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Emeleusite Mineral Data

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General Emeleusite Information

Help on Chemical  Formula: Chemical Formula: Na4Li2Fe+++2Si12O30
Help on Composition: Composition: Molecular Weight = 1,034.54 gm
   Sodium    8.89 %  Na   11.98 % Na2O
   Lithium   1.34 %  Li    2.89 % Li2O
   Iron     10.80 %  Fe   15.44 % Fe2O3
   Silicon  32.58 %  Si   69.69 % SiO2
   Oxygen   46.40 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na4Li2Fe3+2Si12O30
Help on Environment: Environment: A minor constituent of a peralkalic trachyte dike, inflow-banded aegirine-albite-rich layers.
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: On the Island of Igdlutalik, Julianehab district, Greenland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Charles Henry Emeleus, University of Durham, Durham, England.
Help on Name Pronunciation: Name Pronunciation: Emeleusite + Pronunciation Say EMELEUSITE
Help on Synonym: Synonym: ICSD 34950
  PDF 29-832

Emeleusite Image

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Comments: Clear to pale tan glassy crystalline emeleusite with white albite and dark green aegirine.
Location: Igdlutalik, Greenland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Emeleusite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5805:1:0.8074
Help on Cell Dimensions: Cell Dimensions: a = 10.073, b = 17.35, c = 14.01, Z = 4; V = 2,448.48 Den(Calc)= 2.81
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnna
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.352(1), 3.209(0.8), 3.501(0.7),

Physical Properties of Emeleusite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, Pink white.
Help on Density: Density: 2.76
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Emeleusite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.04 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.057 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2123,KPDmeas= 0.2162,KC= 0.2252
Ncalc = 1.62 - 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.596, b=1.597, g=1.597, bire=0.0010, 2V(Calc)=0, 2V(Meas)=0-5.

Calculated Properties of Emeleusite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.72 gm/cc
note: Specific Gravity of Emeleusite =2.76 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEEmeleusite = 4.60 barns/electron
U=PEEmeleusite x rElectron Density= 12.51 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Emeleusite is Not Radioactive

Emeleusite Classification

Help on  Dana Class: Dana Class: (66)Inosilicate Double-Width Unbranched Chains, W=2
  (66.03)with chains P>2
  (66.03.04)P=6 (Tahualite group) Tuhualite [](Na,K)FeFe[Si6O15] C mca 2/m 2/m 2/m Zektzerite NaLiZrSi6O15 C mca 2/m 2/m 2/m Emeleusite Na4Li2Fe2Si12O30 Pnna 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.DN.05 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DN -Inosilicates with 6-periodic double chains
09.DN.05 Emeleusite Na4Li2Fe2Si12O30 Pnna 2/m 2/m 2/m
09.DN.05 Tuhualite [](Na,K)FeFe[Si6O15] C mca 2/m 2/m 2/m
09.DN.05 Zektzerite NaLiZrSi6O15 C mca 2/m 2/m 2/m

Other Emeleusite Information

Help on References: References: NAME( AntBidBlaNic2) 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 Emeleusite :
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: Strunz No: 09.DN.05





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