Voronkovite Mineral Data

General Voronkovite Information

Chemical Formula:

Na15(Na,Ca,Ce)3(Mn,Ca)3Fe3Zr3Si26O72(OH,O)4Cl•H2O

Composition:

Molecular Weight = 3,126.11 gm

Potassium 0.24 % K 0.29 % K₂O

Sodium 11.83 % Na 15.94 % Na₂O

Strontium 1.51 % Sr 1.79 % SrO

Calcium 2.22 % Ca 3.10 % CaO

Lanthanum 0.80 % La 0.94 % La₂O₃

Cerium 1.17 % Ce 1.36 % Ce₂O₃

Hafnium 0.23 % Hf 0.27 % HfO₂

Zirconium 10.51 % Zr 14.19 % ZrO₂

Titanium 0.20 % Ti 0.33 % TiO₂

Manganese 3.62 % Mn 4.67 % MnO

Niobium 0.62 % Nb 0.89 % Nb₂O₅

Aluminum 0.08 % Al 0.15 % Al₂O₃

Iron 2.75 % Fe 3.54 % FeO

Silicon 23.28 % Si 49.80 % SiO₂

Hydrogen 0.18 % H 1.57 % H₂O

Neodymium 0.60 % Nd 0.70 % Nd₂O₃

Chlorine 0.44 % Cl 0.44 % Cl

- % Cl -0.10 % -O=Cl₂

Oxygen 39.53 % O

Fluorine 0.21 % F 0.21 % F

- % F -0.09 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na_13.96Sr_0.54K_0.19Na_1.64Ca_0.92Ce_0.26La_0.18Mn²⁺_2.06Ca_0.81Nd_0.13Fe²⁺_1.54Zr_0.6Na_0.48 Nb_0.21Ti_0.13Hf_0.04Zr₃Si_1.91Al_0.09�1.23(H₂O)

Environment:

Found in the hyperagpaitic pegmatite body. Eudialyte group.

IMA Status:

Approved IMA 2007 (Dana # Added)

Locality:

Mt. Alluaiv, Lovozero alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Alexander A. Voronkov (1928-1982), a prominent Russian crystallographer.

Synonym:

IMA2007-023

Voronkovite Image

Images:

Voronkovite

Comments: Brownish red cleavage fragment of voronkovite.
Location: Alluaiv Mt., Lovozero Massif, Kola Peninsula, Russia. Scale: Specimen Size 5 x 2 mm.
© Sergey Vasiliev / Systematic Mineralogy

Voronkovite Crystallography

Axial Ratios:

a:c = 1:2.13058

Cell Dimensions:

a = 14.205, c = 30.265, Z = 3; V = 5,288.76 Den(Calc)= 2.94

Crystal System:

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

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

By Intensity(I/I_o): 2.97(1), 4.316(0.85), 2.848(0.84),3.221(0.43), 3.039(0.41), 3.536(0.41), 3.166(0.37), 2.157(0.34),

Physical Properties of Voronkovite

Cleavage:

None

Color:

Light brown.

Density:

2.97

Diaphaneity:

Transparent

Fracture:

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

Habit:

Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Voronkovite

Gladstone-Dale:

CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.209,KPDmeas= 0.2069,KC= 0.2048
Ncalc = 1.6 - 1.61

Optical Data:

Uniaxial (+), w=1.61, e=1.619, bire=0.0090.

Calculated Properties of Voronkovite

Electron Density:

Bulk Density (Electron Density)=2.88 gm/cc
note: Specific Gravity of Voronkovite =2.97 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Voronkovite= 34.35 barns/electron
U=PE_Voronkovite x r_electron= 98.91 barns/cc.

Radioactivity:

GRapi = 2,656.27 (Gamma Ray American Petroleum Institute Units)
Concentration of Voronkovite per GRapi unit = 376.47 (PPM)

**Estimated Radioactivity from Voronkovite** - 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 / 8.63 cm	57,528	1.55E-06	2,656.27	0.87
100 gm / 4.01 cm	5,753	1.55E-07	265.63	0.09
10 gm / 1.86 cm	575	1.55E-08	26.56	0.01
1 gm / 8.63 mm	58	1.55E-09	2.66	0.00
0.1 gm / 4.01 mm	6	1.55E-10	0.27	0.00
0.01 gm / 1.86 mm	1	1.55E-11	0.03	0.00
0.001 gm / 0.86 mm	0	1.55E-12	0.00	0.00

Weight of pure Voronkovite in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.97 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 ( 0.13 % Th) From Sum REE Elements ( 2.56 % REE)

Voronkovite Classification

Dana Class:

64.01.01.22 (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 Voronkovite Information

References:

NAME( Russian Mineralogical Soc., v138:66) PHYS. PROP.(Russian Mineralogical Soc., v138:66) OPTIC PROP.(Russian Mineralogical Soc., v138:66)

See Also:

Links to other databases for Voronkovite :
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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Voronkovite

Na15(Na,Ca,Ce)3(Mn,Ca)3Fe3Zr3Si26O72(OH,O)4Cl•H2O
Dana No: 64.01.01.22 Strunz No: 09.CO.10
Locality:

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