 
5
Si
 
10
O
 
24
(OH)
 
6
·6H
 
2
O
9.EE.70Zeophyllite
Ca
 
4
Si
 
3
O
 
8
(OH,F)
 
4
·2H
 
2
O
9.EE.75Minehillite
(K,Na)
 
2-3
Ca
 
28
Zn
 
4
Al
 
4
Si
 
40
O
 
112
(OH)
 
16
9.EE.80Fedorite
(Na,K)
 
2-3
(Ca
 
4
Na
 
3
)Si
 
16
O
 
38
F
 
2
 · 3.5H
 
2
O
9.EE.80Martinite
(Na,Ca)
 
11
Ca
 
4
(Si,S,B)
 
14
B
 
2
O
 
40
F
 
2
·4H
 
2
O
9.EE.85Lalondeite
(Na,Ca)
 
6
(Ca,Na)
 
3
Si
 
16
O
 
38
(F,OH)
 
2
·3H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
14.4.1Forsterite
Mg
 
2
[SiO
 
4
]
14.4.2Enstatite
Mg
 
2
[SiO
 
3
]
 
2
14.4.3Clinoenstatite
Mg
 
2
[Si
 
2
O
 
6
]
14.4.4Chrysotile
Mg
 
3
Si
 
2
O
 
5
(OH)
 
4
14.4.5Clinochrysotile
14.4.6Orthochrysotile
14.4.7Parachrysotile
14.4.8Lizardite
Mg
 
3
[(OH)
 
4
|Si
 
2
O
 
5
]
14.4.9Talc
Mg
 
3
Si
 
4
O
 
10
(OH)
 
2
14.4.10Spadaite
MgSiO
 
2
(OH)
 
2
·H
 
2
O
14.4.11Sepiolite
Mg
 
4
Si
 
6
O
 
15
(OH)
 
2
·6H
 
2
O
14.4.13Eifelite
KNa
 
3
Mg
 
4
Si
 
12
O
 
30
14.4.14Stevensite
(Ca,Na)
 
x
Mg
 
3
Si
 
4
O
 
10
(OH)
 
2
14.4.15Antigorite
(Mg,Fe
2+
 
)
 
3
[(OH)
 
4
|Si
 
2
O
 
5
]
14.4.16 Magnesio-anthophyllite

Other Names for Loughlinite

Other Languages:
German:Loughlinit
Spanish:Loughlinita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Loughlinite

Reference List:American Mineralogist (1960): 45: 270-281.

Internet Links for Loughlinite

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  • Raman and XRD data at RRUFF project
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    Localities for Loughlinite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Turkey
     
    • Central Anatolia Region
      • Eskisehir Province
        • Mihaliççik
    		Echle, W. (1967): Contributions to Mineralogy and Petrology 14, 86-101.
    USA
     
    • Utah
      • Duchesne Co.
    		UGMS Bull 117 Minerals and Mineral Localities of Utah
      • Uintah Co.
    		Min Rec 8:5 p369
    • Wyoming
      • Sweetwater Co.
        • Green River Formation
    		Am Min 45:270-281
    Am Min 45:270-281
    Am Min 46:420-429
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 19th Nov 2009 21:03:01