Mineralogy Database

Dualite Mineral Data

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General Dualite Information

Help on Chemical  Formula: Chemical Formula: Na30(Ca,Na,Ce,Sr)12(Na,Mn,Fe,Ti)6Zr3Ti3MnSi51O144(OH,H2O,Cl)9
Help on Composition: Composition: Molecular Weight = 5,953.87 gm
   Potassium         0.07 %  K     0.08 % K2O
   Barium            0.23 %  Ba    0.26 % BaO
   Sodium           13.20 %  Na   17.80 % Na2O
   Strontium         1.16 %  Sr    1.37 % SrO
   Calcium           5.76 %  Ca    8.05 % CaO
   La,Ce,Pr,Nd,Sm,   3.07 %  RE    3.58 % REE2O3
   Zirconium         4.00 %  Zr    5.40 % ZrO2
   Titanium          2.65 %  Ti    4.41 % TiO2
   Manganese         2.00 %  Mn    2.59 % MnO
   Niobium           1.36 %  Nb    1.94 % Nb2O5
   Aluminum          0.10 %  Al    0.20 % Al2O3
   Iron              0.82 %  Fe    1.05 % FeO
   Silicon          24.03 %  Si   51.42 % SiO2
   Hydrogen          0.16 %  H     1.39 % H2O
   Chlorine          0.58 %  Cl    0.58 % Cl
                      -   %   Cl   -0.13 % -O=Cl2   
   Oxygen           40.81 %  O
                   ______        ______ 
                   100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na29.79Ba0.1K0.1Ca8.55Na1.39REE1.27Sr0.79Na3.01Mn2+1.35Fe2+0.87Ti0.77Zr2.61Nb0.39 Ti2.52Nb0.48Mn2+0.82Si0.18Si50.77Cl0.98
Help on Environment: Environment: Found as sporadic, irregularly shaped grains up to 0.3-0.5 mm across in a peralkaline pegmatoid. Eudialyte group.
Help on IMA Status: IMA Status: Approved IMA 2005 (Dana # Added)
Help on Locality: Locality: Mt. Alluaiv, Lovozero alkaline massif, Kola Peninsula, Russia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name is derived from Latin dualis (dual) alluding to the dual taxonomic membership of this mineral, which is at the same time zirconosilicate and titanosilicate.
Help on Synonym: Synonym: IMA2005-019
 

Dualite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:4.29025
Help on Cell Dimensions: Cell Dimensions: a = 14.153, c = 60.72, Z = 3; V = 10,533.18 Den(Calc)= 2.82
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.964(1), 2.839(0.9), 1.77(0.6),1.362(0.5), 4.31(0.5), 7.11(0.4), 2.675(0.3),
 

Physical Properties of Dualite

Help on Color: Color: Yellow.
Help on Density: Density: 2.84
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Dualite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.019 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2168,KPDmeas= 0.2153,KC= 0.2128
Ncalc = 1.6
Help on Optical Data: Optical Data: Uniaxial (+), w=1.61, e=1.613, bire=0.0030.
 

Calculated Properties of Dualite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.77 gm/cc
note: Specific Gravity of Dualite =2.84 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEDualite = 30.33 barns/electron
U=PEDualite x relectron= 84.17 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,213.61 (Gamma Ray American Petroleum Institute Units)
Concentration of Dualite per GRapi unit = 311.18 (PPM)

Estimated Radioactivity from Dualite - 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 / 8.76 cm 69,071 1.87E-06 3,213.61 1.06
100 gm / 4.07 cm 6,907 1.87E-07 321.36 0.11
10 gm / 1.89 cm 691 1.87E-08 32.14 0.01
1 gm / 8.76 mm 69 1.87E-09 3.21 0.00
0.1 gm / 4.07 mm 7 1.87E-10 0.32 0.00
0.01 gm / 1.89 mm 1 1.87E-11 0.03 0.00
0.001 gm / 0.88 mm 0 1.87E-12 0.00 0.00

Weight of pure Dualite in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.84 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 ( 0.15 % Th) From Sum REE Elements ( 3.07 % REE)
 

Dualite Classification

Help on  Dana Class: Dana Class: 64.01.01.21 (64)Cyclosilicates
  (64.01)Cyclosilicate Rings with Other Anions and Insular Silicate Groups with mixed ring types
  (64.01.01)Eudialyte Group
 
64.01.01.01 Eudialyte Na4(Ca,Ce)2(Fe,Mn,Y)ZrSi8O22(OH,Cl)2(?) R 3m 3 2/m
 
64.01.01.02 Alluaivite Na19(Ca,Mn)6(Ti,Nb)3(Si3O9)2(Si10O28)2Cl•2(H2O) R 3m 3 2/m
 
64.01.01.03 Kentbrooksite! (Na,REE)15(Ca,REE)6MnZr3NbSi25O74F2•2(H2O) R 3m 3m
 
64.01.01.04 Khomyakovite! Na12Sr3Ca6Fe3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m
 
64.01.01.05 Manganokhomyakovite! Na12Sr3Ca6Mn3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m
 
64.01.01.06 Oneillite! Na15Ca3Mn3Fe3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3 3
 
64.01.01.07 Ferrokentbrooksite! Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3(Cl,F,OH)2 R 3m 3m
 
64.01.01.08 Ikranite! (Na,H3O)15(Ca,Mn,REE)6Fe2Zr3([],Zr)([],Si)Si24O66(O,OH)6Cl•2-3H2O R 3m 3m
 
64.01.01.09 Feklichevite! Na11Ca9(Fe,Fe)2Zr3Nb[Si25O73](OH,H2O,Cl,O)5 R 3m 3m
 
64.01.01.10 Rastsvetaevite! Na27K8Ca12Fe3Zr6Si52O144(O,OH,H2O)6Cl2 R 3m 3m
 
64.01.01.11 Taseqite! Na12Sr3Ca6Fe3Zr3NbSi25O73(O,OH,H2O)3Cl2 R 3m 3m
 
64.01.01.12 Carbokentbrooksite! (Na,[])12(Na,Ce)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)•H2O R 3m 3m
 
64.01.01.13 Zirsilite-(Ce)! (Na,[])12(Ce,Na)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)•H2O R 3m 3m
 
64.01.01.14 Labyrinthite! (Na,K,Sr)35Ca12Fe3Zr6TiSi51O144(O,OH,H2O)9Cl3 R 3m 3m
 
64.01.01.15 Aqualite! (H3O)8(Na,K,Sr)5Ca6Zr3Si26O66(OH)9Cl R 3m 3m
 
64.01.01.16 Raslakite! Na15Ca3Fe3(Na,Zr)3Zr3(Si,Nb)(Si25O73)(OH,H2O)3(Cl,OH) R 3m 3m
 
64.01.01.17 Georgbarsanovite! Na12(Mn,Sr,REE)3Ca6Fe3Zr3NbSi25O76Cl2•H2O R 3m 3m
 
64.01.01.18 Johnsenite-(Ce)! Na12(Ce,REE,Sr)3Ca6Mn3Zr3W(Si25O73)(CO3)(OH,Cl)2 R 3m 3m
 
64.01.01.19 Golyshevite! (Na,Ca)10Ca9(Fe,Fe)2Zr3NbSi25O72(CO3)(OH)3•H2O R 3m 3m
 
64.01.01.20 Mogovidite! Na9(Ca,Na)6Ca6Fe2Zr3[]Si25O72(CO3)(OH)4 R 3m 3m
 
64.01.01.21 Dualite! Na30(Ca,Na,Ce,Sr)12(Na,Mn,Fe,Ti)6Zr3Ti3MnSi51O144(OH,H2O,Cl)9 R 3m 3m
 
64.01.01.22 Voronkovite! Na15(Na,Ca,Ce)3(Mn,Ca)3Fe3Zr3Si26O72(OH,O)4Cl•H2O R 3 3
Help on  Strunz Class: Strunz Class: 09.CO.10 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CO -[Si9O27]18- 9-membered rings
 
09.CO.10 Alluaivite Na19(Ca,Mn)6(Ti,Nb)3(Si3O9)2(Si10O28)2Cl•2(H2O) R 3m 3 2/m
 
09.CO.10 Eudialyte Na4(Ca,Ce)2(Fe,Mn,Y)ZrSi8O22(OH,Cl)2(?) R 3m 3 2/m
 
09.CO.10 Kentbrooksite! (Na,REE)15(Ca,REE)6MnZr3NbSi25O74F2•2(H2O) R 3m 3m
 
09.CO.10 Labyrinthite! (Na,K,Sr)35Ca12Fe3Zr6TiSi51O144(O,OH,H2O)9Cl3 R 3m 3m
 
09.CO.10 Carbokentbrooksite! (Na,[])12(Na,Ce)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)•H2O R 3m 3m
 
09.CO.10 Zirsilite-(Ce)! (Na,[])12(Ce,Na)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)•H2O R 3m 3m
 
09.CO.10 Mogovidite! Na9(Ca,Na)6Ca6Fe2Zr3[]Si25O72(CO3)(OH)4 R 3m 3m
 
09.CO.10 Voronkovite! Na15(Na,Ca,Ce)3(Mn,Ca)3Fe3Zr3Si26O72(OH,O)4Cl•H2O R 3 3
 
09.CO.10 Taseqite! Na12Sr3Ca6Fe3Zr3NbSi25O73(O,OH,H2O)3Cl2 R 3m 3m
 
09.CO.10 Aqualite! (H3O)8(Na,K,Sr)5Ca6Zr3Si26O66(OH)9Cl R 3m 3m
 
09.CO.10 Raslakite! Na15Ca3Fe3(Na,Zr)3Zr3(Si,Nb)(Si25O73)(OH,H2O)3(Cl,OH) R 3m 3m
 
09.CO.10 Feklichevite! Na11Ca9(Fe,Fe)2Zr3Nb[Si25O73](OH,H2O,Cl,O)5 R 3m 3m
 
09.CO.10 Ikranite! (Na,H3O)15(Ca,Mn,REE)6Fe2Zr3([],Zr)([],Si)Si24O66(O,OH)6Cl•2-3H2O R 3m 3m
 
09.CO.10 Khomyakovite! Na12Sr3Ca6Fe3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m
 
09.CO.10 Manganokhomyakovite! Na12Sr3Ca6Mn3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m
 
09.CO.10 Oneillite! Na15Ca3Mn3Fe3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3 3
 
09.CO.10 Ferrokentbrooksite! Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3(Cl,F,OH)2 R 3m 3m
 
09.CO.10 Rastsvetaevite! Na27K8Ca12Fe3Zr6Si52O144(O,OH,H2O)6Cl2 R 3m 3m
 
09.CO.10 Johnsenite-(Ce)! Na12(Ce,REE,Sr)3Ca6Mn3Zr3W(Si25O73)(CO3)(OH,Cl)2 R 3m 3m
 
09.CO.10 Georgbarsanovite! Na12(Mn,Sr,REE)3Ca6Fe3Zr3NbSi25O76Cl2•H2O R 3m 3m
 
09.CO.10 Golyshevite! (Na,Ca)10Ca9(Fe,Fe)2Zr3NbSi25O72(CO3)(OH)3•H2O R 3m 3m
 
09.CO.10 Dualite! Na30(Ca,Na,Ce,Sr)12(Na,Mn,Fe,Ti)6Zr3Ti3MnSi51O144(OH,H2O,Cl)9 R 3m 3m
 

Other Dualite Information

Help on References: References: NAME( Geology of Ore Deposits, v50:574) PHYS. PROP.(Geology of Ore Deposits, v50:574) OPTIC PROP.(Geology of Ore Deposits, v50:574)
Help on See Also: See Also: Links to other databases for Dualite :
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 Dualite Specimen Label here :

Dualite

Na30(Ca,Na,Ce,Sr)12(Na,Mn,Fe,Ti)6Zr3Ti3MnSi51O144(OH,H2O,Cl)9
Dana No: 64.01.01.21 Strunz No: 09.CO.10
Locality:

 

Notes:

 

 
   
 


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