Labuntsovite-Fe Mineral Data

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General Labuntsovite-Fe Information

Chemical Formula:

Na4K4(Ba,K)2(Fe,Mg,Mn)1+xTi8(Si4O12)4(O,OH)8•10(H2O)

Composition:

Molecular Weight = 2,418.89 gm

Potassium 6.95 % K 8.37 % K₂O

Barium 7.38 % Ba 8.24 % BaO

Sodium 4.09 % Na 5.51 % Na₂O

Magnesium 0.20 % Mg 0.33 % MgO

Titanium 15.44 % Ti 25.76 % TiO₂

Manganese 0.23 % Mn 0.29 % MnO

Niobium 0.77 % Nb 1.10 % Nb₂O₅

Iron 1.85 % Fe 2.38 % FeO

Silicon 18.58 % Si 39.74 % SiO₂

Hydrogen 0.93 % H 8.34 % H₂O

Oxygen 43.59 % O

______ ______

100.00 % 100.07 % = TOTAL OXIDE

Empirical Formula:

Na_4.3K_4.3Ba_1.3(H₂O)_2.2Fe²⁺_0.8Mg_0.2Mn²⁺_0.1Ti_7.8Nb_0.2Si₁₆O_53.4(OH)_2.6·7.7(H₂O)

Environment:

Occurs in K-feldspar-natrolite-calcite veinlets in hydrothermally altered urtite. Labuntsovite group, structure

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Mount Kukisvumchorr, Khibiny alkaline massif, Kola Peninsula. Russia. Link to MinDat.org Location Data.

Name Origin:

Named as the Fe dominant member of the labuntsovite subgroup.

Name Pronunciation:

Labuntsovite-Fe + Pronunciation

Synonym:

IMA1998-051

Labuntsovite-Fe Image

Images:

Labuntsovite-Fe

Comments: Orange labuntsovite-Fe in matrix.
Location: Desourdy Quarry, Mont St. Hilaire, Rouville County, Quebec, Canad. Scale: See Image.
© Rruff Database

Labuntsovite-Fe Crystallography

Axial Ratios:

a:b:c =1.0332:1:0.5639

Cell Dimensions:

a = 14.249, b = 13.791, c = 7.777, Z = 1; beta = 116.82° V = 1,363.85 Den(Calc)= 2.94

Crystal System:

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

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

By Intensity(I/I_o): 3.169(1)(400,402,421), 2.585(0.58)(241,242), 6.95(0.56)(001),3.032(0.53)(240,241), 3.1(0.53)(022,041), 6.35(0.34),

Crystal Structure:

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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: II

Physical Properties of Labuntsovite-Fe

Color:

Orange.

Density:

2.94

Diaphaneity:

Translucent to transparent

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Optical Properties of Labuntsovite-Fe

Gladstone-Dale:

CI meas= 0.027 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2514,KPDmeas= 0.2514,KC= 0.2583
Ncalc = 1.76

Optical Data:

Biaxial (+), a=1.686, b=1.696, g=1.835, bire=0.1490

Calculated Properties of Labuntsovite-Fe

Electron Density:

Bulk Density (Electron Density)=2.87 gm/cc
note: Specific Gravity of Labuntsovite-Fe =2.94 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_{Labuntsovite-Fe}= 36.07 barns/electron
U=PE_{Labuntsovite-Fe} x r_electron= 103.53 barns/cc.

Radioactivity:

GRapi = 97.92 (Gamma Ray American Petroleum Institute Units)
Concentration of Labuntsovite-Fe per GRapi unit = 1.02 (%)

Estimated Radioactivity from Labuntsovite-Fe - barely detectable

Labuntsovite-Fe Classification

Dana Class:

60.01.03e.03 (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-Fe Information

References:

NAME( AmMin, v 87, p 1733) PHYS. PROP.(AmMin, v 87, p 1733) OPTIC PROP.(AmMin, v 87, p 1733)

See Also:

Links to other databases for Labuntsovite-Fe :
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-Fe Specimen Label here :

Labuntsovite-Fe

Na4K4(Ba,K)2(Fe,Mg,Mn)1+xTi8(Si4O12)4(O,OH)8•10(H2O)
Dana No: 60.01.03e.03 Strunz No: 09.CE.30e
Locality:

Notes: