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Nechelyustovite Mineral Data

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General Nechelyustovite Information

Help on Chemical  Formula: Chemical Formula: (Ba,Na)2{(Na,Ti,Mn)4[(Ti,Nb)2O2Si4O14](OH,O,F)2}•4.5H2O
Help on Composition: Composition: Molecular Weight = 880.23 gm
   Potassium   0.76 %  K     0.91 % K2O
   Barium     11.70 %  Ba   13.06 % BaO
   Sodium      5.75 %  Na    7.75 % Na2O
   Strontium   2.49 %  Sr    2.94 % SrO
   Calcium     0.96 %  Ca    1.34 % CaO
   Cerium      0.32 %  Ce    0.37 % Ce2O3
   Titanium   12.35 %  Ti   20.60 % TiO2
   Manganese   3.87 %  Mn    5.00 % MnO
   Niobium     7.07 %  Nb   10.12 % Nb2O5
   Iron        0.25 %  Fe    0.33 % FeO
   Silicon    12.76 %  Si   27.30 % SiO2
   Hydrogen    1.15 %  H    10.28 % H2O
   Oxygen     40.58 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba0.75Sr0.25K0.17Ce0.02Ca0.01Na2.2Ti0.94Mn2+0.62Ca0.2Fe2+0.04Ti1.33Nb0.67O2Si4 O14(H2O)0.7O1.3�4.32(H2O)
Help on Environment: Environment: Found in hydrothermally altered pegmatite body emplaced in the nepheline syenites near their contact with ijolite-urtites. Bafertisite series.
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: Kirov mine, Mount Kukisvumchorr, Khibina alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: N.A.
Help on Synonym: Synonym: IMA2006-021

Nechelyustovite Image

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Comments: Nechelyustovite aggregate.
Location: Kirovsky Mine, Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Russia. Scale: Grid Size 1 mm.
© Sergey Vasiliev / Systematic Mineralogy

Nechelyustovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7642:1:6.8323
Help on Cell Dimensions: Cell Dimensions: a = 5.38, b = 7.04, c = 48.1, Z = 4; beta = 91.1° V = 1,821.46 Den(Calc)= 3.21
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 24.06(1), 5.95(0.97), 7.05(0.9),3.95(0.6), 2.712(0.19), 2.828(0.16), 2.155(0.13),

Physical Properties of Nechelyustovite

Help on Cleavage: Cleavage: {001} Perfect, {100} Good
Help on Color: Color: Creamy, Grayish, Bluish, Yellowish.
Help on Density: Density: 3.32 - 3.42, Average = 3.37
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Help on Habit: Habit: Rosette - Bundled tabular aggregates resembling rose flower petals.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Nechelyustovite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.156 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.113 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2226,KPDmeas= 0.2121,KC= 0.2511
Ncalc = 1.81 - 1.86
Help on Optical Data: Optical Data: Biaxial (+), a=1.7, b=1.71, g=1.734, bire=0.0340

Calculated Properties of Nechelyustovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.08 gm/cc
note: Specific Gravity of Nechelyustovite =3.21 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PENechelyustovite = 67.43 barns/electron
U=PENechelyustovite x relectron= 207.99 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 336.76 (Gamma Ray American Petroleum Institute Units)
Concentration of Nechelyustovite per GRapi unit = 0.30 (%)

Estimated Radioactivity from Nechelyustovite - barely detectable


Nechelyustovite Classification

Help on  Dana Class: Dana Class: 56.02.06b.05 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.06b)Seidozerite - Lamprophyllite group (Bafertisite subgroup)
56.02.06b.01 Bafertisite Ba(Fe,Mn)2TiSi2O7(O,OH)2 Cm m
56.02.06b.02 Hejtmanite Ba(Mn,Fe)2TiO(Si2O7)(OH,F)2 P 21/m 2/m
56.02.06b.03 Nafertisite! Na3(Fe,Fe)6(Ti2Si12O34)(O,OH)7•2(H2O) A2/m 2/m
56.02.06b.04 Surkhobite! KBa3Ca2Na2(Mn,Fe,Fe)16Ti8(Si2O7)8O8(OH)4(F,O,OH)8 C 2 2
56.02.06b.05 Nechelyustovite! (Ba,Na)2{(Na,Ti,Mn)4[(Ti,Nb)2O2Si4O14](OH,O,F)2}•4.5H2O P 2/m 2/m
56.02.06b.06 Caryochroite! (Na,Sr)3(Fe,Mg)10[Ti2Si12O37](O,OH)9•8H2O P 2/n (?) 2/m
Help on  Strunz Class: Strunz Class: 09.BE.55 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
09.BE.55 Bafertisite Ba(Fe,Mn)2TiSi2O7(O,OH)2 Cm m
09.BE.55 Hejtmanite Ba(Mn,Fe)2TiO(Si2O7)(OH,F)2 P 21/m 2/m
09.BE.55 Nechelyustovite! (Ba,Na)2{(Na,Ti,Mn)4[(Ti,Nb)2O2Si4O14](OH,O,F)2}•4.5H2O P 2/m 2/m

Other Nechelyustovite Information

Help on References: References: NAME( EurJMin, v21:251) PHYS. PROP.(EurJMin, v21:251) OPTIC PROP.(EurJMin, v21:251)
Help on See Also: See Also: Links to other databases for Nechelyustovite :
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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Dana No: 56.02.06b.05 Strunz No: 09.BE.55





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