General Zirsilite-(Ce) Information
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Chemical Formula: |
(Na,[ ])12(Ce, Na)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O |
Composition: |
Molecular Weight = 3,310.41 gm |
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Sodium 6.77 % Na 9.13 % Na2O |
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Calcium 7.26 % Ca 10.16 % CaO |
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Cerium 9.52 % Ce 11.15 % Ce2O3 |
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Zirconium 8.27 % Zr 11.17 % ZrO2 |
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Manganese 4.98 % Mn 6.43 % MnO |
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Niobium 2.81 % Nb 4.01 % Nb2O5 |
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Silicon 21.21 % Si 45.38 % SiO2 |
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Hydrogen 0.15 % H 1.36 % H2O |
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Carbon 0.36 % C 1.33 % CO2 |
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Oxygen 38.66 % O |
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______ ______ |
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100.00 % 100.12 % = TOTAL OXIDE |
Empirical Formula: |
Na9Ce2.25Na0.75Ca6Mn2+3Zr3NbSi25O73(OH)3(CO3)·(H2O) |
Environment: |
As zoned rhombohedral crystals up to 2 cm across, with a carbokentbrooksite core and a zirsilite-(Ce) rim. Eudialyte group; structure determined |
IMA Status: |
Approved IMA 2002 (Dana # Added) |
Locality: |
Dara-i-Pioz alkaline massif, Tajikistan. Link to MinDat.org Location Data. |
Name Origin: |
Reflects the chemical composition, ZIRconium, SILicon, Cerium). |
Synonym: |
IMA2002-057 |
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Search for Zirsilite-(Ce) Images |
Images:
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Zirsilite-(Ce) Crystallography
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Axial Ratios: |
a:c = 1:2.11089 |
Cell Dimensions: |
a = 14.248, c = 30.076, Z = 3; V = 5,287.60 Den(Calc)= 3.12 |
Crystal System: |
Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: R 3m |
X Ray Diffraction: |
By Intensity(I/Io): 3.22(1)(028), 2.979(0.95)(135), 2.857(0.88)(044),3.166(0.56)(127), 4.32(0.51)(025), 3.975(0.37)(032), 3.536(0.33)(027), |
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Physical Properties of Zirsilite-(Ce)
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Cleavage: |
None |
Color: |
Cream. |
Density: |
3.15 |
Diaphaniety: |
Transparent |
Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. |
Habit: |
Epitaxial - Crystallographic alignment with a precursor mineral |
Habit: |
Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals. |
Hardness: |
5 - Apatite |
Luster: |
Vitreous (Glassy) |
Streak: |
white |
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Optical Properties of Zirsilite-(Ce)
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Gladstone-Dale: |
CI meas= -0.002 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2059,KPDmeas= 0.204,KC= 0.2035 |
Optical Data: |
Uniaxial (-), e=1.637, w=1.648, bire=0.0110. |
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Calculated Properties of Zirsilite-(Ce)
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Electron Density: |
relectron=3.03 gm/cc note: rZirsilite-(Ce) =3.15 gm/cc. |
Fermion Index |
Fermion Index = 0.0195 Boson Index = 0.9805 |
Photoelectric: |
PEZirsilite-(Ce) = 63.93 barns/electron U=PEZirsilite-(Ce) x relectron= 194.03 barns/cc. |
Radioactivity: |
GRapi = 9,787.12 (Gamma Ray American Petroleum Institute Units)
Zirsilite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Radioactivity from Zirsilite-(Ce) - 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 / 8.46 cm |
213,321 |
5.77E-06 |
9,787.12 |
3.22 |
| 100 gm / 3.93 cm |
21,332 |
5.77E-07 |
978.71 |
0.32 |
| 10 gm / 1.82 cm |
2,133 |
5.77E-08 |
97.87 |
0.03 |
| 1 gm / 8.46 mm |
213 |
5.77E-09 |
9.79 |
0.00 |
| 0.1 gm / 3.93 mm |
21 |
5.77E-10 |
0.98 |
0.00 |
| 0.01 gm / 1.82 mm |
2 |
5.77E-11 |
0.10 |
0.00 |
| 0.001 gm / 0.85 mm |
0 |
5.77E-12 |
0.01 |
0.00 |
Weight of pure Zirsilite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.15 gm/cc.*
Goverment Estimate of Average Annual Exposure (
360 mRem)
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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 ( 0.48 % Th) From Sum REE Elements ( 9.52 % REE)
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Zirsilite-(Ce) Classification
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Dana Class: |
64.1.1.13 (64)Cyclosilicate Rings with Other Anions and Insular Silicate Groups |
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(64.1)with mixed ring types |
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(64.1.1)Eudialyte Group |
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64.1.1.1 Eudialyte Na4(Ca,Ce)2(Fe,Mn,Y)ZrSi8O22(OH,Cl)2(?) R 3m 3 2/m |
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64.1.1.2 Alluaivite Na19(Ca,Mn)6(Ti,Nb)3(Si3O9)2(Si10O28)2Cl·2(H2O) R 3m 3 2/m |
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64.1.1.3 Kentbrooksite! (Na,REE)15(Ca,REE)6MnZr3NbSi25O74F2·2(H2O) R 3m 3m |
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64.1.1.4 Khomyakovite! Na12Sr3Ca6Fe3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m |
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64.1.1.5 Manganokhomyakovite! Na12Sr3Ca6Mn3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m |
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64.1.1.6 Oneillite! Na15Ca3Mn3Fe3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3 3 |
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64.1.1.7 Ferrokentbrooksite! Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3(Cl,F,OH)2 R 3m 3m |
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64.1.1.8 Ikranite! (Na,H3O)15(Ca,Mn,REE)6Fe2Zr3([],Zr)([],Si)Si24O66(O,OH)6Cl·2-3H2O R 3m 3m |
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64.1.1.9 Feklichevite! Na11Ca9(Fe,Fe)2Zr3Nb[Si25O73](OH,H2O,Cl,O)5 R 3m 3m |
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64.1.1.10 Rastsvetaevite! Na27K8Ca12Fe3Zr6Si52O144(O,OH,H2O)6Cl2 R 3m 3m |
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64.1.1.11 Taseqite! Na12Sr3Ca6Fe3Zr3NbSi25O73(O,OH,H2O)3Cl2 R 3m 3m |
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64.1.1.12 Carbokentbrooksite! (Na,[])12(Na,Ce)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O R 3m 3m |
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64.1.1.13 Zirsilite-(Ce) ! (Na,[])12(Ce,Na)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O R 3m 3m |
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64.1.1.14 Labyrinthite! (Na,K,Sr)35Ca12Fe3Zr6TiSi51O144(O,OH,H2O)9Cl3 R 3m 3m |
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64.1.1.15 Aqualite! (H3O)8(Na,K,Sr)5Ca6Zr3Si26O66(OH)9Cl R 3m 3m |
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64.1.1.16 Raslakite! Na15Ca3Fe3(Na,Zr)3Zr3(Si,Nb)(Si25O73)(OH,H2O)3(Cl,OH) R 3m 3m |
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64.1.1.17 Georgbarsanovite! Na12(Mn,Sr,REE)3Ca6Fe3Zr3NbSi25O76Cl2·H2O R 3m 3m |
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64.1.1.18 IMA2004-026! Na12(Ce,REE,Sr)3Ca6Mn3Zr3W(Si25O73)(OH)3(CO3)·H2O R 3m 3m |
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64.1.1.19 Mogovidite! Na9(Ca,Na)6Ca6Fe2Zr3[]Si25O72(CO3)(OH)4 R 3m 3m |
Strunz Class: |
VIII/E.25-56 VIII - Silicates |
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VIII/E - Cyklosilicates, triplet rings, nine-rings and ten-rings |
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VIII/E.25 - Eudialyte - Alluaivite series |
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VIII/E.25-10 Eudialyte Na4(Ca,Ce)2(Fe,Mn,Y)ZrSi8O22(OH,Cl)2(?) R 3m 3 2/m |
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VIII/E.25-14 Ikranite! (Na,H3O)15(Ca,Mn,REE)6Fe2Zr3([],Zr)([],Si)Si24O66(O,OH)6Cl·2-3H2O R 3m 3m |
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VIII/E.25-16 Raslakite! Na15Ca3Fe3(Na,Zr)3Zr3(Si,Nb)(Si25O73)(OH,H2O)3(Cl,OH) R 3m 3m |
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VIII/E.25-20 Ferrokentbrooksite! Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3(Cl,F,OH)2 R 3m 3m |
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VIII/E.25-30 Kentbrooksite! (Na,REE)15(Ca,REE)6MnZr3NbSi25O74F2·2(H2O) R 3m 3m |
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VIII/E.25-32 Carbokentbrooksite! (Na,[])12(Na,Ce)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O R 3m 3m |
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VIII/E.25-40 Oneillite! Na15Ca3Mn3Fe3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3 3 |
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VIII/E.25-50 Feklichevite! Na11Ca9(Fe,Fe)2Zr3Nb[Si25O73](OH,H2O,Cl,O)5 R 3m 3m |
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VIII/E.25-56 Zirsilite-(Ce) (Na,[])12(Ce,Na)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O R 3m 3m |
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VIII/E.25-58 Taseqite! Na12Sr3Ca6Fe3Zr3NbSi25O73(O,OH,H2O)3Cl2 R 3m 3m |
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VIII/E.25-60 Khomyakovite! Na12Sr3Ca6Fe3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m |
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VIII/E.25-70 Manganokhomyakovite! Na12Sr3Ca6Mn3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m |
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VIII/E.25-80 Alluaivite Na19(Ca,Mn)6(Ti,Nb)3(Si3O9)2(Si10O28)2Cl·2(H2O) R 3m 3 2/m |
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Other Zirsilite-(Ce) Information
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References: |
NAME( CanMin, 42:1260) PHYS. PROP.(CanMin, 42:1260) OPTIC PROP.(CanMin, 42:1260) |
See Also: |
Links to other databases for Zirsilite-(Ce) :
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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Print or Cut-and-Paste your Zirsilite-(Ce) Specimen Label here :
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Zirsilite-(Ce)
(Na,[ ])12(Ce, Na)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O
Dana No: 64.1.1.13 Strunz No: VIII/E.25-56
Locality:
Notes:
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