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Lamprophyllite Mineral Data

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General Lamprophyllite Information

Help on Chemical  Formula: Chemical Formula: Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Na2Sr2BaTi3Si4O14(OH)2F
Help on Environment: Environment: In Russia, in the Lovozero and Khibiny massifs, Kola Peninsula; in the Konder, Inagli, and Yllymakh massifs, Yakutia.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1894
Help on Locality: Locality: In all rock types and most pegmatites of a differentiated alkalic massif Lovozero massif, Russia). Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, lampros - "luster" and fyllon - "leaf" in allusion to the lusterous cleavage.
Help on Name Pronunciation: Name Pronunciation: Lamprophyllite + Pronunciation Say LAMPROPHYLLITE
Help on Synonym: Synonym: ICSD 39662
  PDF 17-751

Lamprophyllite Image

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

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  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

Lamprophyllite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.7988:1:0.7648
Help on Cell Dimensions: Cell Dimensions: a = 19.76, b = 7.06, c = 5.4, Z = 2; beta = 96.5° V = 748.49 Den(Calc)= 3.96
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): 2.773(1), 3.43(0.55), 2.13(0.45),

Physical Properties of Lamprophyllite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Yellow, Brown.
Help on Density: Density: 3.44
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Habit: Habit: Stellate - Occurs as spherical, radial aggregates radiating from a "star" like point.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: brownish white

Optical Properties of Lamprophyllite

Help on Gladstone-Dale: 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
Help on Optical Data: 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

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.20 gm/cc
note: Specific Gravity of Lamprophyllite =3.44 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PELamprophyllite = 91.97 barns/electron
U=PELamprophyllite x rElectron Density= 294.54 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lamprophyllite is Not Radioactive

Lamprophyllite Classification

Help on  Dana Class: 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
Help on  Strunz Class: 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

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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

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Dana No: 56.02.06c.04 Strunz No: 09.BE.25





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