Barytolamprophyllite Mineral Data

General Barytolamprophyllite Information

Chemical Formula:

Ba2Na3(Fe+++,Ti)3(Si2O7)2(O,OH,F)4

Composition:

Molecular Weight = 807.31 gm

Potassium 2.95 % K 3.56 % K₂O

Barium 14.97 % Ba 16.71 % BaO

Sodium 5.95 % Na 8.02 % Na₂O

Strontium 3.58 % Sr 4.24 % SrO

Calcium 0.65 % Ca 0.90 % CaO

Magnesium 0.15 % Mg 0.25 % MgO

Titanium 17.26 % Ti 28.79 % TiO₂

Manganese 1.91 % Mn 2.46 % MnO

Niobium 0.12 % Nb 0.16 % Nb₂O₅

Aluminum 0.10 % Al 0.19 % Al₂O₃

Iron 2.42 % Fe

Silicon 13.92 % Si 29.77 % SiO₂

Hydrogen 0.09 % H 0.78 % H₂O

Oxygen 34.23 % O

Fluorine 1.72 % F 1.72 % F

- % F -0.72 % -O=F₂

______ ______

100.00 % 97.33 % = TOTAL OXIDE

Empirical Formula:

Ba_0.88K_0.61Sr_0.33Ca_0.05Na_2.09Fe⁰⁺_0.3Mn²⁺_0.28Ca_0.08Mg_0.05Ti_2.91Fe³⁺_0.05Al_0.03Nb_0.01 (Si₂O₇)₂O₂F_0.73OH_0.7O_0.57

Environment:

Alkalic rocks.

IMA Status:

Approved IMA 1965

Locality:

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

Name Origin:

Named for the composition and similarity to lamprophyllite.

Name Pronunciation:

Barytolamprophyllite + Pronunciation

Synonym:

ICSD 39868

PDF 34-313

Barytolamprophyllite Image

Images:

Barytolamprophyllite Lamprophyllite

Comments: Brownish-yellow barytolamprophyllite on dark green lamprophyllite.
Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Barytolamprophyllite Crystallography

Axial Ratios:

a:b:c =2.7959:1:0.7603

Cell Dimensions:

a = 19.8971, b = 7.1165, c = 5.4108, Z = 2; beta = 96.676° V = 760.96 Den(Calc)= 3.52

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/I_o): 2.85(1), 1.51(0.9), 2.19(0.9),

Physical Properties of Barytolamprophyllite

Cleavage:

{100} Perfect, {011} Good, {010} Poor

Color:

Golden brown, Dark brown.

Density:

3.62 - 3.66, Average = 3.64

Diaphaneity:

Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Flakes - Flat, thin crystals or aggregates.

Habit:

Stellate - Occurs as spherical, radial aggregates radiating from a "star" like point.

Hardness:

2-3 - Gypsum-Calcite

Luster:

Vitreous (Glassy)

Streak:

light brown

Optical Properties of Barytolamprophyllite

Gladstone-Dale:

CI meas= 0.125 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.095 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2153,KPDmeas= 0.2082,KC= 0.2379
Ncalc = 1.84 - 1.87

Optical Data:

Biaxial (+), a=1.742-1.743, b=1.754, g=1.776-1.778, bire=0.0340-0.0350, 2V(Calc)=70-74, 2V(Meas)=29-30. Dispersion r > v.

Pleochroism (x):

light yellow.

Pleochroism (y):

brownish yellow.

Pleochroism (z):

brown.

Calculated Properties of Barytolamprophyllite

Electron Density:

Bulk Density (Electron Density)=3.33 gm/cc
note: Specific Gravity of Barytolamprophyllite =3.52 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_{Barytolamprophyllite}= 72.79 barns/electron
U=PE_{Barytolamprophyllite} x r_electron= 242.44 barns/cc.

Radioactivity:

GRapi = 40.33 (Gamma Ray American Petroleum Institute Units)
Concentration of Barytolamprophyllite per GRapi unit = 2.48 (%)

Estimated Radioactivity from Barytolamprophyllite - barely detectable

Barytolamprophyllite Classification

Dana Class:

56.02.06c.01 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O

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

(56.02.06c)Seidozerite - Lamprophyllite group (Lamprophyllite subgroup)

56.02.06c.01 Barytolamprophyllite Ba2Na3(Fe,Ti)3(Si2O7)2(O,OH,F)4 C 2/m 2/m

56.02.06c.02 Delindeite Ba2(Na,K,[])3(Ti,Fe)[Ti2(O,OH)4Si4O14](H2O,OH)2 A2/m 2/m

56.02.06c.03 Ericssonite BaMn2FeO[Si2O7](OH) C 2/m 2/m

56.02.06c.04 Lamprophyllite Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2 C 2/m 2/m

56.02.06c.05 Orthoericssonite BaMn2(FeO)Si2O7(OH) Pmmn 2/m 2/m 2/m

56.02.06c.06 Andremeyerite BaFe(Fe,Mn,Mg)Si2O7 P 2₁/c 2/m

56.02.06c.07 Eveslogite! (Ca,K,Na,Sr,Ba)48[(Ti,Nb,Fe,Mn)12(OH)12Si48O144](F,OH,Cl)14 P 2/m 2/m

56.02.06c.08 Nabalamprophyllite! Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2} P 2/m 2/m

Strunz Class:

09.BE.25 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BE -Si2O7 groups with additional anions;

09.BE.25 Barytolamprophyllite Ba2Na3(Fe,Ti)3(Si2O7)2(O,OH,F)4 C 2/m 2/m

09.BE.25 Ericssonite BaMn2FeO[Si2O7](OH) C 2/m 2/m

09.BE.25 Lamprophyllite Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2 C 2/m 2/m

09.BE.25 Orthoericssonite BaMn2(FeO)Si2O7(OH) Pmmn 2/m 2/m 2/m

09.BE.25 Seidozerite (Na,Ca)2(Zr,Ti,Mn)2Si2O7(O,F)2 P 2/c 2/m

09.BE.25 Nabalamprophyllite! Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2} P 2/m 2/m

09.BE.25 Grenmarite! (Zr,Mn)2(Zr,Ti)(Mn,Na)(Na,Ca)4(Si2O7)2(O,F)4 P 2/c 2/m

Other Barytolamprophyllite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8, AmMin, v94:405) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Barytolamprophyllite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

Search for Barytolamprophyllite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Barytolamprophyllite :

Ask about Barytolamprophyllite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Barytolamprophyllite Specimen Label here :

Barytolamprophyllite

Ba2Na3(Fe+++,Ti)3(Si2O7)2(O,OH,F)4
Dana No: 56.02.06c.01 Strunz No: 09.BE.25
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.