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Lemmleinite-Ba Mineral Data

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General Lemmleinite-Ba Information

Help on Chemical  Formula: Chemical Formula: Na2K2Ba1-xTi4(Si4O12)2(O,OH)4•5(H2O)
Help on Composition: Composition: Molecular Weight = 2,498.97 gm
   Potassium   5.79 %  K     6.97 % K2O
   Barium     11.54 %  Ba   12.88 % BaO
   Sodium      3.96 %  Na    5.33 % Na2O
   Magnesium   0.19 %  Mg    0.32 % MgO
   Titanium   15.14 %  Ti   25.25 % TiO2
   Manganese   1.32 %  Mn    1.70 % MnO
   Niobium     0.37 %  Nb    0.53 % Nb2O5
   Iron        0.22 %  Fe    0.29 % FeO
   Silicon    17.98 %  Si   38.47 % SiO2
   Hydrogen    0.91 %  H     8.15 % H2O
   Oxygen     42.58 %  O
             ______        ______ 
             100.00 %       99.90 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na4.3K3.7Ba2.1Mn2+0.6Mg0.2Fe2+0.1Ti7.9Nb0.1(Si4O12)4O6.4(OH)1.6�10.5(H2O)
Help on Environment: Environment: Alkaline pegmatites. Labuntsovite group, structure
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: Kukisvumchorr Mt, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Ba-dominant member of the lemmleinite subgroup.
Help on Synonym: Synonym: IMA1998-052a

Lemmleinite-Ba Image

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Comments: Orange-brown pyramidal crystals of lemmleinite-Ba with greenish aegirine crystals.
Location: Karnasurt Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Lemmleinite-Ba Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0335:1:0.5646
Help on Cell Dimensions: Cell Dimensions: a = 14.216, b = 13.755, c = 7.767, Z = 1; beta = 116.7° V = 1,356.82 Den(Calc)= 3.06
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): 3.16(1)(421,402), 6.31(0.28)(201), 6.93(0.26)(001), 2.577(0.25)(203,241), 3.02(0.25)(240), 3.55(0.24)(401), 3.09(0.24)(022,041),

Physical Properties of Lemmleinite-Ba

Help on Cleavage: Cleavage: {???} Imperfect
Help on Color: Color: Bright orange, Reddish orange, Light coffee brown.
Help on Density: Density: 3.03
Help on Diaphaneity: Diaphaneity: Transparent
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 Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Lemmleinite-Ba

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.047 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.057 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2389,KPDmeas= 0.2413,KC= 0.2532
Ncalc = 1.77
Help on Optical Data: Optical Data: Biaxial (+), a=1.683, b=1.69, g=1.82, bire=0.1370, 2V(Calc)=28, 2V(Meas)=37. Dispersion r > v medium.

Calculated Properties of Lemmleinite-Ba

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.94 gm/cc
note: Specific Gravity of Lemmleinite-Ba =3.03 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PELemmleinite-Ba = 52.53 barns/electron
U=PELemmleinite-Ba x relectron= 154.34 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 81.00 (Gamma Ray American Petroleum Institute Units)
Concentration of Lemmleinite-Ba per GRapi unit = 1.23 (%)

Estimated Radioactivity from Lemmleinite-Ba - barely detectable


Lemmleinite-Ba Classification

Help on  Dana Class: Dana Class: 60.01.03d.02 (60)Cyclosilicate Four-Membered Rings
  (60.01)as Titanosilicates
  (60.01.03d)Labuntsovite Group (Lemmleinite subgroup Monoclinic [C2/m])
60.01.03d.01 Lemmleinite-K! NaK2(Ti,Nb)2Si4O12(O,OH)2•2(H2O) C 2/m 2/m
60.01.03d.02 Lemmleinite-Ba! Na2K2Ba1-xTi4(Si4O12)2(O,OH)4•5(H2O) C 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.CE.30d 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),
09.CE.30d Lemmleinite-Ba! Na2K2Ba1-xTi4(Si4O12)2(O,OH)4•5(H2O) C 2/m 2/m
09.CE.30d Lemmleinite-K! NaK2(Ti,Nb)2Si4O12(O,OH)2•2(H2O) C 2/m 2/m

Other Lemmleinite-Ba 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 Lemmleinite-Ba :
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: 60.01.03d.02 Strunz No: 09.CE.30d





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