Labuntsovite-Mn Mineral Data

Labuntsovite-Mn Mineral Data
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General Labuntsovite-Mn Information

Help on Chemical Formula: Chemical Formula: Na4K4(Ba,K)(Mn,Fe)1+x(Ti,Nb)8[Si4O12]4(O,OH)8•n(H2O), n=10-12
Help on Composition: Composition: Molecular Weight = 2,232.12 gm
   Potassium   5.96 %  K     7.17 % K2O
   Barium      8.00 %  Ba    8.93 % BaO
   Sodium      2.37 %  Na    3.19 % Na2O
   Calcium     0.90 %  Ca    1.26 % CaO
   Magnesium   0.22 %  Mg    0.36 % MgO
   Titanium   15.44 %  Ti   25.77 % TiO2
   Manganese   1.72 %  Mn    2.22 % MnO
   Niobium     0.83 %  Nb    1.19 % Nb2O5
   Aluminum    0.73 %  Al    1.37 % Al2O3
   Iron        1.00 %  Fe    1.43 % Fe2O3
   Silicon    18.37 %  Si   39.30 % SiO2
   Hydrogen    0.87 %  H     7.79 % H2O
   Oxygen     43.59 %  O
             ______        ______ 
             100.00 %       99.99 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K3.4Na2.3Ba1.3Mn2+0.7Ca0.5Ti7.2Fe3+0.4Nb0.2Mg0.2Si14.6Al0.6O46.32(OH)9.7·4.8(H2O)
Help on Environment: Environment: A hydrothermal alteration product of murmanite in alkalic pegmatites in a differentiated alkalic massif and in carbonatite. Renamed labunsovite in 1955 from titanoelpidite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1926 (Dana # Changed from 60.1.3.2)
Help on Locality: Locality: In the Lovozero, Khibiny, and Kovdor massifs and the Vuoriyarvi carbonatite complex, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Aleksander Nikolaevich Labuntsov and Ekaterina Eutikhieva Labuntsov-Kostyleva, Russian mineralogists.
Help on Name Pronunciation: Name Pronunciation: Labuntsovite-Mn + Pronunciation Say LABUNTSOVITE-MN
Help on Synonym: Synonym: IMA2000-A
  Labuntsovite - (60.1.3.2)
  Titanoelpidite
 

Labuntsovite-Mn Image

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Labuntsovite-Mn

Comments: Cinnamon colored crystals of labuntsovite-Mn to 3 mm on dolomite matrix.
Location: Kovdor Mine, Kola Peninsula, Russia. Scale: Picture size 1.5x2 cm.
© John Veevaert

Labuntsovite-Mn Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.956:1:0.885
Help on Cell Dimensions: Cell Dimensions: a = 14.8, b = 15.48, c = 13.7, Z = 2; beta = 117° V = 2,796.62 Den(Calc)= 2.65
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.15(1), 1.543(0.9), 2.56(0.9),
Help on Forms: Forms:

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Forms: ( 0 1 0) ( 0 1 1) ( 1 1 0) ( 0 0 1)

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Rastsvetaeva R K , Chukanov N V , Pekov I V , Shlyukova Z V , Khomyakov A P , Crystallography Reports , 43 (1998) p.820-827, Structures of two potassium-rich labuntsovites in relation to the crystal chemistry, of minerals of the labuntsovite-nenadkevichite family, Sample: I

 

Physical Properties of Labuntsovite-Mn

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Brownish yellow, Pink, Reddish brown.
Help on Density: Density: 2.89 - 3.02, Average = 2.95
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Subconchoidal - Brittle frature with subconchoidal fragments
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: white
 

Optical Properties of Labuntsovite-Mn

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.047 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.062 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2755,KPDmeas= 0.247,KC= 0.2593
Ncalc = 1.69 - 1.78
Help on Optical Data: Optical Data: Biaxial (+), a=1.684-1.695, b=1.693-1.702, g=1.792-1.814, bire=0.1080-0.1190, 2V(Calc)=30-36, 2V(Meas)=20-44.
Help on Pleochroism (x): Pleochroism (x): yellowish.
Help on Pleochroism (z): Pleochroism (z): yellowish brown.
 

Calculated Properties of Labuntsovite-Mn

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.88 gm/cc
note: Specific Gravity of Labuntsovite-Mn =2.96 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PELabuntsovite-Mn = 38.89 barns/electron
U=PELabuntsovite-Mn x relectron= 112.00 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 83.77 (Gamma Ray American Petroleum Institute Units)
Concentration of Labuntsovite-Mn per GRapi unit = 1.19 (%)

Estimated Radioactivity from Labuntsovite-Mn - barely detectable

 

Labuntsovite-Mn Classification
Help on Dana Class: Dana Class: 60.01.03e.01 (60)Cyclosilicate Four-Membered Rings
  (60.01)as Titanosilicates
  (60.01.03e)Labuntsovite Group (Labuntsovite subgroup Monoclinic [C2/m])
 
60.01.03e.01 Labuntsovite-Mn! Na4K4(Ba,K)(Mn,Fe)1x(Ti,Nb)8[Si4O12]4(O,OH)8•n(H2O),n=10-12 I2/m 2/m
 
60.01.03e.02 Labuntsovite-Mg! Na4K4(Ba,K)(Mg,Fe)1xTi8(Si4O12)4(O,OH)8•10(H2O) C 2/m 2/m
 
60.01.03e.03 Labuntsovite-Fe! Na4K4(Ba,K)2(Fe,Mg,Mn)1xTi8(Si4O12)4(O,OH)8•10(H2O) C 2/m 2/m
 
60.01.03e.04 Paratsepinite-Na! (Na,Sr,K,Ca)7(Ti,Nb)8[Si4O12]4(O,OH)8•n(H2O)n~8 C 2/m 2/m
 
60.01.03e.05 Gjerdingenite-Mn! (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4•6(H2O) C 2/m 2/m
 
60.01.03e.06 Gjerdingenite-Fe! K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]•4(H2O) C 2/m 2/m
 
60.01.03e.07 Gjerdingenite-Ca! K2Ca(Nb,Ti)4(Si4O12)2(O,OH)4•6H2O C 2/m 2/m
 
60.01.03e.08 Gjerdingenite-Na! (K,Na)2Na(Nb,Ti)4(Si4O12)2(OH,O)4•5H2O C 2/m 2/m
Help on Strunz Class: Strunz Class: 09.CE.30e 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),
 
09.CE.30e Labuntsovite-Mn Na4K4(Ba,K)(Mn,Fe)1x(Ti,Nb)8[Si4O12]4(O,OH)8•n(H2O),n=10-12 I2/m 2/m
 
09.CE.30e Labuntsovite-Mg! Na4K4(Ba,K)(Mg,Fe)1xTi8(Si4O12)4(O,OH)8•10(H2O) C 2/m 2/m
 
09.CE.30e Labuntsovite-Fe! Na4K4(Ba,K)2(Fe,Mg,Mn)1xTi8(Si4O12)4(O,OH)8•10(H2O) C 2/m 2/m
 

Other Labuntsovite-Mn Information
Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Labuntsovite-Mn :
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 Labuntsovite-Mn Specimen Label here :

Labuntsovite-Mn

Na4K4(Ba,K)(Mn,Fe)1+x(Ti,Nb)8[Si4O12]4(O,OH)8•n(H2O), n=10-12
Dana No: 60.01.03e.01 Strunz No: 09.CE.30e
Locality:

 

Notes: