Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Emeleusite

Big Photo

Illutalik (Igdlutalik) Island, Ilimaussaq complex, Narsaq, Kitaa (West Greenland) Province, Greenland
© Knut Eldjarn

Show Emeleusite Photos (4)
Formula:
Li
 
2
Na
 
4
Fe
 
2
Si
 
12
O
 
30
System:OrthorhombicHardness:5 - 6
This page provides mineralogical data about Emeleusite.

Classification of Emeleusite

IMA status:Approved
Strunz 8th edition ID:8/E.22-100
Nickel-Strunz 10th (pending) edition ID:9.DN.05

9 : SILICATES (Germanates)
D : Inosilicates
N : Inosilicates with 6-periodic double chains
Dana 8th edition ID:66.3.4.3

66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
3 : Amphiboles - Ca-Na subgroup
Hey's CIM Ref.:14.20.1

14 : Silicates not Containing Aluminum
20 : Silicates of Fe and alkali metals
mindat.org URL:http://www.mindat.org/min-1374.html
Please feel free to link to this page.

Type Occurrence of Emeleusite

Type Locality:Illutalik (Igdlutalik) Island, Ilimaussaq complex, Narsaq, Kitaa (West Greenland) Province, Greenland
Year of Discovery:1978

Physical Properties of Emeleusite

Hardness (Mohs):5 - 6

Crystallography of Emeleusite

Crystal System:Orthorhombic
Cell Parameters:a = 10.07Å, b = 17.35Å, c = 14.01Å
Ratio:a:b:c = 0.58 : 1 : 0.807
Unit Cell Volume:V 2,447.75 ų (Calculated from Unit Cell)

Optical Data of Emeleusite

Type:Biaxial (-)
RI values: nα = 1.596 nβ = 1.597 nγ = 1.597
Maximum Birefringence:δ = 0.001

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

Chemical Properties of Emeleusite

Formula:
Li
 
2
Na
 
4
Fe
 
2
Si
 
12
O
 
30
Essential elements:Fe, Li, Na, O, Si
All elements listed in formula:Fe, Li, Na, O, Si
Common Impurities:Ti,Zr,Al,Mn,Mg,Ca,K

Relationship of Emeleusite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DN.05Tuhualite
(Na,K)
 
2
Fe
 
2
Fe
 
2
Si
 
12
O
 
30
·H
 
2
O
9.DN.05Zektzerite
LiNa(Zr,Ti,Hf)Si
 
6
O
 
15
9.DN.10Semenovite-(Ce)
Na
 
8
Ca
 
2
FeBe
 
6
Ce
 
2
Si
 
14
O
 
40
(OH)
 
4
F
 
4
9.DN.15Ashcroftine-(Y)
K
 
5
Na
 
5
(Y,Ca)
 
12
Si
 
28
O
 
70
(OH)
 
2
(CO
 
3
)
 
8
·8H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
14.20.2Aegirine
NaFe
3+
 
[Si
 
2
O
 
6
]
14.20.4Wilkinsonite
Na
 
2
Fe
2+
4
Fe
3+
2
[O
 
2
|Si
 
6
O
 
18
]
14.20.5Tuperssuatsiaite
Na
 
2
Fe
 
3
Si
 
8
O
 
20
(OH)
 
2
·4H
 
2
O
14.20.6Riebeckite
[ ][Na
 
2
][Fe
2+
3
Fe
3+
2
][(OH)
 
2
|Si
 
8
O
 
22
]
14.20.7 Ferri-annite
14.20.8Fenaksite
(K,Na)
 
4
(Fe,Mn)
 
2
(Si
 
4
O
 
10
)
 
2
(OH,F)
14.20.9Montdorite
(K,Na)
 
2
(Fe
2+
 
,Mn
2+
 
,Mg)
 
5
[(OH,F)
 
2
|Si
 
4
O
 
10
]
 
2

Other Names for Emeleusite

Synonyms:
IMA1977-021
Other Languages:
German:Emeleusit
Russian:Эмелеусит
Spanish:Emeleusita

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 Emeleusite

Reference List:American Mineralogist: 64: 242.

Mineralogical Magazine: 42: 31-34.

Zeitschrift für Kristallographie: 147: 297-306.

Internet Links for Emeleusite

Search Engines:
  • Look for Emeleusite on Google
  • Look for Emeleusite images on Google
    • External Links:
  • Look for Emeleusite on Webmineral
  • Look for Emeleusite on Athena Mineralogy
  • Look for Emeleusite on Wikipedia
  • Look for Emeleusite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Emeleusite in the Natural History Museum (London) online catalogue
  • Emeleusite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Fine Minerals from Dan Weinrich Minerals
  • Rare and Unusual minerals at Mineralogical Research Company
  • SpiriferMinerals.com - high quality specimens
  • Edwards Minerals - Fine Specimens
  • The Arkenstone - Fine Minerals
  • Buy Minerals and Crystals from Crystalarium.com
  • Buy Fine Minerals from mineralsweb.com
  • Buy fine minerals and gemstones from Pala International
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Buy minerals from Mineralium.com
  • Wilensky Fine Minerals
  • High-end worldwide specimens & outstanding customer service
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Emeleusite

    (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.
    Greenland
     
    • Kitaa (West Greenland) Province
      • Narsaq
        • Ilimaussaq complex
    		Min. Mag. 42 (1979), 31-34; Petersen, O. V. and Secher, K. (1993): The minerals of Greenland (Ilimaussaq), The Mineralogical Record, Vol. 24(2), 1-65
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    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: 7th Nov 2009 11:47:00