Labuntsovite-Fe Mineral Data
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 % K2 O
Barium 7.38 % Ba 8.24 % BaO
Sodium 4.09 % Na 5.51 % Na2 O
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 % Nb2 O5
Iron 1.85 % Fe 2.38 % FeO
Silicon 18.58 % Si 39.74 % SiO2
Hydrogen 0.93 % H 8.34 % H2 O
Oxygen 43.59 % O
______ ______
100.00 % 100.07 % = TOTAL OXIDE
Empirical Formula:
Na4.3 K4.3 Ba1.3 (H2 O)2.2 Fe2+ 0.8 Mg0.2 Mn2+ 0.1 Ti7.8 Nb0.2 Si16 O53.4 (OH)2.6 �7.7(H2 O)
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 - Prismatic H-M Symbol (2/m) Space Group: C 2/m
X Ray Diffraction:
By Intensity(I/Io ): 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),
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:
PELabuntsovite-Fe = 36.07 barns/electronU=PELabuntsovite-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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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
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