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Labuntsovite-Mg Mineral Data

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General Labuntsovite-Mg Information

Help on Chemical  Formula: Chemical Formula: Na4K4(Ba,K)(Mg,Fe)1+xTi8(Si4O12)4(O,OH)8•10(H2O)
Help on Composition: Composition: Molecular Weight = 2,384.94 gm
   Potassium   7.21 %  K     8.69 % K2O
   Barium      5.76 %  Ba    6.43 % BaO
   Sodium      3.47 %  Na    4.68 % Na2O
   Magnesium   0.71 %  Mg    1.18 % MgO
   Titanium   14.45 %  Ti   24.11 % TiO2
   Niobium     2.73 %  Nb    3.90 % Nb2O5
   Aluminum    0.11 %  Al    0.21 % Al2O3
   Iron        1.17 %  Fe    1.20 % FeO /  0.33 % Fe2O3
   Silicon    18.72 %  Si   40.06 % SiO2
   Hydrogen    1.04 %  H     9.33 % H2O
   Oxygen     44.61 %  O
             ______        ______ 
             100.00 %      100.13 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na3.6K4.4(H2O)2.2BaMg0.7Fe2+0.4Ti7.2Nb0.7Fe3+0.1Si15.9Al0.1O52.4(OH)3.5�8.4(H2O)
Help on Environment: Environment: Occurs with catapleiite and anatase in cavities within dolomitic carbonatite. Labuntsovite group, structure.
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Kovdor massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Mg dominant member of the labuntsovite subgroup.
Help on Name Pronunciation: Name Pronunciation: Labuntsovite-Mg + Pronunciation Say LABUNTSOVITE-MG
Help on Synonym: Synonym: IMA1998-050

Labuntsovite-Mg Image

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Comments: Orange-brown crystal of labuntsovite-Mg, sitting on a bed of platy catapleiite crystals, with dolomite.
Location: Zheleznyi Mine (Iron Mine), Kovdor Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Crystal Size 0.15 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Labuntsovite-Mg Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0394:1:0.5666
Help on Cell Dimensions: Cell Dimensions: a = 14.292, b = 13.75, c = 7.792, Z = 1; beta = 117.03° V = 1,363.99 Den(Calc)= 2.90
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.175(1)(400,402,421), 3.093(0.57)(022), 3.083(0.55)(041),3.024(0.51)(240,241), 2.576(0.48)(241,242), 6.94(0.3)(001),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

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

Warning: this java applet does not work in some browsers because of security restrictions.


Physical Properties of Labuntsovite-Mg

Help on Cleavage: Cleavage: {001} Imperfect, {???} Imperfect
Help on Color: Color: Colorless, Yellowish white, Pink, Light orange.
Help on Density: Density: 2.88
Help on Diaphaneity: Diaphaneity: Translucent to transparent
Help on Fracture: Fracture: Stepped - Fracture surfaces resemble stair case steps
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Labuntsovite-Mg

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.031 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.037 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2508,KPDmeas= 0.2525,KC= 0.2605
Ncalc = 1.75 - 1.76
Help on Optical Data: Optical Data: Biaxial (+), a=1.688, b=1.692, g=1.802, bire=0.1140

Calculated Properties of Labuntsovite-Mg

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.82 gm/cc
note: Specific Gravity of Labuntsovite-Mg =2.88 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PELabuntsovite-Mg = 31.76 barns/electron
U=PELabuntsovite-Mg x relectron= 89.60 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 101.99 (Gamma Ray American Petroleum Institute Units)
Concentration of Labuntsovite-Mg per GRapi unit = 0.98 (%)

Estimated Radioactivity from Labuntsovite-Mg - barely detectable


Labuntsovite-Mg Classification

Help on  Dana Class: Dana Class: 60.01.03e.02 (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-Mg Information

Help on References: References: NAME( AmMin, v 87, p 1733) PHYS. PROP.(AmMin, v 87, p 1733) OPTIC PROP.(AmMin, v 87, p 1733)
Help on See Also: See Also: Links to other databases for Labuntsovite-Mg :
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: 60.01.03e.02 Strunz No: 09.CE.30e





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