Carbokentbrooksite Mineral Data

General Carbokentbrooksite Information

Chemical Formula:

(Na,[ ])12(Na,Ce)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)•H2O

Composition:

Molecular Weight = 3,121.55 gm

Potassium 0.45 % K 0.54 % K₂O

Sodium 8.01 % Na 10.79 % Na₂O

Strontium 1.26 % Sr 1.49 % SrO

Calcium 8.04 % Ca 11.25 % CaO

Lanthanum 1.60 % La 1.88 % La₂O₃

Cerium 2.69 % Ce 3.15 % Ce₂O₃

Praeseodymium 0.23 % Pr 0.26 % Pr₂O₃

Yttrium 0.37 % Y 0.47 % Y₂O₃

Zirconium 8.68 % Zr 11.72 % ZrO₂

Titanium 0.26 % Ti 0.44 % TiO₂

Manganese 0.97 % Mn 1.25 % MnO

Niobium 2.62 % Nb 3.75 % Nb₂O₅

Silicon 22.59 % Si 48.33 % SiO₂

Hydrogen 0.14 % H 1.25 % H₂O

Carbon 0.23 % C 0.83 % CO₂

Neodymium 0.69 % Nd 0.81 % Nd₂O₃

Chlorine 0.31 % Cl 0.31 % Cl

- % Cl -0.07 % -O=Cl₂

Oxygen 40.87 % O

______ ______

100.00 % 98.46 % = TOTAL OXIDE

Empirical Formula:

Na_9.48Ca_0.94K_0.36Na_1.39Sr_0.45Ce_0.6La_0.36Nd_0.15Pr_0.05Ca_5.32Mn²⁺_0.55Y_0.13Zr_2.97Nb_0.88 Ti_0.17Si_25.11O_73.62(OH)_4.34Cl_0.27(CO₃)_0.59

Environment:

From the quartz core of a zoned pegmatite. Forms the core of a zoned crystal with zirsilite-(Ce) rim. Eudialyte group; structure determined

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Dara-i-Pioz alkaline massif, Tajikistan. Link to MinDat.org Location Data.

Name Origin:

Named for it's relationship to kentbrooksite.

Synonym:

IMA2002-056

Carbokentbrooksite Image

Images:

Carbokentbrooksite

Comments: Orange carbokentbrooksite crystals in matrix.
Location: Dara-i-Pioz Glacier, Altai Range, Tajikistan. Scale: Specimen size: 31x25x20 mm.
© Sergey Vasiliev / Systematic Mineralogy

Carbokentbrooksite Crystallography

Axial Ratios:

a:c = 1:2.10962

Cell Dimensions:

a = 14.239, c = 30.039, Z = 3; V = 5,274.43 Den(Calc)= 2.95

Crystal System:

Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.849(1)(044), 2.97(0.83)(135), 3.204(0.38)(028),3.155(0.35)(127), 3.019(0.34)(042), 2.59(0.3)(.39), 6.39(0.25)(014), 4.3(0.24)(025), 2.134(0.23),

Physical Properties of Carbokentbrooksite

Cleavage:

None

Color:

Yellow.

Density:

3.14

Diaphaneity:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Carbokentbrooksite

Gladstone-Dale:

CI meas= -0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.067 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2169,KPDmeas= 0.2038,KC= 0.2034
Ncalc = 1.6 - 1.64

Optical Data:

Uniaxial (-), e=1.635, w=1.645, bire=0.0100.

Calculated Properties of Carbokentbrooksite

Electron Density:

Bulk Density (Electron Density)=3.05 gm/cc
note: Specific Gravity of Carbokentbrooksite =3.14 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Carbokentbrooksite}= 44.32 barns/electron
U=PE_{Carbokentbrooksite} x r_electron= 135.10 barns/cc.

Radioactivity:

GRapi = 5,405.72 (Gamma Ray American Petroleum Institute Units)
Concentration of Carbokentbrooksite per GRapi unit = 184.99 (PPM)

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

**Estimated Radioactivity from Carbokentbrooksite** - 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 / 8.47 cm	116,929	3.16E-06	5,405.72	1.78
100 gm / 3.93 cm	11,693	3.16E-07	540.57	0.18
10 gm / 1.83 cm	1,169	3.16E-08	54.06	0.02
1 gm / 8.47 mm	117	3.16E-09	5.41	0.00
0.1 gm / 3.93 mm	12	3.16E-10	0.54	0.00
0.01 gm / 1.83 mm	1	3.16E-11	0.05	0.00
0.001 gm / 0.85 mm	0	3.16E-12	0.01	0.00

Weight of pure Carbokentbrooksite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.14 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 ( 0.26 % Th) From Sum REE Elements ( 5.21 % REE)

Carbokentbrooksite Classification

Dana Class:

64.01.01.12 (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

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 Carbokentbrooksite Information

References:

NAME( CanMin, v 42, p 922) PHYS. PROP.(CanMin, v 42, p 922) OPTIC PROP.(CanMin, v 42, p 922)

See Also:

Links to other databases for Carbokentbrooksite :
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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Carbokentbrooksite

(Na,[ ])12(Na,Ce)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)•H2O
Dana No: 64.01.01.12 Strunz No: 09.CO.10
Locality:

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