Lavenite Mineral Data + 
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- 56.2.4.1 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m
- 56.2.4.2 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m
- 56.2.4.3 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m
- 56.2.4.4 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m
- 56.2.4.5 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m
- 56.2.4.6 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m
- 56.2.4.7 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1
- 56.2.4.8 Rosenbuschite (Ca,Na)3(Zr,Ti)Si2O8F P1 1
- 56.2.4.9 Hainite Na4Ca8(Ti,Zr,Mn,Fe)3Si8O28F8 P1 1
- 56.2.4.10 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m
- 56.2.4.11 Jennite Ca9Si6O18(OH)6·8H2O P1 1
- 56.2.4.12 Komarovite (Ca,Mn)2(Nb,Ti)2Si2O7(O,F)2·3.5(H2O) Unk Ortho
- 56.2.4.13 Na-komarovite? Na6CaNb6[Si4O12F2·4(H2O) C mmm 2/m 2/m 2/m
- 56.2.4.14 Suolunite Ca2Si2O5(OH)2·(H2O) F dd2 mm2
- 56.2.4.15 Mongolite Ca4Nb6Si5O24(OH)10·5(H2O) Unk Tetra
- 56.2.4.16 Kristiansenite! Ca2ScSn(Si2O7)(Si2O6OH) C1 1
- 56.2.4.17 Kochite! Na2(Na,Ca)4Ca4(Mn,Ca)2Zr2Ti2(Si2O7)4(O,F)4F4 P1 1
- VIII/C.11-05 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m
- VIII/C.11-10 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m
- VIII/C.11-12 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m
- VIII/C.11-15 Normandite! NaCa(Mn,Fe)(Ti,Nb,Zr)Si2O7(O,F)2 P 21/a 2/m
- VIII/C.11-20 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m
- VIII/C.11-25 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m
- VIII/C.11-30 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m
- VIII/C.11-40 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m
- VIII/C.11-50 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1
General Lavenite Information |
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 Chemical Formula: |
(Na,Ca)2(Mn,Fe++)(Zr,Ti,Nb)Si2O7(O,OH,F) | ||
| 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 | |||
| Empirical Formula: |
Na1.6Ca0.4Mn2+0.3Ca0.2Fe2+0.2Zr0.9Ti0.2Nb0.1(Si2O7)O0.6(OH)0.3F0.1 | ||
| Environment: |
In alkalic rocks and related pegmatites. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1885 | ||
| Locality: |
In Norway, on Laven and the Aro Islands. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
| Synonym: |
ICSD 100722 | ||
| PDF 14-606 | |||
Lavenite Image | |||
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Images:
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Lavenite Crystallography |
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| Axial Ratios: |
a:b:c =1.0646:1:0.7212 | ||
| Cell Dimensions: |
a = 10.54, b = 9.9, c = 7.14, Z = 4; beta = 108.2° V = 707.76 Den(Calc)= 3.51 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.89(1), 2.81(0.9), 3.22(0.5), | ||
Physical Properties of Lavenite |
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| Cleavage: |
[100] Good | ||
| Color: |
Colorless, Light yellow, Dark yellow, Brown, Brownish red. | ||
| Density: |
3.51 - 3.55, Average = 3.53 | ||
| Diaphaniety: |
Translucent | ||
| Fracture: |
Brittle - Uneven - Very brittle fracture producing uneven fragments. | ||
| Habit: |
Pistolitic - > 3mm rounded spherical grains. | ||
| Habit: |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) | ||
| Habit: |
Tabular - Form dimensions are thin in one direction. | ||
| Hardness: |
6 - Orthoclase | ||
| Luster: |
Vitreous - Dull | ||
| Streak: |
yellow | ||
Optical Properties of Lavenite |
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| 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 |
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| 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. | ||
| Pleochroism (x): |
colorless or pale yellow. | ||
| Pleochroism (y): |
colorless or pale greenish. | ||
| Pleochroism (z): |
very pale yellow or orange to brown yellow. | ||
Calculated Properties of Lavenite |
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| Electron Density: |
relectron=3.36 gm/cc |
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| Fermion Index |
Fermion Index = 0.03581 Boson Index = 0.96419 |
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| Photoelectric: |
PELavenite = 37.13 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Lavenite is Not Radioactive |
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Lavenite Classification |
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| Dana Class: |
56.2.4.4 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O | ||
| (56.2)with cations in [4] and/or >[4] coordination | |||
| (56.2.4)Cuspidine - Wohlerite group | |||
| Strunz Class: |
VIII/C.11-20 VIII - Silicates | ||
| VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F] | |||
| VIII/C.11 - Wöhlerite - Lavenite series | |||
Other Lavenite Information |
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| References: |
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2) | ||
| See Also: |
Links to other databases for Lavenite : 1 - Alkali-Nuts(English) 2 -Am. Min. Crystal Structure Database 3 -Athena 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (MinSocAm) 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 - Minerals of Wisconsin 14 -QUT Mineral Atlas 15 - WWW-MINCRYST 16 -École des Mines de Paris Search for Lavenite using: Visit our Advertisers for Lavenite : Translate Lavenite Mineral Data : Ask about Lavenite here : Print or Cut-and-Paste your Lavenite Specimen Label here :
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