Mineralogy Database

Shafranovskite Mineral Data

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General Shafranovskite Information

Help on Chemical  Formula: Chemical Formula: K2Na3(Mn++,Fe++,Na)4[Si9(O,OH)27](OH)2•n(H2O), n~2.33
Help on Composition: Composition: Molecular Weight = 1,051.58 gm
   Potassium   6.62 %  K     7.97 % K2O
   Sodium      5.47 %  Na    7.37 % Na2O
   Calcium     0.15 %  Ca    0.21 % CaO
   Magnesium   0.09 %  Mg    0.15 % MgO
   Manganese  13.17 %  Mn   17.00 % MnO
   Aluminum    0.31 %  Al    0.58 % Al2O3
   Iron        3.35 %  Fe    4.30 % FeO
   Silicon    24.04 %  Si   51.42 % SiO2
   Hydrogen    1.20 %  H    10.74 % H2O
   Oxygen     45.61 %  O
             ______        ______ 
             100.00 %       99.76 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2.5K1.78Mn2+2.52Fe2+0.63Ca0.04Mg0.046(Al0.02)Si9O23.71�6.27(H2O)
Help on Environment: Environment: Produced by late-stage crystallization of alkalic nepheline syenite magmas in pegmatites in differentiated alkalic massifs. Hydrous manganese phyllosilicate.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: On Mts. Rasvumchorr, Niorkpakhk, Koashkar, and Koashva, Khibiny massif, and at the Jubilee pegmatite, Mt. Karnasurt, and several other localities in the Lovozero massif, Kola Peninsula Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Ilarion Ilarionovich Shafranovskii (1907-1994), mineralogist and crystallographer at the Mining Institute, St. Petersburg, Russia.
Help on Name Pronunciation: Name Pronunciation: Shafranovskite + Pronunciation Say SHAFRANOVSKITE

Shafranovskite Image

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Comments: Yellow-brown fine grained shafranovskite with red eudialyte and black aegirine.
Location: Mount Rasvumchorr, Khibiny Massif, Kola Peninsular, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Shafranovskite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.45065
Help on Cell Dimensions: Cell Dimensions: a = 14.519, c = 21.062, Z = 6; V = 3,845.07 Den(Calc)= 2.72
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: P 31c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.54(1), 3.51(0.7), 2.787(0.6),

Physical Properties of Shafranovskite

Help on Cleavage: Cleavage: {0001} Good
Help on Color: Color: Yellow green, Yellow orange, Olive green.
Help on Density: Density: 2.76 - 2.78, Average = 2.76
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: greenish white

Optical Properties of Shafranovskite

Help on Dichroism (e): Dichroism (e): pale yellow green.
Help on Dichroism (w): Dichroism (w): pale yellow green.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.036 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2127,KPDmeas= 0.2088,KC= 0.2166
Ncalc = 1.59 - 1.6
Help on Optical Data: Optical Data: Uniaxial (-), e=1.57, w=1.587, bire=0.0170.

Calculated Properties of Shafranovskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.70 gm/cc
note: Specific Gravity of Shafranovskite =2.72 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEShafranovskite = 5.99 barns/electron
U=PEShafranovskite x relectron= 16.17 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 94.77 (Gamma Ray American Petroleum Institute Units)
Concentration of Shafranovskite per GRapi unit = 1.06 (%)

Estimated Radioactivity from Shafranovskite - barely detectable


Shafranovskite Classification

Help on  Dana Class: Dana Class: (78)Unclassified silicates
  (78.03)possible cyclosilicates
  (78.03.02)Dana Group Shafranovskite K2Na3(Mn,Fe,Na)4[Si9(O,OH)27](OH)2•n(H2O),n~2.33 P 31c 3m
Help on  Strunz Class: Strunz Class: 09.EE.65 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EE -Single tetrahedral nets of 6-membered rings
09.EE.65 Shafranovskite K2Na3(Mn,Fe,Na)4[Si9(O,OH)27](OH)2•n(H2O),n~2.33 P 31c 3m
09.EE.65 Zakharovite Na4Mn5Si10O24(OH)6•6(H2O) P 31m,P 3m1 3m

Other Shafranovskite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2, AmMin 89:1816) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Shafranovskite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Shafranovskite Specimen Label here :


K2Na3(Mn++,Fe++,Na)4[Si9(O,OH)27](OH)2•n(H2O), n~2.33
Dana No: Strunz No: 09.EE.65





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