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Eveslogite Mineral Data

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General Eveslogite Information

Help on Chemical  Formula: Chemical Formula: (Ca,K,Na,Sr,Ba)48[(Ti,Nb,Fe,Mn)12(OH)12Si48O144](F,OH,Cl)14
Help on Composition: Composition: Molecular Weight = 6,800.28 gm
   Potassium   7.05 %  K     8.50 % K2O
   Rubidium    0.18 %  Rb    0.19 % Rb2O
   Barium      2.52 %  Ba    2.82 % BaO
   Sodium      3.48 %  Na    4.69 % Na2O
   Strontium   2.32 %  Sr    2.74 % SrO
   Calcium    13.24 %  Ca   18.52 % CaO
   Zirconium   0.25 %  Zr    0.34 % ZrO2
   Tantalum    0.21 %  Ta    0.26 % Ta2O5
   Titanium    3.89 %  Ti    6.50 % TiO2
   Manganese   0.77 %  Mn    1.10 % Mn2O3
   Niobium     4.56 %  Nb    6.53 % Nb2O5
   Aluminum    0.16 %  Al    0.31 % Al2O3
   Iron        0.85 %  Fe    0.88 % FeO /  0.23 % Fe2O3
   Silicon    19.54 %  Si   41.79 % SiO2
   Hydrogen    0.32 %  H     2.84 % H2O
   Chlorine    0.42 %  Cl    0.42 % Cl
                -   %   Cl   -0.09 % -O=Cl2   
   Oxygen     37.53 %  O
   Fluorine    2.71 %  F     2.71 % F
                -   %   F    -1.14 % -O=F2    
             ______        ______ 
             100.00 %      100.14 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca22.46K12.27Na10.3Sr1.8Ba1.25Ti5.53Nb3.34Mn3+0.95Fe2+0.83Fe3+0.2Zr0.19Rb0.14Ta0.08 (OH)12Si47.3Al0.41O138.08(OH)9.42Cl0.8
Help on Environment: Environment: Veins cutting nephneline syenite. (close to astrophyllite)
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Mt. Eveslogchorr, Khibiny alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality
Help on Synonym: Synonym: IMA2001-023
 

Eveslogite Image

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  Eveslogite

Comments: Yellowish brown crystal fragment of eveslogite.
Location: Yukspolark Pass, Khibiny Massif, Kola Peninsula, Russia. Scale: Specimen Size 10x7 mm.
© Sergey Vasiliev / Systematic Mineralogy

Eveslogite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5641:1:1.7768
Help on Cell Dimensions: Cell Dimensions: a = 14.069, b = 24.937, c = 44.31, Z = 4; beta = 95.02° V = 15,486.03 Den(Calc)= 2.92
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.853(1)(428), 3.127(0.65)(426), 2.99(0.59)(2.3.12),3.11(0.52)(364), 12.33(0.51)(020), 2.94(0.45)(24.1.2), 6.199(0.42)(040),
 

Physical Properties of Eveslogite

Help on Cleavage: Cleavage: {001} Perfect, {010} Perfect
Help on Color: Color: Light brown, Yellow brown.
Help on Density: Density: 2.85
Help on Diaphaneity: Diaphaneity: Semitransparent
Help on Fracture: Fracture: Brittle - Splintery - Brittle fracture leaving splintery fragments.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: white
 

Optical Properties of Eveslogite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2191,KPDmeas= 0.2244,KC= 0.2219
Ncalc = 1.63 - 1.65
Help on Optical Data: Optical Data: Biaxial (-), a=1.631, b=1.641, g=1.647, bire=0.0160
 

Calculated Properties of Eveslogite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.79 gm/cc
note: Specific Gravity of Eveslogite =2.85 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEEveslogite = 26.49 barns/electron
U=PEEveslogite x relectron= 73.90 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 172.67 (Gamma Ray American Petroleum Institute Units)
Concentration of Eveslogite per GRapi unit = 0.58 (%)

Estimated Radioactivity from Eveslogite - barely detectable

 

Eveslogite Classification

Help on  Dana Class: Dana Class: 56.02.06c.07 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.06c)Seidozerite - Lamprophyllite group (Lamprophyllite subgroup)
 
56.02.06c.01 Barytolamprophyllite Ba2Na3(Fe,Ti)3(Si2O7)2(O,OH,F)4 C 2/m 2/m
 
56.02.06c.02 Delindeite Ba2(Na,K,[])3(Ti,Fe)[Ti2(O,OH)4Si4O14](H2O,OH)2 A2/m 2/m
 
56.02.06c.03 Ericssonite BaMn2FeO[Si2O7](OH) C 2/m 2/m
 
56.02.06c.04 Lamprophyllite Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2 C 2/m 2/m
 
56.02.06c.05 Orthoericssonite BaMn2(FeO)Si2O7(OH) Pmmn 2/m 2/m 2/m
 
56.02.06c.06 Andremeyerite BaFe(Fe,Mn,Mg)Si2O7 P 21/c 2/m
 
56.02.06c.07 Eveslogite! (Ca,K,Na,Sr,Ba)48[(Ti,Nb,Fe,Mn)12(OH)12Si48O144](F,OH,Cl)14 P 2/m 2/m
 
56.02.06c.08 Nabalamprophyllite! Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2} P 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.DG.97 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DG -Inosilicates with 3-periodic single and multiple chains
 
09.DG.97 Eveslogite! (Ca,K,Na,Sr,Ba)48[(Ti,Nb,Fe,Mn)12(OH)12Si48O144](F,OH,Cl)14 P 2/m 2/m
 

Other Eveslogite Information

Help on References: References: NAME( AmMin, 89:249) PHYS. PROP.(AmMin, 89:249) OPTIC PROP.(AmMin, 89:249)
Help on See Also: See Also: Links to other databases for Eveslogite :
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 Eveslogite Specimen Label here :

Eveslogite

(Ca,K,Na,Sr,Ba)48[(Ti,Nb,Fe,Mn)12(OH)12Si48O144](F,OH,Cl)14
Dana No: 56.02.06c.07 Strunz No: 09.DG.97
Locality:

 

Notes:

 

 
   
 


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