Lamprophyllite Mineral Data

[Newest Minerals] [Equipment] [Analytical Services] [About Us] [Mineral Gallery] [eBay Store]
See Also: [Diamond Crystals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Rare Minerals, Meteorites, Equipment and Analytical Services
Excalibur Mineral Company, World leaders in the supply of rare species
Serving the scientific and collector communities since 1974

General Lamprophyllite Information

Chemical Formula:

Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2

Composition:

Molecular Weight = 891.53 gm

Barium 15.40 % Ba 17.20 % BaO

Sodium 5.16 % Na 6.95 % Na₂O

Strontium 19.66 % Sr 23.25 % SrO

Titanium 16.11 % Ti 26.88 % TiO₂

Silicon 12.60 % Si 26.96 % SiO₂

Hydrogen 0.23 % H 2.02 % H₂O

Oxygen 28.71 % O

Fluorine 2.13 % F 2.13 % F

- % F -0.90 % -O=F₂

______ ______

100.00 % 104.49 % = TOTAL OXIDE

Empirical Formula:

Na₂Sr₂BaTi₃Si₄O₁₄(OH)₂F

Environment:

In Russia, in the Lovozero and Khibiny massifs, Kola Peninsula; in the Konder, Inagli, and Yllymakh massifs, Yakutia.

IMA Status:

Valid Species (Pre-IMA) 1894

Locality:

In all rock types and most pegmatites of a differentiated alkalic massif Lovozero massif, Russia). Link to MinDat.org Location Data.

Name Origin:

From the Greek, lampros - "luster" and fyllon - "leaf" in allusion to the lusterous cleavage.

Name Pronunciation:

Lamprophyllite + Pronunciation

Synonym:

ICSD 39662

PDF 17-751

Lamprophyllite Image

Images:

Lamprophyllite

Comments: Deep-red, acicular spray of lamprophyllite in matrix.
Location: Kola Peninsula, Russia. Scale: Crystal size 1.5 cm.
© Tom Loomis / Dakota Matrix

Images:

Lamprophyllite Barytolamprophyllite

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

Lamprophyllite Crystallography

Axial Ratios:

a:b:c =2.7988:1:0.7648

Cell Dimensions:

a = 19.76, b = 7.06, c = 5.4, Z = 2; beta = 96.5° V = 748.49 Den(Calc)= 3.96

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): 2.773(1), 3.43(0.55), 2.13(0.45),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Krivovichev S V , Armbruster T , Yakovenchuk V N , Pakhomovsky Y A , Men shikov Y P , European Journal of Mineralogy , 15 (2003) p.711-718, Crystal structures of lamprophyllite-2M and lamprophyllite-2O, from the Lovozero alkaline massif, Kola peninsula, Russia, Note: displacement factors have been altered by Krivovichev, November 2003, Locality: Lovozero alkaline massif, Kola peninsula, Russia

Physical Properties of Lamprophyllite

Cleavage:

{100} Good

Color:

Yellow, Brown.

Density:

3.44

Diaphaneity:

Translucent

Fracture:

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

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Habit:

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

Hardness:

2.5 - Finger Nail

Luster:

Vitreous - Pearly

Streak:

brownish white

Optical Properties of Lamprophyllite

Gladstone-Dale:

CI meas= 0.074 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.196 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1918,KPDmeas= 0.2208,KC= 0.2385
Ncalc = 1.82 - 1.94

Optical Data:

Biaxial (+), a=1.746, b=1.754, g=1.779, bire=0.0330, 2V(Calc)=60, 2V(Meas)=21-43.

Calculated Properties of Lamprophyllite

Electron Density:

Bulk Density (Electron Density)=3.20 gm/cc
note: Specific Gravity of Lamprophyllite =3.44 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_{Lamprophyllite}= 91.97 barns/electron
U=PE_{Lamprophyllite} x rElectron Density= 294.54 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lamprophyllite is Not Radioactive

Lamprophyllite Classification

Dana Class:

56.02.06c.04 (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 Lamprophyllite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

Search for Lamprophyllite using:

[ALTAVISTA] [AOL] [bing] [GeoScienceWorld] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Lamprophyllite :

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Lapis Mineral Journal

Mineral News

UV Tools

Wrights Rock Shop

Translate Lamprophyllite Mineral Data :

Ask about Lamprophyllite 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 Lamprophyllite Specimen Label here :

Lamprophyllite

Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2
Dana No: 56.02.06c.04 Strunz No: 09.BE.25
Locality:

Notes: