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Shkatulkalite Mineral Data

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General Shkatulkalite Information

Help on Chemical  Formula: Chemical Formula: {(Na,Mn,Ca,[ ])4[Nb2(O,H2O)4Si4O14](OH,F)2}•2(H2O,[ ])
Help on Composition: Composition: Molecular Weight = 1,086.02 gm
   Sodium      5.82 %  Na
   Calcium     0.92 %  Ca
   Manganese   5.06 %  Mn
   Niobium    17.11 %  Nb
   Silicon    10.34 %  Si
   Hydrogen    2.41 %  H
   Oxygen     57.46 %  O
   Fluorine    0.87 %  F
             100.00 % 
Help on Empirical Formula: Empirical Formula: Na2.75Mn2+Ca0.25Nb2O3•(H2O)(Si2O7)212(OH)1.5F0.5�3(H2O)
Help on Environment: Environment: In hyperagpaitic pegmatites. Similar to epistolite and murmanite.
Help on IMA Status: IMA Status: Approved IMA 1996 (Dana # Added)
Help on Locality: Locality: Mount Alluaiv in the northwestern part of the Lovozero Alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the Shkatulka vein in which the mineral was found.
Help on Name Pronunciation: Name Pronunciation: Shkatulkalite + Pronunciation Say SHKATULKALITE
Help on Synonym: Synonym: IMA1993-058

Shkatulkalite Image

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  Shkatulkalite   Manganoneptunite

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

Help on Axial Ratios: Axial Ratios: a:b:c =0.7615:1:4.3314
Help on Cell Dimensions: Cell Dimensions: a = 5.468, b = 7.18, c = 31.1, Z = 1; beta = 94° V = 1,218.02 Den(Calc)= 1.48
Help on Crystal System: Crystal System: Monoclinic Space Group: P 2,Pm,P 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.11(1), 15.56(0.9), 2.665(0.7),2.85(0.7),

Physical Properties of Shkatulkalite

Help on Cleavage: Cleavage: {001} Perfect, {100} Perfect
Help on Color: Color: Colorless, Silvery white, Light pink, Creamy, Yellowish.
Help on Density: Density: 2.7
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Micaceous - Platy texture with "flexible" plates.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Pearly
Help on Streak: Streak: white

Optical Properties of Shkatulkalite

Help on Optical Data: 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.
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.

Calculated Properties of Shkatulkalite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.47 gm/cc
note: Specific Gravity of Shkatulkalite =1.48 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0051227011
Boson Index = 0.9948772989
Help on Photoelectric: Photoelectric: PEShkatulkalite = 26.30 barns/electron
U=PEShkatulkalite x rElectron Density= 38.76 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Shkatulkalite is Not Radioactive

Shkatulkalite Classification

Help on  Dana Class: Dana Class: (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.07)Murmanite group Epistolite (Na,[])2{(Na,Ti)4[Nb2(O,H2O)4Si4O14](OH,F)2}•2H2O P1 1 Murmanite (Na,[])2{(Na,Ti)4[Ti2(O,H2O)4Si4O14](OH,F)2}•2H2O P1 ? 1 Shkatulkalite! {(Na,Mn,Ca,[])4[Nb2(O,H2O)4Si4O14](OH,F)2}•2(H2O,[]) P 2,Pm,P 2/m Mono
Help on  Strunz Class: Strunz Class: 09.BE.50 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
09.BE.50 Bornemanite BaNa3{(Na,Ti)4[(Ti,Nb)2O2Si4O14](F,OH)2}•PO4 I11b m
09.BE.50 Shkatulkalite! {(Na,Mn,Ca,[])4[Nb2(O,H2O)4Si4O14](OH,F)2}•2(H2O,[]) P 2,Pm,P 2/m Mono
09.BE.50 Bykovaite! BaNa{(Na,Ti)4[(Ti,Nb)2(OH,O)3Si4O14](OH,F)2}•3H2O I11b 2

Other Shkatulkalite Information

Help on See Also: See Also: Links to other databases for Shkatulkalite :
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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Print or Cut-and-Paste your Shkatulkalite Specimen Label here :


{(Na,Mn,Ca,[ ])4[Nb2(O,H2O)4Si4O14](OH,F)2}•2(H2O,[ ])
Dana No: Strunz No: 09.BE.50





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