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![Mineralogy Database Mineralogy Database](/images/Hedyphane_Crystal.gif) |
Shkatulkalite Mineral Data
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General Shkatulkalite Information
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Chemical Formula: |
{(Na,Mn,Ca,[ ])4[Nb2(O,H2O)4Si4O14](OH,F)2}•2(H2O,[ ]) |
Composition: |
Molecular Weight = 1,086.02 gm |
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Sodium 5.82 % Na |
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Calcium 0.92 % Ca |
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Manganese 5.06 % Mn |
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Niobium 17.11 % Nb |
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Silicon 10.34 % Si |
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Hydrogen 2.41 % H |
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Oxygen 57.46 % O |
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Fluorine 0.87 % F |
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______ |
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100.00 % |
Empirical Formula: |
Na2.75Mn2+Ca0.25Nb2O3•(H2O)(Si2O7)212(OH)1.5F0.5�3(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. |
Name Pronunciation: |
Shkatulkalite + Pronunciation |
Synonym: |
IMA1993-058 |
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Shkatulkalite Image |
Images:
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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 |
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Shkatulkalite Crystallography
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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)= 1.48 |
Crystal System: |
Monoclinic Space Group: P 2,Pm,P 2/m |
X Ray Diffraction: |
By Intensity(I/Io): 3.11(1), 15.56(0.9), 2.665(0.7),2.85(0.7), |
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Physical Properties of Shkatulkalite
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Cleavage: |
{001} Perfect, {100} Perfect |
Color: |
Colorless, Silvery white, Light pink, Creamy, Yellowish. |
Density: |
2.7 |
Diaphaneity: |
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 |
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Optical Properties of Shkatulkalite
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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. |
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Calculated Properties of Shkatulkalite
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Electron Density: |
Bulk Density (Electron Density)=1.47 gm/cc note: Specific Gravity of Shkatulkalite =1.48 gm/cc. |
Fermion Index: |
Fermion Index = 0.0051227011 Boson Index = 0.9948772989 |
Photoelectric: |
PEShkatulkalite = 26.30 barns/electron U=PEShkatulkalite x rElectron Density= 38.76 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Shkatulkalite is Not Radioactive |
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Shkatulkalite Classification
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Dana Class: |
56.02.07.03 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O |
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(56.02)with cations in [4] and/or >[4] coordination |
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(56.02.07)Murmanite group |
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56.02.07.01 Epistolite (Na,[])2{(Na,Ti)4[Nb2(O,H2O)4Si4O14](OH,F)2}•2H2O P1 1 |
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56.02.07.02 Murmanite (Na,[])2{(Na,Ti)4[Ti2(O,H2O)4Si4O14](OH,F)2}•2H2O P1 ? 1 |
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56.02.07.03 Shkatulkalite! {(Na,Mn,Ca,[])4[Nb2(O,H2O)4Si4O14](OH,F)2}•2(H2O,[]) P 2,Pm,P 2/m Mono |
Strunz Class: |
09.BE.50 09 - SILICATES (Germanates) |
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09.B - Sorosilicates |
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09.BE -Si2O7 groups with additional anions; |
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09.BE.50 Bornemanite BaNa3{(Na,Ti)4[(Ti,Nb)2O2Si4O14](F,OH)2}•PO4 I11b m |
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09.BE.50 Shkatulkalite! {(Na,Mn,Ca,[])4[Nb2(O,H2O)4Si4O14](OH,F)2}•2(H2O,[]) P 2,Pm,P 2/m Mono |
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09.BE.50 Bykovaite! BaNa{(Na,Ti)4[(Ti,Nb)2(OH,O)3Si4O14](OH,F)2}•3H2O I11b 2 |
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Other Shkatulkalite Information
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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 :
Shkatulkalite
{(Na,Mn,Ca,[ ])4[Nb2(O,H2O)4Si4O14](OH,F)2}•2(H2O,[ ])
Dana No: 56.02.07.03 Strunz No: 09.BE.50
Locality:
Notes:
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