Pronunciation Guide 
General Information |
|
 Chemical Formula: |
(Na,Ca)2(Mn,Fe++)(Zr,Ti)Si2O7(O,OH,F) |
Classification |
|
| 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/CX.00-00 VIII - Silicates |
| VIII/CX - Unclassified Strunz Sorosilicates | |
| VIII/CX.00 - Unknown | |
Crystallography |
|
| Axial Ratios: |
a:b:c =1.0646:1:0.7212 |
| Cell Dimensions: |
a = 10.54, b = 9.9, c = 7.14, Z = 4; beta = 108.2ø V = 707.76 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P21/a |
| X Ray Diffraction: |
By Intensity(I/Io): 2.89(1) 2.81(0.9) 3.22(0.5) |
Physical Properties |
|
| Color: |
colorless, light yellow, dark yellow, brown, or brownish red. |
| Density: |
3.51 - 3.547, Average = 3.52 |
| Diaphaniety: |
Translucent |
| Hardness: |
6 - Orthoclase |
| Luster: |
Vitreous - Dull |
Optical Properties |
|
| Optical Data: |
Biaxial (-), a=1.67, b=1.69, g=1.72, bire=0.0500, 2V(Calc)=80, 2V(Meas)=40-70. |
Other Information |
|
| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Lavenite : 1 -Alkali Nuts 2 -Athena Mineralogy 3 - EUROmin Project 4 -MinDat.org Location Data 5 -MinMax 6 - Minerals of Wisconsin 7 -WWW-MINCRYST 8 -École des Mines de Paris Search for Lavenite using: Visit our Advertisers for Lavenite : Ask about Lavenite here : |
| Home | Crystal | X-Ray | Chem | Dana | Strunz | Determ | A-Z | Links |
