Ikranite Mineral Data


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General Ikranite Information
Help on Chemical Formula: Chemical Formula: (Na,H3O)15(Ca,Mn,REE)6Fe+++2Zr3([ ],Zr)([ ],Si)Si24O66(O,OH)6Cl·2-3H2O
Help on Composition: Composition: Molecular Weight = 2,760.39 gm
   Potassium   0.37 %  K     0.44 % K2O
   Sodium      5.93 %  Na    7.99 % Na2O
   Strontium   1.36 %  Sr    1.61 % SrO
   Calcium     4.52 %  Ca    6.32 % CaO
   Lanthanum   0.55 %  La    0.65 % La2O3
   Cerium      1.32 %  Ce    1.55 % Ce2O3
   Hafnium     0.26 %  Hf    0.31 % HfO2
   Zirconium  10.38 %  Zr   14.02 % ZrO2
   Titanium    0.23 %  Ti    0.38 % TiO2
   Manganese   2.65 %  Mn    3.42 % MnO
   Niobium     0.20 %  Nb    0.29 % Nb2O5
   Iron        3.68 %  Fe    0.39 % FeO /  4.83 % Fe2O3
   Silicon    22.97 %  Si   49.15 % SiO2
   Hydrogen    0.87 %  H     7.74 % H2O
   Neodymium   0.16 %  Nd    0.18 % Nd2O3
   Chlorine    0.90 %  Cl    0.90 % Cl
                -   %  Cl   -0.20 % -O=Cl2
   Oxygen     43.56 %  O
   Fluorine    0.10 %  F     0.10 % F
                -   %  F    -0.04 % -O=F2
             ______        ______ 
             100.00 %      100.01 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na7.12K0.26Ca3.11Sr0.43Ce0.26La0.11Nd0.03Mn2+1.33Fe2+0.15Fe3+1.67Zr3.14Ti0.13Hf0.04 Nb0.06Cl0.7F0.15H23.71O75.15
Help on Environment: Environment: In perialkaline pegmatites. Eudialyte group.
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Mount Karnasurt, Lovozero alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Recalls the Russian acronym IKRAN (Institut Kristallografii Rossiskoy Akadameii Nauky).
Help on Synonym: Synonym: IMA2000-010
 

Ikranite Image

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Ikranite

Comments: Top and bottom images of brownish yellow ikranite aggregate in a green matrix.
Location: Lovozero Massif, Kola Peninsula, Russia. Scale: 1 3/4" x 1".
© Chris Wright / Wrights Rock Shop

Ikranite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:2.12331
Help on Cell Dimensions: Cell Dimensions: a = 14.167, c = 30.081, Z = 3; V = 5,228.52 Den(Calc)= 2.63
Help on Crystal System: Crystal System: Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.841(1)(404), 2.963(0.92)(315), 4.3(0.91)(205),3.521(0.57)(027), 3.205(0.44)(208), 6.41(0.41)(104), 2.588(0.37)(039), 4.09(0.36)(116),
 

Physical Properties of Ikranite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brownish yellow.
Help on Density: Density: 2.82
Help on Diaphaniety: Diaphaniety: Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: yellowish white
 

Optical Properties of Ikranite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.057 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2333,KPDmeas= 0.2176,KC= 0.2207
Help on Optical Data: Optical Data: Uniaxial (+), w=1.612, e=1.615, bire=0.0030.
 

Calculated Properties of Ikranite

Help on Electron Density: Electron Density:

relectron=2.77 gm/cc
note: rIkranite =2.82 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.02583
Boson Index = 0.97417
Help on Photoelectric: Photoelectric:

PEIkranite = 30.89 barns/electron
U=PEIkranite x relectron= 85.43 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 2,128.84 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Ikranite - mild
Specimen
Size
Weight/Volume
(Sphere) *		 Calculated
Activity
Bequerols
(Bq)		 Calculated
Activity
Curies (Ci)		 Estimated
Activity
GR(api)		 Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 8.78 cm 45,584 1.23E-06 2,128.84 0.70
100 gm / 4.08 cm 4,558 1.23E-07 212.88 0.07
10 gm / 1.89 cm 456 1.23E-08 21.29 0.01
1 gm / 8.78 mm 46 1.23E-09 2.13 0.00
0.1 gm / 4.08 mm 5 1.23E-10 0.21 0.00
0.01 gm / 1.89 mm 0 1.23E-11 0.02 0.00
0.001 gm / 0.88 mm 0 1.23E-12 0.00 0.00

Weight of pure Ikranite in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.82 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 0.10 % Th) From Sum REE Elements ( 2.03 % REE)
 

Ikranite Classification
Help on Dana Class: Dana Class: 64.1.1.8 (64)Cyclosilicate Rings with Other Anions and Insular Silicate Groups
  (64.1)with mixed ring types
  (64.1.1)Eudialyte Group
 
64.1.1.1 Eudialyte Na4(Ca,Ce)2(Fe,Mn,Y)ZrSi8O22(OH,Cl)2(?) R 3m 3 2/m
 
64.1.1.2 Alluaivite Na19(Ca,Mn)6(Ti,Nb)3(Si3O9)2(Si10O28)2Cl·2(H2O) R 3m 3 2/m
 
64.1.1.3 Kentbrooksite! (Na,REE)15(Ca,REE)6MnZr3NbSi25O74F2·2(H2O) R 3m 3m
 
64.1.1.4 Khomyakovite! Na12Sr3Ca6Fe3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m
 
64.1.1.5 Manganokhomyakovite! Na12Sr3Ca6Mn3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m
 
64.1.1.6 Oneillite! Na15Ca3Mn3Fe3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3 3
 
64.1.1.7 Ferrokentbrooksite! Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3(Cl,F,OH)2 R 3m 3m
 
64.1.1.8 Ikranite ! (Na,H3O)15(Ca,Mn,REE)6Fe2Zr3([],Zr)([],Si)Si24O66(O,OH)6Cl·2-3H2O R 3m 3m
 
64.1.1.9 Feklichevite! Na11Ca9(Fe,Fe)2Zr3Nb[Si25O73](OH,H2O,Cl,O)5 R 3m 3m
 
64.1.1.10 Rastsvetaevite! Na27K8Ca12Fe3Zr6Si52O144(O,OH,H2O)6Cl2 R 3m 3m
 
64.1.1.11 Taseqite! Na12Sr3Ca6Fe3Zr3NbSi25O73(O,OH,H2O)3Cl2 R 3m 3m
 
64.1.1.12 Carbokentbrooksite! (Na,[])12(Na,Ce)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O R 3m 3m
 
64.1.1.13 Zirsilite-(Ce)! (Na,[])12(Ce,Na)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O R 3m 3m
 
64.1.1.14 Labyrinthite! (Na,K,Sr)35Ca12Fe3Zr6TiSi51O144(O,OH,H2O)9Cl3 R 3m 3m
 
64.1.1.15 Aqualite! (H3O)8(Na,K,Sr)5Ca6Zr3Si26O66(OH)9Cl R 3m 3m
 
64.1.1.16 Raslakite! Na15Ca3Fe3(Na,Zr)3Zr3(Si,Nb)(Si25O73)(OH,H2O)3(Cl,OH) R 3m 3m
 
64.1.1.17 Georgbarsanovite! Na12(Mn,Sr,REE)3Ca6Fe3Zr3NbSi25O76Cl2·H2O R 3m 3m
 
64.1.1.18 IMA2004-026! Na12(Ce,REE,Sr)3Ca6Mn3Zr3W(Si25O73)(OH)3(CO3)·H2O R 3m 3m
 
64.1.1.19 Mogovidite! Na9(Ca,Na)6Ca6Fe2Zr3[]Si25O72(CO3)(OH)4 R 3m 3m
Help on Strunz Class: Strunz Class: VIII/E.25-14 VIII - Silicates
  VIII/E - Cyklosilicates, triplet rings, nine-rings and ten-rings
  VIII/E.25 - Eudialyte - Alluaivite series
 
VIII/E.25-10 Eudialyte Na4(Ca,Ce)2(Fe,Mn,Y)ZrSi8O22(OH,Cl)2(?) R 3m 3 2/m
 
VIII/E.25-14 Ikranite (Na,H3O)15(Ca,Mn,REE)6Fe2Zr3([],Zr)([],Si)Si24O66(O,OH)6Cl·2-3H2O R 3m 3m
 
VIII/E.25-16 Raslakite! Na15Ca3Fe3(Na,Zr)3Zr3(Si,Nb)(Si25O73)(OH,H2O)3(Cl,OH) R 3m 3m
 
VIII/E.25-20 Ferrokentbrooksite! Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3(Cl,F,OH)2 R 3m 3m
 
VIII/E.25-30 Kentbrooksite! (Na,REE)15(Ca,REE)6MnZr3NbSi25O74F2·2(H2O) R 3m 3m
 
VIII/E.25-32 Carbokentbrooksite! (Na,[])12(Na,Ce)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O R 3m 3m
 
VIII/E.25-40 Oneillite! Na15Ca3Mn3Fe3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3 3
 
VIII/E.25-50 Feklichevite! Na11Ca9(Fe,Fe)2Zr3Nb[Si25O73](OH,H2O,Cl,O)5 R 3m 3m
 
VIII/E.25-56 Zirsilite-(Ce)! (Na,[])12(Ce,Na)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O R 3m 3m
 
VIII/E.25-58 Taseqite! Na12Sr3Ca6Fe3Zr3NbSi25O73(O,OH,H2O)3Cl2 R 3m 3m
 
VIII/E.25-60 Khomyakovite! Na12Sr3Ca6Fe3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m
 
VIII/E.25-70 Manganokhomyakovite! Na12Sr3Ca6Mn3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m
 
VIII/E.25-80 Alluaivite Na19(Ca,Mn)6(Ti,Nb)3(Si3O9)2(Si10O28)2Cl·2(H2O) R 3m 3 2/m
 

Other Ikranite Information
Help on References: References: NAME( CanMin, 42:926) PHYS. PROP.(CanMin, 42:926) OPTIC PROP.(CanMin, 42:926)
Help on See Also: See Also: Links to other databases for Ikranite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Ikranite

(Na,H3O)15(Ca,Mn,REE)6Fe+++2Zr3([ ],Zr)([ ],Si)Si24O66(O,OH)6Cl·2-3H2O
Dana No: 64.1.1.8 Strunz No: VIII/E.25-14
Locality:

 

Notes:

 
 
   
 
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