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Eirikite Mineral Data
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General Eirikite Information
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 Chemical Formula: |
KNa6Be2(Si15Al3)O39F2 |
| Composition: |
Molecular Weight = 1,359.26 gm |
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Potassium 2.88 % K 3.46 % K2O |
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Sodium 10.15 % Na 13.68 % Na2O |
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Beryllium 1.33 % Be 3.68 % BeO |
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Aluminum 5.96 % Al 11.25 % Al2O3 |
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Silicon 30.99 % Si 66.31 % SiO2 |
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Oxygen 45.91 % O |
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Fluorine 2.80 % F 2.80 % F |
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- %
F -1.18 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
KNa6Be2Si15Al3O39F2 |
| Environment: |
Leifite group |
| IMA Status: |
Proposed IMA 2007 (Dana # Added) |
| Locality: |
Vesle Ar�y island, Langesundsfjord district, Larvik community, Vestfold county, Norway Link to MinDat.org Location Data. |
| Name Origin: |
Commission on New Minerals, Nomenclature and Classification (CNMNC) |
| Synonym: |
IMA2007-017 |
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Eirikite Image |
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Images:
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Eirikite
Comments: Radial aggregates of silky white eirikite crystals in matrix.
Location: Mt. Eveslogchorr, Chibiny, Kola, Russia.
Scale: Not Given.
© Diederik Visser |
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Eirikite Crystallography
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| Axial Ratios: |
a:c = 1:0.33874 |
| Cell Dimensions: |
a = 14.3865, c = 4.8733, Z = 2; beta = 110.445° V = 873.50 Den(Calc)= 5.17 |
| Crystal System: |
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: P 3m1 |
| X Ray Diffraction: |
By Intensity(I/Io): 3.161(1), 3.386(0.7), 2.466(0.31),4.71(0.29), 4.153(0.21), 2.217(0.2), 2.398(0.19), 3.115(0.17), |
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Optical Properties of Eirikite
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| Optical Data: |
NCalc= 2.06 - from Gladstone-Dale relationship (KC = 0.2041) where Ncalc=Dcalc*KC+1
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Calculated Properties of Eirikite
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| Electron Density: |
Bulk Density (Electron Density)=5.11 gm/cc
note: Specific Gravity of Eirikite =5.17 gm/cc.
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| Fermion Index: |
Fermion Index = 0.02
Boson Index = 0.98 |
| Photoelectric: |
PEEirikite = 1.84 barns/electron
U=PEEirikite x relectron= 9.41 barns/cc.
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| Radioactivity: |
GRapi = 41.06 (Gamma Ray American Petroleum Institute Units)
Concentration of Eirikite per GRapi unit = 2.44 (%)
Estimated Radioactivity from Eirikite  - barely detectable
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Eirikite Classification
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| Dana Class: |
78.07.10.03 (78)Unclassified silicates |
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(78.07)wholly unclassified silicates |
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(78.07.10)Dana Group |
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78.07.10.01 Leifite Na2(Si,Al,Be)7(O,OH,F)14 P 3m1 3 2/m |
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78.07.10.02 Telyushenkoite! CsNa6[Be2(Si,Al)18O39F2] P 3m1 3 2/m |
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78.07.10.03 Eirikite! KNa6Be2(Si15Al3)O39F2 P 3m1 3 2/m |
| Strunz Class: |
09.EH.25 09 - SILICATES (Germanates) |
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09.E - Phyllosilicates |
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09.EH -Transitional structures between phyllosilicate and other silicate units |
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09.EH.25 Leifite Na2(Si,Al,Be)7(O,OH,F)14 P 3m1 3 2/m |
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09.EH.25 Telyushenkoite! CsNa6[Be2(Si,Al)18O39F2] P 3m1 3 2/m |
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09.EH.25 Eirikite! KNa6Be2(Si15Al3)O39F2 P 3m1 3 2/m |
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Other Eirikite Information
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| See Also: |
Links to other databases for Eirikite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Print or Cut-and-Paste your Eirikite Specimen Label here :
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Eirikite
KNa6Be2(Si15Al3)O39F2
Dana No: 78.07.10.03 Strunz No: 09.EH.25
Locality:
Notes:
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