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Natrokomarovite Mineral Data

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General Natrokomarovite Information

Help on Chemical  Formula: Chemical Formula: Na6CaNb6[Si4O12F2•4(H2O)
Help on Composition: Composition: Molecular Weight = 1,359.81 gm
   Sodium     9.13 %  Na   12.31 % Na2O
   Calcium    2.36 %  Ca    3.30 % CaO
   Cerium     1.03 %  Ce    1.21 % Ce2O3
   Titanium   2.11 %  Ti    3.52 % TiO2
   Niobium   38.26 %  Nb   54.73 % Nb2O5
   Silicon    8.26 %  Si   17.67 % SiO2
   Hydrogen   0.59 %  H     5.30 % H2O
   Oxygen    35.18 %  O
   Fluorine   3.07 %  F     3.07 % F
               -   %   F    -1.29 % -O=F2    
            ______        ______ 
            100.00 %       99.82 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na5.4Ca0.8Ce0.1Ti0.6Nb5.6(Si4O12)O13.9F2.2�4(H2O)
Help on Environment: Environment: In alkalic syenites.
Help on IMA Status: IMA Status: Not Approved IMA 1979
Help on Locality: Locality: Ilimaussaq massif, Greenland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1979 for Vladimir M. Komarov (1927-1967), Russian cosmonaut who was killed during his return flight on April 23, 1967 and the sodium content.
Help on Synonym: Synonym: Na-komarovite - Renamed Natrokomarvovite by Mineralogical Record, v39 (2008), p131
  Silicified pyrochlore
  Sodium-Komarovite
 

Natrokomarovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.2972:1:0.301
Help on Cell Dimensions: Cell Dimensions: a = 7.31, b = 24.588, c = 7.402, Z = 2; V = 1,330.42 Den(Calc)= 3.39
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: C mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.149(1), 3.174(1), 12.364(0.9),
 

Physical Properties of Natrokomarovite

Help on Cleavage: Cleavage: {100} Perfect, {001} Fair
Help on Color: Color: White, Light yellowish white.
Help on Density: Density: 3.3
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Foliated - Two dimensional platy forms.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white
 

Optical Properties of Natrokomarovite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.054 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.026 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2554,KPDmeas= 0.2623,KC= 0.2488
Ncalc = 1.82 - 1.84
Help on Optical Data: Optical Data: Biaxial (-), a=1.809, b=1.876, g=1.912, bire=0.1030, 2V(Calc)=70, 2V(Meas)=72. Dispersion r >> v.
 

Calculated Properties of Natrokomarovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.23 gm/cc
note: Specific Gravity of Natrokomarovite =3.39 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0067914217
Boson Index = 0.9932085783
Help on Photoelectric: Photoelectric: PENatrokomarovite = 63.01 barns/electron
U=PENatrokomarovite x relectron= 203.25 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 1,045.91 (Gamma Ray American Petroleum Institute Units)
Concentration of Natrokomarovite per GRapi unit = 956.11 (PPM)

Estimated Radioactivity from Natrokomarovite - 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 / 8.26 cm 23,081 6.24E-07 1,045.91 0.34
100 gm / 3.83 cm 2,308 6.24E-08 104.59 0.03
10 gm / 1.78 cm 231 6.24E-09 10.46 0.00
1 gm / 8.26 mm 23 6.24E-10 1.05 0.00
0.1 gm / 3.83 mm 2 6.24E-11 0.10 0.00
0.01 gm / 1.78 mm 0 6.24E-12 0.01 0.00
0.001 gm / 0.83 mm 0 6.24E-13 0.00 0.00

Weight of pure Natrokomarovite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.39 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 ( 0.05 % Th) From Sum REE Elements ( 1.03 % REE)
 

Natrokomarovite Classification

Help on  Dana Class: Dana Class: 56.02.04.13 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.04)Cuspidine - Wohlerite group
 
56.02.04.01 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m
 
56.02.04.02 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m
 
56.02.04.03 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m
 
56.02.04.04 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m
 
56.02.04.05 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m
 
56.02.04.06 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m
 
56.02.04.07 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1
 
56.02.04.08 Rosenbuschite (Ca,Na)3(Zr,Ti)Si2O8F P1 1
 
56.02.04.09 Hainite Na4Ca8(Ti,Zr,Mn,Fe)3Si8O28F8 P1 1
 
56.02.04.10 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m
 
56.02.04.11 Jennite Ca9Si6O18(OH)6•8H2O P1 1
 
56.02.04.12 Komarovite (Ca,Mn)2(Nb,Ti)2Si2O7(O,F)2•3.5(H2O) Unk Ortho
 
56.02.04.13 Natrokomarovite* Na6CaNb6[Si4O12F2•4(H2O) C mmm 2/m 2/m 2/m
 
56.02.04.14 Suolunite Ca2Si2O5(OH)2•(H2O) F dd2 mm2
 
56.02.04.15 Mongolite Ca4Nb6Si5O24(OH)10•5(H2O) Unk Tetra
 
56.02.04.16 Kristiansenite! Ca2ScSn(Si2O7)(Si2O6OH) C1 1
 
56.02.04.17 Kochite! Na2(Na,Ca)4Ca4(Mn,Ca)2Zr2Ti2(Si2O7)4(O,F)4F4 P1 1
 
56.02.04.18 Marianoite! Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4 P 21 2/m
Help on  Strunz Class: Strunz Class: 09.CE.45 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),
 
09.CE.45 Komarovite (Ca,Mn)2(Nb,Ti)2Si2O7(O,F)2•3.5(H2O) Unk Ortho
 
09.CE.45 Natrokomarovite* Na6CaNb6[Si4O12F2•4(H2O) C mmm 2/m 2/m 2/m
 

Other Natrokomarovite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990, AmMin, v 88, p 935) OPTIC PROP.(AmMin, v 88, p 935)
Help on See Also: See Also: Links to other databases for Natrokomarovite :
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 Natrokomarovite Specimen Label here :

Natrokomarovite

Na6CaNb6[Si4O12F2•4(H2O)
Dana No: 56.02.04.13 Strunz No: 09.CE.45
Locality:

 

Notes:

 

 
   
 


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