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Ferrokentbrooksite Mineral Data

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General Ferrokentbrooksite Information

Help on Chemical  Formula: Chemical Formula: Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3(Cl,F,OH)2
Help on Composition: Composition: Molecular Weight = 3,231.96 gm
   Potassium         0.39 %  K     0.47 % K2O
   Sodium            9.28 %  Na   12.51 % Na2O
   Strontium         0.41 %  Sr    0.48 % SrO
   Calcium           5.98 %  Ca    8.36 % CaO
   La,Ce,Pr,Nd,Sm,   4.41 %  RE    5.15 % REE2O3
   Yttrium           0.47 %  Y     0.59 % Y2O3
   Hafnium           0.17 %  Hf    0.20 % HfO2
   Zirconium         8.67 %  Zr   11.70 % ZrO2
   Tantalum          0.11 %  Ta    0.14 % Ta2O5
   Titanium          0.06 %  Ti    0.10 % TiO2
   Manganese         3.14 %  Mn    4.06 % MnO
   Niobium           1.84 %  Nb    2.63 % Nb2O5
   Aluminum          0.06 %  Al    0.11 % Al2O3
   Iron              4.13 %  Fe    5.31 % FeO
   Silicon          21.86 %  Si   46.77 % SiO2
   Hydrogen          0.04 %  H     0.33 % H2O
   Chlorine          0.98 %  Cl    0.98 % Cl
                      -   %   Cl   -0.22 % -O=Cl2   
   Oxygen           37.13 %  O
   Fluorine          0.89 %  F     0.89 % F
                      -   %   F    -0.37 % -O=F2    
                   ______        ______ 
                   100.00 %      100.19 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na13.05REE0.99K0.32Ca0.23Sr0.15Ca4.59Mn2+1.24Y0.17Fe2+2.39Mn2+0.61Zr3Ti0.04Hf0.03 Nb0.64Si0.23Zr0.07Ta0.02Si24.93Al0.07(OH)0.4
Help on Environment: Environment: Primary late-stage phase in a small pegmatite dike in nepheline syenite.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Poudrette Quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Fe-analogue of kentbrooksite.
Help on Synonym: Synonym: IMA1999-046
 

Ferrokentbrooksite Image

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  Ferrokentbrooksite

Comments: A crystal of red ferrokentbrooksite in matrix.
Location: Mont Saint-Hilaire, Quebec. Scale: Crystal size 1.5 mm.
© László Horváth

Ferrokentbrooksite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.10764
Help on Cell Dimensions: Cell Dimensions: a = 14.2277, c = 29.987, Z = 3; V = 5,256.94 Den(Calc)= 3.06
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): 2.968(1)(315), 2.847(0.98)(404), 3.391(0.51)(131),5.694(0.5)(202), 4.3(0.43)(205), 7.104(0.38)(110), 3.155(0.31)(217), 3.207(0.31)(208), 3.955(0.31)(214),
 

Physical Properties of Ferrokentbrooksite

Help on Cleavage: Cleavage: None
Help on Color: Color: Reddish brown, Red.
Help on Density: Density: 3.06
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Equant Grains - Granular material with equel dimensions in x, y, and z.
Help on Habit: Habit: Pseudo Octohedral - Crystals show an octohedral outline.
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Ferrokentbrooksite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.003 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2027,KPDmeas= 0.2027,KC= 0.2034
Ncalc = 1.62
Help on Optical Data: Optical Data: Uniaxial (-), e=1.6186, w=1.6221, bire=0.0035.
 

Calculated Properties of Ferrokentbrooksite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.96 gm/cc
note: Specific Gravity of Ferrokentbrooksite =3.06 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEFerrokentbrooksite = 47.82 barns/electron
U=PEFerrokentbrooksite x relectron= 141.60 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,574.68 (Gamma Ray American Petroleum Institute Units)
Concentration of Ferrokentbrooksite per GRapi unit = 218.59 (PPM)

Ferrokentbrooksite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Ferrokentbrooksite - 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 / 8.55 cm 99,277 2.68E-06 4,574.68 1.50
100 gm / 3.97 cm 9,928 2.68E-07 457.47 0.15
10 gm / 1.84 cm 993 2.68E-08 45.75 0.02
1 gm / 8.55 mm 99 2.68E-09 4.57 0.00
0.1 gm / 3.97 mm 10 2.68E-10 0.46 0.00
0.01 gm / 1.84 mm 1 2.68E-11 0.05 0.00
0.001 gm / 0.85 mm 0 2.68E-12 0.00 0.00

Weight of pure Ferrokentbrooksite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.06 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 ( 0.22 % Th) From Sum REE Elements ( 4.41 % REE)
 

Ferrokentbrooksite Classification

Help on  Dana Class: Dana Class: 64.01.01.07 (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 Ferrokentbrooksite Information

Help on References: References: NAME( CanMin, Vol 41, p 55) PHYS. PROP.(CanMin, Vol 41, p 55) OPTIC PROP.(CanMin, Vol 41, p 55)
Help on See Also: See Also: Links to other databases for Ferrokentbrooksite :
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 Ferrokentbrooksite Specimen Label here :

Ferrokentbrooksite

Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3(Cl,F,OH)2
Dana No: 64.01.01.07 Strunz No: 09.CO.10
Locality:

 

Notes:

 

 
   
 


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