Alluaivite Mineral Data

Alluaivite Mineral Data +

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General Alluaivite Information

Chemical Formula:

Na19(Ca,Mn++)6(Ti,Nb)3(Si3O9)2(Si10O28)2Cl·2(H2O)

Composition:

Molecular Weight = 2,169.25 gm

Sodium 20.14 % Na 27.14 % Na₂O

Calcium 8.31 % Ca 11.63 % CaO

Titanium 4.97 % Ti 8.29 % TiO₂

Manganese 3.80 % Mn 4.91 % MnO

Niobium 3.21 % Nb 4.60 % Nb₂O₅

Silicon 20.72 % Si 44.32 % SiO₂

Hydrogen 0.19 % H 1.66 % H₂O

Chlorine 3.27 % Cl 3.27 % Cl

- % Cl -0.74 % -O=Cl₂

Oxygen 35.40 % O

______ ______

100.00 % 105.07 % = TOTAL OXIDE

Empirical Formula:

Na₁₉Ca_4.5Mn²⁺_1.5Ti_2.25Nb_0.75Si₁₆O₄₆Cl₂·2(H₂O)

Environment:

In ultra-agpaitic pegmatites in a differentiated alkalic massif.

IMA Status:

Approved IMA 1990

Locality:

On Mt. Alluaiv, In the Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

For its occurrence on Mt. Alluaiv, Kola Peninsula, Russia.

Synonym:

ICSD 39342

IMA1988-052

PDF 45-1385

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Alluaivite Crystallography

Axial Ratios:

a:c = 1:4.31439

Cell Dimensions:

a = 14.046, c = 60.6, Z = 8; V = 10,354.01 Den(Calc)= 2.78

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 2.825(1), 2.96(1), 7.14(0.8),

Crystal Structure:

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Rastsvetaeva R K , Khomyakov A P , Andrianov V I , Gusev A I , Doklady Akademii Nauk SSSR , 312 (1990) p.1379-1383, Crystal structure of alluaivite, Note: eudialyte-type structure

Physical Properties of Alluaivite

Cleavage:

None

Color:

Brownish pink, Colorless.

Density:

2.76

Diaphaniety:

Transparent

Hardness:

5-6 - Between Apatite and Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Alluaivite

Gladstone-Dale:

CI meas= 0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.063 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2237,KPDmeas= 0.2254,KC= 0.2387

Optical Data:

Uniaxial (+), w=1.618, e=1.626, bire=0.0080.

Calculated Properties of Alluaivite

Electron Density:

r_electron=2.70 gm/cc
note: r_Alluaivite=2.76 gm/cc.

Fermion Index

Fermion Index = 0.01637
Boson Index = 0.98363

Photoelectric:

PE_Alluaivite= 8.75 barns/electron
U=PE_Alluaivite x r_electron= 23.66 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Alluaivite is Not Radioactive

Alluaivite Classification

Dana Class:

64.1.1.2 (64)Cyclosilicate Rings with Other Anions and Insular Silicate Groups

(64.1)with mixed ring types

(64.1.1)Eudialyte Group

64.1.1.1 Eudialyte Na4(Ca,Ce)2(Fe,Mn,Y)ZrSi8O22(OH,Cl)2(?) R 3m 3 2/m

64.1.1.2 Alluaivite Na19(Ca,Mn)6(Ti,Nb)3(Si3O9)2(Si10O28)2Cl·2(H2O) R 3m 3 2/m

64.1.1.3 Kentbrooksite! (Na,REE)15(Ca,REE)6MnZr3NbSi25O74F2·2(H2O) R 3m 3m

64.1.1.4 Khomyakovite! Na12Sr3Ca6Fe3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m

64.1.1.5 Manganokhomyakovite! Na12Sr3Ca6Mn3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m

64.1.1.6 Oneillite! Na15Ca3Mn3Fe3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3 3

64.1.1.7 Ferrokentbrooksite! Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3(Cl,F,OH)2 R 3m 3m

64.1.1.8 Ikranite! (Na,H3O)15(Ca,Mn,REE)6Fe2Zr3([],Zr)([],Si)Si24O66(O,OH)6Cl·2-3H2O R 3m 3m

64.1.1.9 Feklichevite! Na11Ca9(Fe,Fe)2Zr3Nb[Si25O73](OH,H2O,Cl,O)5 R 3m 3m

64.1.1.10 Rastsvetaevite! Na27K8Ca12Fe3Zr6Si52O144(O,OH,H2O)6Cl2 R 3m 3m

64.1.1.11 Taseqite! Na12Sr3Ca6Fe3Zr3NbSi25O73(O,OH,H2O)3Cl2 R 3m 3m

64.1.1.12 Carbokentbrooksite! (Na,[])12(Na,Ce)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O R 3m 3m

64.1.1.13 Zirsilite-(Ce)! (Na,[])12(Ce,Na)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O R 3m 3m

64.1.1.14 Labyrinthite! (Na,K,Sr)35Ca12Fe3Zr6TiSi51O144(O,OH,H2O)9Cl3 R 3m 3m

64.1.1.15 Aqualite! (H3O)8(Na,K,Sr)5Ca6Zr3Si26O66(OH)9Cl R 3m 3m

64.1.1.16 Raslakite! Na15Ca3Fe3(Na,Zr)3Zr3(Si,Nb)(Si25O73)(OH,H2O)3(Cl,OH) R 3m 3m

64.1.1.17 Georgbarsanovite! Na12(Mn,Sr,REE)3Ca6Fe3Zr3NbSi25O76Cl2·H2O R 3m 3m

64.1.1.18 IMA2004-026! Na12(Ce,REE,Sr)3Ca6Mn3Zr3W(Si25O73)(OH)3(CO3)·H2O R 3m 3m

64.1.1.19 Mogovidite! Na9(Ca,Na)6Ca6Fe2Zr3[]Si25O72(CO3)(OH)4 R 3m 3m

Strunz Class:

VIII/E.25-80 VIII - Silicates

VIII/E - Cyklosilicates, triplet rings, nine-rings and ten-rings

VIII/E.25 - Eudialyte - Alluaivite series

VIII/E.25-10 Eudialyte Na4(Ca,Ce)2(Fe,Mn,Y)ZrSi8O22(OH,Cl)2(?) R 3m 3 2/m

VIII/E.25-14 Ikranite! (Na,H3O)15(Ca,Mn,REE)6Fe2Zr3([],Zr)([],Si)Si24O66(O,OH)6Cl·2-3H2O R 3m 3m

VIII/E.25-16 Raslakite! Na15Ca3Fe3(Na,Zr)3Zr3(Si,Nb)(Si25O73)(OH,H2O)3(Cl,OH) R 3m 3m

VIII/E.25-20 Ferrokentbrooksite! Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3(Cl,F,OH)2 R 3m 3m

VIII/E.25-30 Kentbrooksite! (Na,REE)15(Ca,REE)6MnZr3NbSi25O74F2·2(H2O) R 3m 3m

VIII/E.25-32 Carbokentbrooksite! (Na,[])12(Na,Ce)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O R 3m 3m

VIII/E.25-40 Oneillite! Na15Ca3Mn3Fe3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3 3

VIII/E.25-50 Feklichevite! Na11Ca9(Fe,Fe)2Zr3Nb[Si25O73](OH,H2O,Cl,O)5 R 3m 3m

VIII/E.25-56 Zirsilite-(Ce)! (Na,[])12(Ce,Na)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O R 3m 3m

VIII/E.25-58 Taseqite! Na12Sr3Ca6Fe3Zr3NbSi25O73(O,OH,H2O)3Cl2 R 3m 3m

VIII/E.25-60 Khomyakovite! Na12Sr3Ca6Fe3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m

VIII/E.25-70 Manganokhomyakovite! Na12Sr3Ca6Mn3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2 R 3m 3m

VIII/E.25-80 Alluaivite Na19(Ca,Mn)6(Ti,Nb)3(Si3O9)2(Si10O28)2Cl·2(H2O) R 3m 3 2/m

Other Alluaivite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)

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Alluaivite

Na19(Ca,Mn++)6(Ti,Nb)3(Si3O9)2(Si10O28)2Cl·2(H2O)
Dana No: 64.1.1.2 Strunz No: VIII/E.25-80
Locality:

Notes: