Mineralogy Database

Lavenite Mineral Data

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General Lavenite Information

Help on Chemical  Formula: Chemical Formula: (Na,Ca)2(Mn,Fe++)(Zr,Ti,Nb)Si2O7(O,OH,F)
Help on Composition: Composition: Molecular Weight = 374.22 gm
   Sodium      9.83 %  Na   13.25 % Na2O
   Calcium     6.43 %  Ca    8.99 % CaO
   Zirconium  21.94 %  Zr   29.64 % ZrO2
   Titanium    2.56 %  Ti    4.27 % TiO2
   Manganese   4.40 %  Mn    5.69 % MnO
   Niobium     2.48 %  Nb    3.55 % Nb2O5
   Iron        2.98 %  Fe    3.84 % FeO
   Silicon    15.01 %  Si   32.11 % SiO2
   Hydrogen    0.08 %  H     0.72 % H2O
   Oxygen     33.78 %  O
   Fluorine    0.51 %  F     0.51 % F
                -   %   F    -0.21 % -O=F2    
             ______        ______ 
             100.00 %      102.35 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na1.6Ca0.4Mn2+0.3Ca0.2Fe2+0.2Zr0.9Ti0.2Nb0.1(Si2O7)O0.6(OH)0.3F0.1
Help on Environment: Environment: In alkalic rocks and related pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1885
Help on Locality: Locality: In Norway, on Laven and the Aro Islands. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Lavenite Say LAVENITE
Help on Synonym: Synonym: ICSD 100722
  PDF 14-606
 

Lavenite Image

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  Lavenite

Comments: Orange crystalline lavenite grains in pegmatite.
Location: Mount Takhtarvumchorr, Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Lavenite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0646:1:0.7212
Help on Cell Dimensions: Cell Dimensions: a = 10.54, b = 9.9, c = 7.14, Z = 4; beta = 108.2° V = 707.76 Den(Calc)= 3.51
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.89(1), 2.81(0.9), 3.22(0.5),
 

Physical Properties of Lavenite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Colorless, Light yellow, Dark yellow, Brown, Brownish red.
Help on Density: Density: 3.51 - 3.55, Average = 3.53
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Pistolitic - > 3mm rounded spherical grains.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: yellow
 

Optical Properties of Lavenite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.11 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.105 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1975,KPDmeas= 0.1964,KC= 0.2208
Ncalc = 1.77 - 1.78
Help on Optical Data: Optical Data: Biaxial (-), a=1.67, b=1.69, g=1.72, bire=0.0500, 2V(Calc)=80, 2V(Meas)=40-70. Dispersion r < v perceptible.
Help on Pleochroism (x): Pleochroism (x): colorless or pale yellow.
Help on Pleochroism (y): Pleochroism (y): colorless or pale greenish.
Help on Pleochroism (z): Pleochroism (z): very pale yellow or orange to brown yellow.
 

Calculated Properties of Lavenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.36 gm/cc
note: Specific Gravity of Lavenite =3.51 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PELavenite = 37.13 barns/electron
U=PELavenite x rElectron Density= 124.83 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lavenite is Not Radioactive
 

Lavenite Classification

Help on  Dana Class: Dana Class: 56.02.04.04 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.04)Cuspidine - Wohlerite group
 
56.02.04.01 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m
 
56.02.04.02 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m
 
56.02.04.03 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m
 
56.02.04.04 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m
 
56.02.04.05 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m
 
56.02.04.06 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m
 
56.02.04.07 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1
 
56.02.04.08 Rosenbuschite (Ca,Na)3(Zr,Ti)Si2O8F P1 1
 
56.02.04.09 Hainite Na4Ca8(Ti,Zr,Mn,Fe)3Si8O28F8 P1 1
 
56.02.04.10 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m
 
56.02.04.11 Jennite Ca9Si6O18(OH)6•8H2O P1 1
 
56.02.04.12 Komarovite (Ca,Mn)2(Nb,Ti)2Si2O7(O,F)2•3.5(H2O) Unk Ortho
 
56.02.04.13 Natrokomarovite* Na6CaNb6[Si4O12F2•4(H2O) C mmm 2/m 2/m 2/m
 
56.02.04.14 Suolunite Ca2Si2O5(OH)2•(H2O) F dd2 mm2
 
56.02.04.15 Mongolite Ca4Nb6Si5O24(OH)10•5(H2O) Unk Tetra
 
56.02.04.16 Kristiansenite! Ca2ScSn(Si2O7)(Si2O6OH) C1 1
 
56.02.04.17 Kochite! Na2(Na,Ca)4Ca4(Mn,Ca)2Zr2Ti2(Si2O7)4(O,F)4F4 P1 1
 
56.02.04.18 Marianoite! Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4 P 21 2/m
Help on  Strunz Class: Strunz Class: 09.BE.17 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
 
09.BE.17 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m
 
09.BE.17 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m
 
09.BE.17 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m
 
09.BE.17 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m
 
09.BE.17 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1
 
09.BE.17 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m
 
09.BE.17 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m
 
09.BE.17 Normandite! NaCa(Mn,Fe)(Ti,Nb,Zr)Si2O7(O,F)2 P 21/a 2/m
 
09.BE.17 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m
 
09.BE.17 Marianoite! Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4 P 21 2/m
 

Other Lavenite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Lavenite :
1 - Alkali-Nuts(English)
2 - Am. Min. Crystal Structure Database
3 - Athena
4 - EUROmin Project
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

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

Lavenite

(Na,Ca)2(Mn,Fe++)(Zr,Ti,Nb)Si2O7(O,OH,F)
Dana No: 56.02.04.04 Strunz No: 09.BE.17
Locality:

 

Notes:

 

 
   
 


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