Labuntsovite-Mn Mineral Data

Labuntsovite-Mn Mineral Data +

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)

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.

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),

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Physical Properties of Labuntsovite-Mn

Cleavage:

[100] Perfect

Color:

Brownish yellow, Pink, Reddish brown.

Density:

2.89 - 3.02, Average = 2.95

Diaphaniety:

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

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:

r_electron=2.88 gm/cc
note: r_{Labuntsovite-Mn}=2.96 gm/cc.

Fermion Index

Fermion Index = 0.04346
Boson Index = 0.95654

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)

Estimated Radioactivity from Labuntsovite-Mn - barely detectable

Labuntsovite-Mn Classification

Dana Class:

60.1.3e.1 (60)Cyclosilicate Four-Membered Rings

(60.1)as Titanosilicates

(60.1.3e)Labuntsovite Group (Labuntsovite subgroup Monoclinic [C2/m])

60.1.3e.1 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

60.1.3e.2 Labuntsovite-Mg! Na4K4(Ba,K)(Mg,Fe)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m

60.1.3e.3 Labuntsovite-Fe! Na4K4(Ba,K)2(Fe,Mg,Mn)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m

60.1.3e.4 Paratsepinite-Na! (Na,Sr,K,Ca)7(Ti,Nb)8[Si4O12]4(O,OH)8·n(H2O)n~8 C 2/m 2/m

60.1.3e.5 Gjerdingenite-Mn! (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m

Strunz Class:

VIII/E.07-155 VIII - Silicates

VIII/E - Cyklosilicates, quadruplet rings [Si4O11]8-

VIII/E.07 - Labuntsovite Group

VIII/E.07-10 Korobitsynite! Na3(Ti,Nb)2[Si4O12](OH,O)2·3-4(H2O) Pbam 2/m 2/m 2/m

VIII/E.07-20 Nenadkevichite (Na,Ca,K)(Nb,Ti)Si2O6(O,OH)·2(H2O) Pbam 2/m 2/m 2/m

VIII/E.07-30* Strontiochevkinite (Sr,REE)4Fe(Ti,Zr)2Ti2Si4O22 C 2/a 2/m

VIII/E.07-30 Tsepinite-Na! (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O)2·3(H2O) Cm m

VIII/E.07-32 Tsepinite-K! (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·3(H2O) Cm m

VIII/E.07-33 Tsepinite-Ca! (Ca,K,Na,[])2(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m

VIII/E.07-34 Paratsepinite-Ba! (Ba,Na,K)2-x(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O) C 2/m 2/m

VIII/E.07-40 Vuoriyarvite-K! (K,Na)2(Nb,Ti)2Si4O12(O,OH)2·4(H2O) Cm m

VIII/E.07-50 Clinophosinaite! Na3CaPSiO7 P 2/c 2/m

VIII/E.07-50* Kuzmenkoite-Zn! K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4·6-8(H2O) Cm m

VIII/E.07-60* Kuzmenkoite-Mn! (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4·5(H2O) C 2/m 2/m

VIII/E.07-60 Phosinaite-(Ce)! Na13Ca2Ce[Si4O12](PO4)4 P 22121 2 2 2

VIII/E.07-70 Gjerdingenite-Fe! K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]·4(H2O) C 2/m 2/m

VIII/E.07-80 Gjerdingenite-Mn! (K,Na)2(Mn,Fe)(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m

VIII/E.07-90 Karupmollerite-Ca! (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4·7(H2O) C 2/m 2/m

VIII/E.07-100 Lemmleinite-K! NaK2(Ti,Nb)2Si4O12(O,OH)2·2(H2O) C 2/m 2/m

VIII/E.07-110 Lemmleinite-Ba! Na2K2Ba1-xTi4(Si4O12)2(O,OH)4·5(H2O) C 2/m 2/m

VIII/E.07-130 Paralabuntsovite-Mg! Na8K8Mg8Ti16(Si4O12)8(O,OH)16·n(H2O) I2/m 2/m

VIII/E.07-140 Labuntsovite-Mg! Na4K4(Ba,K)(Mg,Fe)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m

VIII/E.07-150 Labuntsovite-Fe! Na4K4(Ba,K)2(Fe,Mg,Mn)1xTi8(Si4O12)4(O,OH)8·10(H2O) C 2/m 2/m

VIII/E.07-155 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

VIII/E.07-170 Parakuzmenkoite-Fe! (K,Ba)2Fe(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) C 2/m 2/m

VIII/E.07-180 Organovaite-Zn! K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) C 2/m 2/m

VIII/E.07-190 Organovaite-Mn! K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O) Cm m

VIII/E.07-200 Gutkovaite-Mn! CaK2Mn(Ti,Nb)4(Si4O12)2(O,OH)4·5(H2O) Cm m

VIII/E.07-205 Neskevaaraite-Fe! NaK3Fe(Ti,Nb)4(Si4O12)2(O,OH)4·6(H2O) Cm m

VIII/E.07-210 Alsakharovite-Zn! NaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) Cm m

VIII/E.07-220 Lepkhenelmite-Zn! Ba2Zn(Ti,Nb)4(Si4O12)2(O,OH)4·7(H2O) Cm 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 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (MinSocAm) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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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: 60.1.3e.1 Strunz No: VIII/E.07-155
Locality:

Notes: