Labuntsovite-Mn Mineral Data

Advertisment

For more than thirty (30) years, Excalibur Mineral Corp. has been providing private collectors, researchers, major universities and museums throughout the world with reliably identified, rare and unusual mineral samples for science an

A Bijoux.com is an online store specialized in the sale on the internet of precious stones , gems , minerals and jewels for individuals and professionals

Exceptional Minerals features excellent, high quality mineral specimens for sale. We also have a weekly Best Offer Mineral Auction.

Your premier supplier of quality mineral specimens from Southern Africa and the world at large

General Labuntsovite-Mn Information

Chemical Formula:

Na4K4(Ba,K)(Mn,Fe)1+x(Ti,Nb)8[Si4O12]4(O,OH)8•n(H2O), n=10-12

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

Empirical Formula:

K_3.4Na_2.3Ba_1.3Mn²⁺_0.7Ca_0.5Ti_7.2Fe³⁺_0.4Nb_0.2Mg_0.2Si_14.6Al_0.6O_46.32(OH)_9.7·4.8(H₂O)

Environment:

A hydrothermal alteration product of murmanite in alkalic pegmatites in a differentiated alkalic massif and in carbonatite. Renamed labunsovite in 1955 from titanoelpidite.

IMA Status:

Valid Species (Pre-IMA) 1926 (Dana # Changed from 60.1.3.2)

Locality:

In the Lovozero, Khibiny, and Kovdor massifs and the Vuoriyarvi carbonatite complex, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Aleksander Nikolaevich Labuntsov and Ekaterina Eutikhieva Labuntsov-Kostyleva, Russian mineralogists.

Name Pronunciation:

Labuntsovite-Mn + Pronunciation

Synonym:

IMA2000-A

Labuntsovite - (60.1.3.2)

Titanoelpidite

Labuntsovite-Mn Image

Images:

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

Axial Ratios:

a:b:c =0.956:1:0.885

Cell Dimensions:

a = 14.8, b = 15.48, c = 13.7, Z = 2; beta = 117° V = 2,796.62 Den(Calc)= 2.65

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.15(1), 1.543(0.9), 2.56(0.9),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
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 large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

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

Cleavage:

{100} Perfect

Color:

Brownish yellow, Pink, Reddish brown.

Density:

2.89 - 3.02, Average = 2.95

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Subconchoidal - Brittle frature with subconchoidal fragments

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

6 - Orthoclase

Luster:

Greasy (Oily)

Streak:

white

Optical Properties of Labuntsovite-Mn

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

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.

Pleochroism (x):

yellowish.

Pleochroism (z):

yellowish brown.

Calculated Properties of Labuntsovite-Mn

Electron Density:

Bulk Density (Electron Density)=2.88 gm/cc
note: Specific Gravity of Labuntsovite-Mn =2.96 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_{Labuntsovite-Mn}= 38.89 barns/electron
U=PE_{Labuntsovite-Mn} x r_electron= 112.00 barns/cc.

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

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

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

References:

NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)

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

Search for Labuntsovite-Mn using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Labuntsovite-Mn :

A Bijoux Google Search for Labuntsovite-Mn
Adam's Minerals Google Search for Labuntsovite-Mn
Cape Minerals Google Search for Labuntsovite-Mn
Dakota Matrix Minerals Google Search for Labuntsovite-Mn
Excalibur Mineral Corp. Google Search for Labuntsovite-Mn
Exceptional Minerals Google Search for Labuntsovite-Mn
John Betts Fine Minerals Search for Labuntsovite-Mn
McDougall Minerals Google Search for Labuntsovite-Mn
Mineral News Website Link
Rock and Mineral Shows Google Search for Labuntsovite-Mn
Weinrich Minerals, Inc. Google Search for Labuntsovite-Mn

Ask about Labuntsovite-Mn here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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: