Lemmleinite-Ba Mineral Data

Lemmleinite-Ba Mineral Data

General Lemmleinite-Ba Information

Chemical Formula:

Na2K2Ba1-xTi4(Si4O12)2(O,OH)4·5(H2O)

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

Empirical Formula:

Na_4.3K_3.7Ba_2.1Mn²⁺_0.6Mg_0.2Fe²⁺_0.1Ti_7.9Nb_0.1(Si₄O₁₂)₄O_6.4(OH)_1.6·10.5(H₂O)

Environment:

Alkaline pegmatites. Labuntsovite group, structure

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

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

Name Origin:

Named as the Ba-dominant member of the lemmleinite subgroup.

Synonym:

IMA1998-052a

Lemmleinite-Ba Image

Images:

Lemmleinite-Ba

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

Axial Ratios:

a:b:c =1.0335:1:0.5646

Cell Dimensions:

a = 14.216, b = 13.755, c = 7.767, Z = 1; beta = 116.7° V = 1,356.82 Den(Calc)= 3.06

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): 3.16(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),

Crystal Structure:

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Armbruster T , Krivovichev S V , Weber T , Gnos E , Organova N N , Yakovenchuk V N , American Mineralogist , 89 (2004) p.1655-1666, Origin of diffuse superstructure reflections in labuntsovite-group minerals, Sample A2 at T = -160 deg C

View Additional jPOWD Structure files for Lemmleinite-Ba
[1] [2] [3] [4] [5]

Physical Properties of Lemmleinite-Ba

Cleavage:

[???] Imperfect

Color:

Bright orange, Reddish orange, Light coffee brown.

Density:

3.03

Diaphaniety:

Transparent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

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

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Lemmleinite-Ba

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

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

Electron Density:

r_electron=2.94 gm/cc
note: r_{Lemmleinite-Ba}=3.03 gm/cc.

Fermion Index

Fermion Index = 0.04899
Boson Index = 0.95101

Photoelectric:

PE_{Lemmleinite-Ba}= 52.53 barns/electron
U=PE_{Lemmleinite-Ba} x r_electron= 154.34 barns/cc.

Radioactivity:

GRapi = 81.00 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Lemmleinite-Ba - barely detectable

Lemmleinite-Ba Classification

Dana Class:

60.1.3d.2 (60)Cyclosilicate Four-Membered Rings

(60.1)as Titanosilicates

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

60.1.3d.1 Lemmleinite-K! NaK2(Ti,Nb)2Si4O12(O,OH)2·2(H2O) C 2/m 2/m

60.1.3d.2 Lemmleinite-Ba ! Na2K2Ba1-xTi4(Si4O12)2(O,OH)4·5(H2O) C 2/m 2/m

Strunz Class:

VIII/E.07-110 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 Lemmleinite-Ba 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 Lemmleinite-Ba :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Lemmleinite-Ba

Na2K2Ba1-xTi4(Si4O12)2(O,OH)4·5(H2O)
Dana No: 60.1.3d.2 Strunz No: VIII/E.07-110
Locality:

Notes: