Nabalamprophyllite Mineral Data

Nabalamprophyllite Mineral Data

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General Nabalamprophyllite Information

Chemical Formula:

Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2}

Composition:

Molecular Weight = 810.56 gm

Potassium 0.77 % K 0.93 % K₂O

Barium 21.86 % Ba 24.40 % BaO

Sodium 8.37 % Na 11.28 % Na₂O

Strontium 0.54 % Sr 0.64 % SrO

Calcium 0.25 % Ca 0.35 % CaO

Magnesium 0.21 % Mg 0.35 % MgO

Titanium 16.84 % Ti 28.09 % TiO₂

Manganese 0.88 % Mn 1.14 % MnO

Aluminum 0.23 % Al 0.44 % Al₂O₃

Iron 0.55 % Fe 0.71 % FeO

Silicon 13.58 % Si 29.06 % SiO₂

Hydrogen 0.21 % H 1.84 % H₂O

Oxygen 34.52 % O

Fluorine 1.20 % F 1.20 % F

- % F -0.50 % -O=F₂

______ ______

100.00 % 99.91 % = TOTAL OXIDE

Empirical Formula:

Ba_1.29Mn²⁺_0.13Na_0.11Sr_0.05Ca_0.05Na_2.84K_0.16Ti_0.85Fe²⁺_0.08Mg_0.07Ti₂O₂Si_3.92Al_0.07 O_13.83(OH)_1.66F_0.51

Environment:

Found in a peralkaline pegmatite. (lamprophyllite group; structure).

IMA Status:

Approved IMA 2004, Dana # Added

Locality:

Inagli alkaline-ultrabasic massif, Yakutia, Russia. Also in the Kovdor alkaline-ultrabasic massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named as the Na & Ba dominant analogue of lamprophyllite.

Synonym:

IMA2001-060

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Nabalamprophyllite Crystallography

Axial Ratios:

a:b:c =2.8141:1:0.7709

Cell Dimensions:

a = 19.741, b = 7.015, c = 5.408, Z = 2; beta = 96.67° V = 743.85 Den(Calc)= 3.62

Crystal System:

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

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

By Intensity(I/I_o): 2.797(1)(221), 9.87(0.96)(200), 3.45(0.9)(311,510),3.275(0.78)(600), 3.75(0.65)(311), 2.61(0.43)(421,710), 3.04(0.41)(511), 2.14

Physical Properties of Nabalamprophyllite

Cleavage:

[100] Perfect

Color:

Brown, Yellowish brown.

Density:

3.58

Diaphaniety:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

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

Hardness:

3 - Calcite

Luster:

Vitreous - Adamantine

Streak:

white

Optical Properties of Nabalamprophyllite

Gladstone-Dale:

CI meas= 0.102 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.112 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2122,KPDmeas= 0.2145,KC= 0.239

Optical Data:

Biaxial (+), a=1.75, b=1.755, g=1.799, bire=0.0490, 2V(Calc)=38, 2V(Meas)=40. Dispersion r > v strong.

Calculated Properties of Nabalamprophyllite

Electron Density:

r_electron=3.37 gm/cc
note: r_{Nabalamprophyllite}=3.58 gm/cc.

Fermion Index

Fermion Index = 0.06793
Boson Index = 0.93207

Photoelectric:

PE_{Nabalamprophyllite}= 97.75 barns/electron
U=PE_{Nabalamprophyllite} x r_electron= 329.38 barns/cc.

Radioactivity:

GRapi = 10.49 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Nabalamprophyllite - barely detectable

Nabalamprophyllite Classification

Dana Class:

56.2.6c.8 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O

(56.2)with cations in [4] and/or >[4] coordination

(56.2.6c)Seidozerite - Lamprophyllite group (Lamprophyllite subgroup)

56.2.6c.1 Barytolamprophyllite Ba2Na3(Fe,Ti)3(Si2O7)2(O,OH,F)4 C 2/m 2/m

56.2.6c.2 Delindeite Ba2(Na,K,[])3(Ti,Fe)[Ti2(O,OH)4Si4O14](H2O,OH)2 A2/m 2/m

56.2.6c.3 Ericssonite BaMn2FeO[Si2O7](OH) C 2/m 2/m

56.2.6c.4 Lamprophyllite Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2 C 2/m 2/m

56.2.6c.5 Orthoericssonite BaMn2(FeO)Si2O7(OH) Pmmn 2/m 2/m 2/m

56.2.6c.6 Andremeyerite BaFe(Fe,Mn,Mg)Si2O7 P 2₁/c 2/m

56.2.6c.7 Eveslogite! (Ca,K,Na,Sr,Ba)48[(Ti,Nb,Fe,Mn)12(OH)12Si48O144](F,OH,Cl)14 P 2/m 2/m

56.2.6c.8 Nabalamprophyllite ! Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2} P 2/m 2/m

Strunz Class:

VIII/C.13-15 VIII - Silicates

VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F]

VIII/C.13 - Rosenbuschite - Lamprophyllite - Hejtmanite series

VIII/C.13-05 Grenmarite! (Zr,Mn)2(Zr,Ti)(Mn,Na)(Na,Ca)4(Si2O7)2(O,F)4 P 2/c 2/m

VIII/C.13-10 Seidozerite (Na,Ca)2(Zr,Ti,Mn)2Si2O7(O,F)2 P 2/c 2/m

VIII/C.13-15 Nabalamprophyllite Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2} P 2/m 2/m

VIII/C.13-20 Lamprophyllite Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2 C 2/m 2/m

VIII/C.13-25 Kukisvumite Na6ZnTi4Si8O28·4(H2O) Pccn 2/m 2/m 2/m

VIII/C.13-27 Shkatulkalite! Na10MnTi3Nb3(Si2O7)6(OH)2F·12(H2O) P 2,Pm,P 2/m Mono

VIII/C.13-30 Barytolamprophyllite Ba2Na3(Fe,Ti)3(Si2O7)2(O,OH,F)4 C 2/m 2/m

VIII/C.13-40 Ericssonite BaMn2FeO[Si2O7](OH) C 2/m 2/m

VIII/C.13-50 Orthoericssonite BaMn2(FeO)Si2O7(OH) Pmmn 2/m 2/m 2/m

Other Nabalamprophyllite Information

References:

NAME( CanMin, 42:1919) PHYS. PROP.(CanMin, 42:1919) OPTIC PROP.(CanMin, 42:1919)

See Also:

Links to other databases for Nabalamprophyllite :
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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Print or Cut-and-Paste your Nabalamprophyllite Specimen Label here :

Nabalamprophyllite

Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2}
Dana No: 56.2.6c.8 Strunz No: VIII/C.13-15
Locality:

Notes: