Shkatulkalite Mineral Data

Shkatulkalite Mineral Data +

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General Shkatulkalite Information

Chemical Formula:

Na10Mn++Ti3Nb3(Si2O7)6(OH)2F·12(H2O)

Composition:

Molecular Weight = 1,985.39 gm

Sodium 11.58 % Na 15.61 % Na₂O

Titanium 7.23 % Ti 12.07 % TiO₂

Manganese 2.77 % Mn 3.57 % MnO

Niobium 14.04 % Nb 20.08 % Nb₂O₅

Silicon 16.98 % Si 36.32 % SiO₂

Hydrogen 1.32 % H 11.80 % H₂O

Oxygen 45.13 % O

Fluorine 0.96 % F 0.96 % F

- % F -0.40 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₁₀Mn²⁺Ti₃Nb₃(Si₂O₇)₆(OH)₂F·12(H₂O)

Environment:

In hyperagpaitic pegmatites. Similar to epistolite and murmanite.

IMA Status:

Approved IMA 1996 (Dana # Added)

Locality:

Mount Alluaiv in the northwestern part of the Lovozero Alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

For the Shkatulka vein in which the mineral was found.

Synonym:

IMA1993-058

Shkatulkalite Image

Images:

Click Here for Larger Shkatulkalite Image

Shkatulkalite Mangan-neptunite

Comments: Pearly white shkatulkalite with brown mangan-neptunite grains.
Location: Shkatulka pegmatite, Umbozero mine, Alluaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 4.5 mm.
© Thomas Witzke / Abraxas-Verlag

Shkatulkalite Crystallography

Axial Ratios:

a:b:c =0.7615:1:4.3314

Cell Dimensions:

a = 5.468, b = 7.18, c = 31.1, Z = 1; beta = 94° V = 1,218.02 Den(Calc)= 2.71

Crystal System:

MonoclinicSpace Group: P 2,Pm,P 2/m

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

By Intensity(I/I_o): 3.11(1), 15.56(0.9), 2.665(0.7),2.85(0.7),

Physical Properties of Shkatulkalite

Cleavage:

[001] Perfect, [100] Perfect

Color:

Colorless, Silvery white, Light pink, Creamy, Yellowish.

Density:

2.7

Diaphaniety:

Transparent to Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Micaceous - Platy texture with "flexible" plates.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3 - Calcite

Luminescence:

Non-fluorescent.

Luster:

Pearly

Streak:

white

Optical Properties of Shkatulkalite

Gladstone-Dale:

CI meas= 0.078 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.081 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2335,KPDmeas= 0.2343,KC= 0.254

Optical Data:

Biaxial (+), a=1.608, b=1.63, g=1.66, bire=0.0520, 2V(Calc)=84, 2V(Meas)=82. Dispersion r < v moderate.

Pleochroism (x):

none.

Pleochroism (y):

none.

Pleochroism (z):

none.

Calculated Properties of Shkatulkalite

Electron Density:

r_electron=2.65 gm/cc
note: r_{Shkatulkalite}=2.70 gm/cc.

Fermion Index

Fermion Index = 0.0175
Boson Index = 0.9825

Photoelectric:

PE_{Shkatulkalite}= 22.96 barns/electron
U=PE_{Shkatulkalite} x r_electron= 60.90 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Shkatulkalite is Not Radioactive

Shkatulkalite Classification

Dana Class:

56.2.7.3 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O

(56.2)with cations in [4] and/or >[4] coordination

(56.2.7)Murmanite group

56.2.7.1 Epistolite Na4Nb2Ti(Si2O7)2O2(OH)2·4(H2O) P1 1

56.2.7.2 Murmanite Na3(Ti,Nb)4(Si2O7)2O4·4(H2O) P1 ? 1

56.2.7.3 Shkatulkalite ! Na10MnTi3Nb3(Si2O7)6(OH)2F·12(H2O) P 2,Pm,P 2/m Mono

Strunz Class:

VIII/C.13-27 VIII - Silicates

VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F]

VIII/C.13 - Rosenbuschite - Lamprophyllite - Hejtmanite series

VIII/C.13-05 Grenmarite! (Zr,Mn)2(Zr,Ti)(Mn,Na)(Na,Ca)4(Si2O7)2(O,F)4 P 2/c 2/m

VIII/C.13-10 Seidozerite (Na,Ca)2(Zr,Ti,Mn)2Si2O7(O,F)2 P 2/c 2/m

VIII/C.13-15 Nabalamprophyllite! Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2} P 2/m 2/m

VIII/C.13-20 Lamprophyllite Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2 C 2/m 2/m

VIII/C.13-25 Kukisvumite Na6ZnTi4Si8O28·4(H2O) Pccn 2/m 2/m 2/m

VIII/C.13-27 Shkatulkalite Na10MnTi3Nb3(Si2O7)6(OH)2F·12(H2O) P 2,Pm,P 2/m Mono

VIII/C.13-30 Barytolamprophyllite Ba2Na3(Fe,Ti)3(Si2O7)2(O,OH,F)4 C 2/m 2/m

VIII/C.13-40 Ericssonite BaMn2FeO[Si2O7](OH) C 2/m 2/m

VIII/C.13-50 Orthoericssonite BaMn2(FeO)Si2O7(OH) Pmmn 2/m 2/m 2/m

Other Shkatulkalite Information

References:

NAME( MinRec, Vol. 28, No. 3) PHYS. PROP.(Am.Min.,Vol.82,p432,1997) OPTIC PROP.(MinRec, Vol. 28, No. 3)

See Also:

Links to other databases for Shkatulkalite :
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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Shkatulkalite

Na10Mn++Ti3Nb3(Si2O7)6(OH)2F·12(H2O)
Dana No: 56.2.7.3 Strunz No: VIII/C.13-27
Locality:

Notes: