Eirikite Mineral Data (original) (raw)
General Eirikite Information
Chemical Formula:
KNa6Be2(Si15Al3)O39F2
Composition:
Molecular Weight = 1,359.26 gm
Potassium 2.88 % K 3.46 % K2O
Sodium 10.15 % Na 13.68 % Na2O
Beryllium 1.33 % Be 3.68 % BeO
Aluminum 5.96 % Al 11.25 % Al2O3
Silicon 30.99 % Si 66.31 % SiO2
Oxygen 45.91 % O
Fluorine 2.80 % F 2.80 % F
______ ______
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
Eirikite Image
Images:
 |
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
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 ScalenohedralH-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),
Optical Properties of Eirikite
Optical Data:
NCalc= 2.06 - from Gladstone-Dale relationship (KC = 0.2041) where Ncalc=Dcalc*KC+1
Calculated Properties of Eirikite
Electron Density:
Bulk Density (Electron Density)=5.11 gm/cc
note: Specific Gravity of Eirikite =5.17 gm/cc.
Fermion Index:
Fermion Index = 0.02
Boson Index = 0.98
Photoelectric:
PEEirikite = 1.84 barns/electron
U=PEEirikite x relectron= 9.41 barns/cc.
Radioactivity:
GRapi = 41.06 (Gamma Ray American Petroleum Institute Units)
Concentration of Eirikite per GRapi unit = 2.44 (%)
Estimated Radioactivity from Eirikite 
- barely detectable
Eirikite Classification
Dana Class:
78.07.10.03 (78)Unclassified silicates
(78.07)wholly unclassified silicates
(78.07.10)Dana Group
78.07.10.01 Leifite Na2(Si,Al,Be)7(O,OH,F)14 P 3m1 3 2/m
78.07.10.02 Telyushenkoite! CsNa6[Be2(Si,Al)18O39F2] P 3m1 3 2/m
78.07.10.03 Eirikite! KNa6Be2(Si15Al3)O39F2 P 3m1 3 2/m
Strunz Class:
09.EH.25 09 - SILICATES (Germanates)
09.E - Phyllosilicates
09.EH -Transitional structures between phyllosilicate and other silicate units
09.EH.25 Leifite Na2(Si,Al,Be)7(O,OH,F)14 P 3m1 3 2/m
09.EH.25 Telyushenkoite! CsNa6[Be2(Si,Al)18O39F2] P 3m1 3 2/m
09.EH.25 Eirikite! KNa6Be2(Si15Al3)O39F2 P 3m1 3 2/m
Other Eirikite Information
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 :
Eirikite
KNa6Be2(Si15Al3)O39F2
Dana No: 78.07.10.03 Strunz No: 09.EH.25
Locality:
Notes: